"reset" Systems (p.i.) Patents (Class 318/609)
  • Patent number: 12130646
    Abstract: A real-time temperature-pressure detection and rapid processing system for a calibration platform, comprises an inner return pipe, and a water supply pipe is provided therein with an inner water supply pipe. An outer wall of the inner water supply pipe is connected with an inner wall of the water supply pipe through multiple springs. An outer wall of the inner return pipe is connected with an inner wall of a return pipe through multiple springs. The return pipe and the water supply pipe are made of a thermosetting polymer material. The multiple springs, the inner water supply pipe, and the inner return pipe are covered with a heat conducting material. The system further includes a temperature-pressure detection assembly. The assembly includes multiple infrared sensors arranged at two sides of the return pipe and the water supply pipe, a booster pump, a heater, and infrared sensors connected with a control unit.
    Type: Grant
    Filed: December 22, 2022
    Date of Patent: October 29, 2024
    Assignee: SICHUAN UNIVERSITY
    Inventors: Zetian Zhang, Heping Xie, Ru Zhang, Yihang Li, Jianan Li, Ling Chen, Mingzhong Gao, Wei Huang, Li Ren, Chendi Lou, Kun Xiao, Weiqiang Ling, Zhilong Zhang
  • Patent number: 12088150
    Abstract: A machine tool includes a machine control unit to output control signals to drives for machine elements. A tool which machines a workpiece is thereby moved relative to the workpiece in a position-controlled manner. Arranged in a first region of one machine element is an active vibration damper to damp vibration in a second region of the machine elements as the workpiece is machined by the tool. In order to detect the vibration, a first sensor is arranged in the first region of the machine element and a second sensor is arranged on another machine element or in a different region of the one machine element. Actual values detected by the first and second sensors and corresponding target values are supplied to a dual controller which determines on the basis of these values, a resulting manipulated variable for the active vibration damper and actuates the active vibration damper accordingly.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: September 10, 2024
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jochen Bretschneider, Uwe Ladra, Elmar Schäfers, Torsten Schür
  • Patent number: 12070178
    Abstract: The present disclosure provides a surface cleaning apparatus that includes a recovery system that extracts liquid and debris with a drying cycle in which forced air flows through a recovery pathway of the recovery system to dry out components that remain wet and/or retain moisture after normal operation of the apparatus. The post-operation drying cycle can dry out components such as an agitator or brushroll, a brush chamber, a suction nozzle, a recovery tank, a filter, and any of the various conduits, ducts, and/or hoses fluidly coupling components of the recovery system together.
    Type: Grant
    Filed: July 10, 2023
    Date of Patent: August 27, 2024
    Assignee: BISSELL Inc.
    Inventors: Kurt Ashbaugh, Jason W. Pruiett, David M. Miller, Todd R. VanTongeren
  • Patent number: 12053889
    Abstract: A kinematics model-free trajectory tracking method for a robotic arm includes the following steps. Obtain an actual trajectory equation ra(t) of the robotic arm at time t according to a sensor, and combines the actual trajectory equation ra(t) with a predetermined target trajectory equation rd(t) to obtain a first error function e(t). Obtain a differential equation (I) of a state change rate of a driver of the robotic arm. Obtain a second error function ?(t). Pass the second error function c(t) through the applied gradient neural network to obtain equation (IV). Jointly solve equation (I) and equation (IV) to obtain an joint state vector ?(t) of the robotic arm. Drive a motion of the robotic arm by a controller according to the joint state vector ?(t) of the robotic arm to complete trajectory tracking.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: August 6, 2024
    Assignee: SUN YAT-SEN UNIVERSITY
    Inventors: Ning Tan, Mao Zhang, Peng Yu
  • Patent number: 12057798
    Abstract: According to some embodiments, method for controlling a motor comprises generating a drive signal for the motor, the drive signal comprising a demand flux generating voltage parameter. A feedback torque generating current parameter and a feedback flux generating current parameter are determined based on a three-phase motor current measurement. A feedback flux generating voltage parameter is determined based on the feedback torque generating current parameter and the feedback flux generating current parameter. An estimated motor position and an estimated motor speed are determined based on the feedback flux generating voltage parameter and the demand flux generating voltage parameter. The drive signal is generated based on the estimated motor position and the estimated motor speed.
    Type: Grant
    Filed: June 24, 2021
    Date of Patent: August 6, 2024
    Assignee: INFINEON TECHNOLOGIES AUSTRIA AG
    Inventor: Vedant Sadashiv Chendake
  • Patent number: 11973455
    Abstract: An electric motor controller system for modulating requested motor torque via oscillating the instantaneous torque, including a bi-stable torque controller; a proportional-integral (PI) velocity controller a proportional-integral-differential (PID) position controller; and sinusoidal zero-velocity table mapping.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: April 30, 2024
    Assignee: AEROVIRONMENT, INC.
    Inventors: Michael Leonardi, William Nicoloff
  • Patent number: 11967508
    Abstract: The present invention relates to a damper control system and a damper control method for controlling an opening degree of an exhaust damper connected to an exhaust duct. The damper control system (300) includes an exhaust damper (310), a first pressure sensor (311), and a controller (315) configured to control an opening degree of the exhaust damper (310). The controller (315) is configured to switch the opening degree of the exhaust damper (310) to an opening degree smaller than a full opening on condition that a shutter (217) is opened.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: April 23, 2024
    Assignee: EBARA CORPORATION
    Inventors: Akira Imamura, Mitsuru Miyazaki, Junji Kunisawa
  • Patent number: 11921013
    Abstract: A one-dimensional (1D) and two-dimensional (2D) scan scheme for a tracking continuously scanning laser Doppler vibrometer (CSLDV) system to scan the whole surface of a rotating structure excited by a random force. A tracking CSLDV system tracks a rotating structure and sweep its laser spot on its surface. The measured response of the structure using the scan scheme of the tracking CSLDV system is considered as the response of the whole surface of the structure subject to random excitation. The measured response can be processed by operational modal analysis (OMA) methods (e.g., an improved lifting method, an improved demodulation method, an improved 2D demodulation method). Damped natural frequencies of the rotating structure are estimated from the fast Fourier transform of the measured response. Undamped full-field mode shapes are estimated by multiplying the measured response using sinusoids whose frequencies are estimated damped natural frequencies.
    Type: Grant
    Filed: October 21, 2022
    Date of Patent: March 5, 2024
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Weidong Zhu, Linfeng Lyu
  • Patent number: 11740136
    Abstract: A circuit includes a first input terminal, a second input terminal, a third input terminal and an output terminal. A first summation node adds signals at the first and third input terminals. A second summation node subtracts signals at the second and third input terminals. A selector selects between the added signals and subtracted signals in response to a selection signal. The output of the selector is integrated to generate an integrated signal. The integrated signal is compared by a comparator to a threshold, the comparator generating an output signal at the output terminal having a first level and a second level. Feedback of the output signal produces the selection signal causing the selector to select the added signals in response to the first level of the output signal and causing the selector to select the subtracted signals in response to the second level of the output signal.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: August 29, 2023
    Assignee: STMicroelectronics S.r.l.
    Inventors: Michele Vaiana, Paolo Pesenti, Mario Chiricosta, Calogero Marco Ippolito, Mario Maiore
  • Patent number: 11711016
    Abstract: In described examples of a system having a proportional-integral control module, an error signal is produced that is indicative of a difference between a reference signal and an output signal. An integral control signal is produced by integrating the error signal using an integrator time constant value. During a steady state condition, a first integrator time constant value is used. When an undershoot in the output signal is detected, the integrator time constant value is increased to a second time constant value that is larger than the first integrator time constant value during the undershoot condition. The integrator time constant value is reduced to a third integrator time constant value that is less than the first integrator time constant value during a period following the undershoot condition.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: July 25, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Naman Bafna, Preetam Charan Anand Tadeparthy, Ammineni Balaji, Sreelakshmi Suresh
  • Patent number: 11669651
    Abstract: In the design of a mechanical component for a mechanical device driven by a feedback controlled electric motor, the user is enabled to easily know how the properties of mechanical component affect the generation of abnormal vibrations of the mechanical device. In a design assist apparatus (1), the processor (11) is configured to set a plurality of parameters of a mathematical model of an analysis target component selected from one or more mechanical components (24, 56, 58) forming the mechanical device, compute a pole of a transfer function of the mechanical device associated with one or more vibration modes of the mechanical device according to the parameters, and create a stability determination diagram including an isoline of a real part of the pole of the transfer function.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: June 6, 2023
    Assignees: MIKI PULLEY CO., LTD, NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY
    Inventors: Ryuta Sato, Atsushi Nagao, Takeshi Hashimoto, Taichi Sasaki
  • Patent number: 11630425
    Abstract: A servo control device for controlling an end effector of a machine to follow a set reference trajectory by driving the machine using an actuator includes a feedforward compensation unit that performs feedforward compensation by outputting a feedforward signal for controlling the actuator on the basis of a position command signal inputted thereto, wherein input-output characteristics represented in a continuous-time system of the feedforward compensation unit are expressed by a transfer function having unstable zeros, and a step response of the feedforward compensation unit has an initial undershoot.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: April 18, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akio Saito, Hidetoshi Ikeda
  • Patent number: 11621574
    Abstract: An apparatus including a proportional gain circuit, an integral gain circuit, a limit circuit, a gain booster circuit and a combiner. The gain circuits apply a proportional gain and an integral gain to an error signal, and the combiner combines both gained error signals to provide a control signal. The limit circuit applies a limit function that limits the proportional gain to a magnitude. The gain booster circuit increases gain while the limit function is being applied. The increased gain may be applied to only the integral gain, or to both the integral and proportional gains such as by boosting gain of the error signal. The apparatus may be a regulator that may include multiple control loops providing multiple error signals, in which a mode selector selects one of the error signals to control regulation. The limit function increases stability while the boosted gain improves transient response during mode transitions.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: April 4, 2023
    Assignee: Intersil Americas LLC
    Inventors: M. Jason Houston, Eric M. Solie, Mehul D. Shah
  • Patent number: 11456691
    Abstract: The present disclosure provides an inverter control device which estimates back electromotive force of an induction motor, and which uses a torque current and a flux current so as to calculate a slip frequency and compensate for same, thereby enabling the motor to operate at a constant speed. To this end, the present invention may comprise: a command voltage generating unit for outputting, to an inverter, a three phase PWM voltage with respect to a command frequency on the basis of a voltage/frequency operation; and a slip frequency determining unit for determining a slip frequency on the basis of a phase current and a phase voltage of a motor driven by the inverter.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: September 27, 2022
    Assignee: LS ELECTRIC CO., LTD.
    Inventors: Seung-Cheol Choi, Hak-Jun Lee
  • Patent number: 11452233
    Abstract: A method and apparatus for controlling fan speed are provided. The method obtains a first PWM value and a second PWM value of the fan based on the temperature of the server component respectively through a PID regulation algorithm and an open-loop control algorithm, and controls the fan speed based on the larger value of the first PWM value and the second PWM value.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: September 20, 2022
    Assignee: ZHENGZHOU YUNHAI INFORMATION TECHNOLOGY CO., LTD.
    Inventor: Guangyi Yu
  • Patent number: 11429074
    Abstract: A device-system comprises parallel operating devices (105-107) for driving an operating quantity towards a target value, and a control system for controlling each device at least partly based on a device-specific integral term relating to a time integral of a device-specific error signal that is indicative of a deviation of the operating quantity from the target value. The control system comprises a stabilizing system that computes an arithmetic average of the device-specific integral terms and corrects the device-specific integral terms towards the computed arithmetic average. The correction of the device-specific integral terms makes it possible to avoid unwanted drifts in the device-specific integral terms in a situation where there are differences between the device-specific error signals. The devices can be peers to each other and thus redundancy is achieved because one device can be removed from or added to the device-system without actions from the other devices.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: August 30, 2022
    Assignee: Danfoss Editron Oy
    Inventors: Antti Tarkiainen, Risto Tiainen, Matti Iskanius
  • Patent number: 11328164
    Abstract: A system and method for taillight signal recognition using a convolutional neural network is disclosed. An example embodiment includes: receiving a plurality of image frames from one or more image-generating devices of an autonomous vehicle; using a single-frame taillight illumination status annotation dataset and a single-frame taillight mask dataset to recognize a taillight illumination status of a proximate vehicle identified in an image frame of the plurality of image frames, the single-frame taillight illumination status annotation dataset including one or more taillight illumination status conditions of a right or left vehicle taillight signal, the single-frame taillight mask dataset including annotations to isolate a taillight region of a vehicle; and using a multi-frame taillight illumination status dataset to recognize a taillight illumination status of the proximate vehicle in multiple image frames of the plurality of image frames, the multiple image frames being in temporal succession.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: May 10, 2022
    Assignee: TUSIMPLE, INC.
    Inventors: Panqu Wang, Tian Li
  • Patent number: 11177750
    Abstract: A motor control apparatus according to one embodiment of the present invention comprises: a current controller for generating a voltage command signal on the basis of a torque command for driving a motor and a fundamental wave current of the motor; a high frequency voltage generator for generating a high frequency voltage signal for injection into the voltage command signal; an inverter for applying a voltage to the motor on the basis of the voltage command signal and the high frequency voltage signal; an angle estimator for generating an estimated angle of a rotor of the motor on an estimated coordinate system on the basis of a current signal of the motor; and a compensator for adding a first compensation signal (icomp) to the current signal (isig), wherein the first compensation signal (icomp) may be related to the torque command and the estimated angle.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: November 16, 2021
    Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Seung-Ki Sul, Yong-Cheol Kwon, Joohyun Lee
  • Patent number: 11121654
    Abstract: Dynamic stability control for electric motors is provided. The system determines, for an electric motor of the electric vehicle, a slip frequency indicating a difference between a synchronous speed of a magnetic field of the electric motor and a rotating speed of a rotor of the electric motor. The system compares the slip frequency with a threshold. The system activates, responsive to the slip frequency greater than or equal to the threshold, a slip limiter to adjust a current command to generate an adjusted current command that causes a reduction in the slip frequency. The system deactivates, responsive to an external torque command less than a subsequent current command received subsequent to transmission of the adjusted current command, the slip limiter.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: September 14, 2021
    Assignee: SF MOTORS, INC.
    Inventors: Apoorva Athavale, Ruonan Zhou, Chen-Yen Yu, Yifan Tang
  • Patent number: 10977576
    Abstract: A control device generates a second command value by compensating a first command value output at every control cycle according to a predetermined pattern with a correction amount output at every control cycle according to correction data, updates the correction data based on a deviation between the first command value and a feedback value from the control object, and determines an initial value of the correction data. The control device acquires a response characteristic indicating a relationship between an assigned command value and a feedback value shown in the control object in response to the command value, estimates a feedback value to be shown in the control object based on a value obtained by compensating the first command value with temporary correction data and the response characteristic, and updates the temporary correction data based on a deviation between the first command value and the estimated feedback value.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: April 13, 2021
    Assignee: OMRON Corporation
    Inventors: Masaki Namie, Takashi Fujii, Akiro Kobayashi
  • Patent number: 10931214
    Abstract: A motor unit includes a motor, a controller that outputs a pulse signal, a driver that supplies a drive current to the motor based on the pulse signal, and a detector that determines an actual rotation number of the motor. The controller includes calculators that calculate control values of a rotation number of the motor, and control stages. The controller also includes a pulse generator that selects one of the control values calculated by the calculators to generate the pulse signal based on the control value selected, at each of the control stages.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: February 23, 2021
    Assignee: NIDEC SERVO CORPORATION
    Inventor: Charles Simson Halason Silitonga
  • Patent number: 10897681
    Abstract: A system is provided to analyze cross-modulation distortion in audio devices, which may include testing with audio frequencies. One or more distortion signals from the audio device may be measured for an amplitude, phase, and or frequency modulation effect. In another embodiment a musical signal may be used as a test signal. Providing additional test signals to the audio device can induce a time varying cross-modulation distortion signal from an output of the audio device. Also utilizing at least one additional filter, filter bank, demodulator and or frequency converter and or frequency multiplier provides extra examination of distortion. Also frequency and or phase response can be measured with the presence of a de-sensing signal and or another signal that induce near slew rate limiting or near overload condition of the device under test.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: January 19, 2021
    Inventor: Ronald Quan
  • Patent number: 10858927
    Abstract: Disclosed embodiments include systems and methods for estimating real-time bit forces experienced on a drill bit and decoupling bit force disturbances. Real-time bit forces can be estimated based on bit force observers using measurements from downhole sensor subs. Model-based observers that adopted to estimate the bit force from downhole sensor sub measurements. Strain and torque measurements as measured by the sensor subs are used to estimate bit force and bit torque. These measurements can be observed using an effective observer design with the estimated bit force and bit torque based on sensor sub measurements to track the real bit force and bit torque. Observations of estimated bit forces and identified bit force disturbances can be used perform drilling dynamics modeling and identify the occurrence of negative drilling events.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: December 8, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jason D. Dykstra, Yuzhen Xue
  • Patent number: 10794772
    Abstract: A circuit includes a first input terminal, a second input terminal, a third input terminal and an output terminal. A first summation node adds signals at the first and third input terminals. A second summation node subtracts signals at the second and third input terminals. A selector selects between the added signals and subtracted signals in response to a selection signal. The output of the selector is integrated to generate an integrated signal. The integrated signal is compared by a comparator to a threshold, the comparator generating an output signal at the output terminal having a first level and a second level. Feedback of the output signal produces the selection signal causing the selector to select the added signals in response to the first level of the output signal and causing the selector to select the subtracted signals in response to the second level of the output signal.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: October 6, 2020
    Assignee: STMicroelectronics S.r.l.
    Inventors: Michele Vaiana, Paolo Pesenti, Mario Chiricosta, Calogero Marco Ippolito, Mario Maiore
  • Patent number: 10754358
    Abstract: A method (400) for controlling a proportional valve. The method includes the steps of: (i) providing (410) a proportional flow valve system that includes: a closed loop flow controller (110) including a proportional flow control valve (140), a flow sensor (150), and an adjustable gain (180); and an adaptive controller (120) including a model (160) of the closed loop flow controller, and a gain control (170); (ii) actuating (420) the proportional flow control valve; (iii) measuring (430) actual gas flow; (iv) determining (440) a difference between the measured gas flow rate and a desired gas flow rate; (v) adjusting (450) the proportional flow valve using the determined difference; (vi) initiating (460) a response from the model of the closed loop flow controller; (vii) determining (470) a gain for the closed loop flow controller; and (viii) adjusting (480) the adjustable gain of the closed loop flow controller.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: August 25, 2020
    Assignee: Koninklijke Philips N.V.
    Inventor: Michael Anthony Borrello
  • Patent number: 10733465
    Abstract: A system and method for taillight signal recognition using a convolutional neural network is disclosed. An example embodiment includes: receiving a plurality of image frames from one or more image-generating devices of an autonomous vehicle; using a single-frame taillight illumination status annotation dataset and a single-frame taillight mask dataset to recognize a taillight illumination status of a proximate vehicle identified in an image frame of the plurality of image frames, the single-frame taillight illumination status annotation dataset including one or more taillight illumination status conditions of a right or left vehicle taillight signal, the single-frame taillight mask dataset including annotations to isolate a taillight region of a vehicle; and using a multi-frame taillight illumination status dataset to recognize a taillight illumination status of the proximate vehicle in multiple image frames of the plurality of image frames, the multiple image frames being in temporal succession.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: August 4, 2020
    Assignee: TUSIMPLE, INC.
    Inventors: Panqu Wang, Tian Li
  • Patent number: 10709510
    Abstract: A catheter procedure system includes a bedside system having a percutaneous device, at least one drive mechanism coupled to the percutaneous device and at least one motor coupled to the at least one drive mechanism. The system also includes a workstation that is coupled to the bedside system and includes a user interface and a controller coupled to the bedside system and the user interface. The controller is programmed to receive at last one parameter of the motor, determine a quadrature current of the motor based on at least the at least one parameter, determine a load torque on the motor based on at least the quadrature current, an angular velocity and an angular acceleration and control the operation of the motor based on the load torque, wherein the operation of the motor causes the drive mechanism to move the percutaneous device.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: July 14, 2020
    Assignee: CORINDUS, INC.
    Inventor: Nicholas Kottenstette
  • Patent number: 10637266
    Abstract: An apparatus including a proportional gain circuit, an integral gain circuit, a limit circuit, a gain booster circuit and a combiner. The gain circuits apply a proportional gain and an integral gain to an error signal, and the combiner combines both gained error signals to provide a control signal. The limit circuit applies a limit function that limits the proportional gain to a magnitude. The gain booster circuit increases gain while the limit function is being applied. The increased gain may be applied to only the integral gain, or to both the integral and proportional gains such as by boosting gain of the error signal. The apparatus may be a regulator that may include multiple control loops providing multiple error signals, in which a mode selector selects one of the error signals to control regulation. The limit function increases stability while the boosted gain improves transient response during mode transitions.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: April 28, 2020
    Assignee: Intersil Americas LLC
    Inventors: M. Jason Houston, Eric M. Solie, Mehul D. Shah
  • Patent number: 10608569
    Abstract: A control device of an AC rotating electrical machine includes: a midpoint potential detection unit 12 that detects, for respective phases, midpoint potentials 43, 44, 45 of upper switching elements 41 and lower switching elements 42 of an inverter circuit 20; a phase current detection unit 23 that detects a phase current of each phase of an AC rotating electrical machine 3; and a CPU 11 that calculates a current estimated value Idc of DC current that is input from a DC power supply 2 to the inverter circuit 20, on the basis of the detected midpoint potential of each phase and the phase current of each phase.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: March 31, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Daisuke Matsumuro, Keiichi Enoki, Yoshimasa Nishijima, Masutaka Watanabe, Shingo Harada, Yasukazu Murata
  • Patent number: 10536069
    Abstract: A vehicle includes an electric machine operated by an inverter. The electric machine includes a gate driver configured to energize a switch of the inverter with a pulse width modulation (PWM) signal. The gate driver is configured to delay the PWM signal by a dependent amount that is a function of a magnitude of current of a lead of the electric machine. The delay is responsive to a polarity of the current being positive.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: January 14, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Jiyao Wang, Wei Xu, Silong Li
  • Patent number: 10505488
    Abstract: Systems and method for controlling an alternating current (AC) electrodynamic machine (390) with a variable frequency drive (VFD) (380) include a control system (300) with a phase-locked-loop (PLL) circuit (382) for providing a stator flux angle signal (338) to the VFD (380), the PLL circuit (382) comprising a proportional integral (PI) regulator (332) providing an output signal (334); and a feedforward generator (350) in communication with the PLL circuit (382), wherein the feedforward generator (350) tracks a stator flux position of the AC electrodynamic machine (390) such that the feedforward generator (350) determines a stator frequency signal (352) based on stator flux signals (308, 310, 312) and supplies the stator frequency signal (352) downstream of the PI regulator (332), and wherein the stator frequency signal (352) is summed with the output signal (334) of the PI regulator (332) to provide a dynamically adapted output signal (335) of the PI regulator (332), and wherein the adapted output signal (33
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: December 10, 2019
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Richard H. Osman
  • Patent number: 10476423
    Abstract: A synchronous motor control device includes a voltage detector, a current detector, an inverter main circuit, and an inverter control unit. The inverter control unit includes: a phase current reproduction unit that reproduces a direct current into phase currents flowing to a permanent magnet synchronous motor; a current coordinate transformation unit that transforms the reproduced phase current into current on a control coordinate axis of a rotating coordinate system; a current control unit that calculates a voltage command value of the permanent magnet synchronous motor in such a manner that the current on the control coordinate axis equals a specific value; and a limiter unit that limits the value of the voltage command value.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: November 12, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuo Kashima, Tomohiro Kutsuki, Tomomi Higashikawa, Akiyoshi Muramatsu
  • Patent number: 10451296
    Abstract: An environmental control system is provided and includes equipment to generate an environmental control effect, a damper associated with a zone to control a portion of the environmental control effect permitted to affect the zone by assuming one of various damper positions and a capacity controller operably coupled to the equipment and the damper to control operation of the equipment and to adjust the damper to assume the one of the various damper positions based on a demand of the zone and a capacity of the equipment.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: October 22, 2019
    Assignee: CARRIER CORPORATION
    Inventors: Junqiang Fan, Futao Zhao, Stevo Mijanovic, Rajendra K. Shah
  • Patent number: 10387736
    Abstract: A system method for detecting taillight signals of a vehicle using a convolutional neural network is disclosed.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: August 20, 2019
    Assignee: TUSIMPLE
    Inventors: Yijie Wang, Ligeng Zhu, Panqu Wang, Pengfei Chen
  • Patent number: 10326354
    Abstract: An embodiment pertains to a method including determining if an amplitude of an error signal has entered steady state. If the amplitude of the error signal has not entered steady state, then amplify with a high gain the amplitude of the AC component of the error signal. If the amplitude of the error signal has entered steady state, then initiate a timer. Determining if the amplitude of the error signal has remained in steady state while the timer runs. If the amplitude of the error signal has remained in steady state while the timer runs, then amplify with a low gain the amplitude of the AC component of the error signal.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: June 18, 2019
    Assignee: Intersil Americas LLC
    Inventor: David L. Beck
  • Patent number: 10278304
    Abstract: A fan control system for a computer system is provided. The computer system includes a fan and a target device. The fan control system includes a controller to control the rotation speed of the fan. The controller determines a time-variable rate of the rotation speed according to an operating parameter of the target device. Particularly, the controller determines the time-variable rate of the rotation speed according to a ratio of the consumed power to the rated power of the target device. Alternatively, the controller can determine the rotation speed according to the ratio of the consumed power to the rated power of the target device.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: April 30, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Shih-Chen Chang, Chih-Pao Chang, Marcus A. Kelly, Yu-Chen Kung, Chen-Wei Lee, Guo-Sheng Mo, Ming-Hui Pan, Su-Jen Tsai
  • Patent number: 10253997
    Abstract: Disclosed is a system to control a climate of a space via a first control loop and a second control loop interacting with the first control loop. The system includes a first controller of the first control loop to generate a first control signal based on a first modified set point and a first feedback signal. The system further includes a second controller of the second control loop to generate a second control signal based on a second modified set point and a second feedback signal. The system further includes a decoupler configured to predict a first effect of the first control signal on the second control loop and a second effect of the second control signal on the first control loop, and generate the first modified set point and the second modified set point to reduce the first effect and the second effect.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: April 9, 2019
    Assignee: Johnson Controls Technology Company
    Inventors: Timothy I. Salsbury, Carlos Felipe Alcala Perez, John M. House, Christopher R. Amundson
  • Patent number: 10108177
    Abstract: A control parameter adjustment device includes a command-value generation unit that generates a position command; a servo control unit that calculates a drive command such that a response position of a driven object follows the position command; a correction model unit that generates a correction command for correcting a response error that is a difference between the position command and the response position by using a model expressed by two or more types of parameters; and a parameter search unit that corrects the model by using a combination of values of the parameters, by which the response error is minimized, among a plurality of combinations of values of the parameters. The control parameter adjustment device drives the driven object on the basis of the drive command and the correction command.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: October 23, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoya Fujita, Kotaro Nagaoka, Masahiro Ozawa
  • Patent number: 10073436
    Abstract: A fully-closed loop position controller with a velocity control system based on a velocity feedback of mixed velocities of a motor velocity and a load velocity. The fully-closed loop position controller identifies a ratio of load moment of inertia in real time to select an optimum mix gain in accordance with a changing ratio of load moment of inertia such that a position loop gain and a speed loop gain can be varied accordingly. The fully-closed loop position controller controls the load position based on the mix gain, the position loop gain, and the velocity loop gain.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 11, 2018
    Assignee: OKUMA CORPORATION
    Inventor: Satoshi Eguchi
  • Patent number: 10069445
    Abstract: A motor controller to control a motor includes a position controller, a speed controller, a first integrator, and a second integrator. The position controller is configured to generate a speed command based on a position error between a position command and a motor position. The speed controller is configured to generate a torque command to be input to the motor based on a speed error between the speed command and a motor speed. The first integrator is configured to calculate an integral value of the position error to be added to the position error. The second integrator is configured to calculate an integral value of the speed error to be added to the speed error.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: September 4, 2018
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Yasufumi Yoshiura, Yasuhiko Kaku, Yusuke Oka, Atsuo Ikeda
  • Patent number: 10008963
    Abstract: A compensation function constituting device calculates a correlation coefficient based on a moving distance required for reversing a moving direction of a movable unit and a sliding resistance acting on the movable unit, and a compensation amount output device calculates a moving distance on a position command value required until the movable unit starts to move according to the correlation coefficient and a feedback torque when the moving direction is reversed and increases a torque compensation amount in accordance with the moving distance after reversing the moving direction until the moving distance after the moving direction is reversed reaches the moving distance required until the movement is started.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: June 26, 2018
    Assignee: OKUMA CORPORATION
    Inventors: Takeshi Sakai, Masashi Miyaji
  • Patent number: 9998053
    Abstract: An improved system for controlling operation of a motor with a motor drive is disclosed. The motor drive includes a control module having an inner control loop operable to generate a torque reference signal and a load observer operable to generate an estimate of the torque present on the motor. The torque estimate is summed with the torque reference signal to generate a modified torque reference. The bandwidth of the load observer is set wide enough to generate the estimated torque over a desired operating range of the motor. The control module may also include a low pass filter and at least one tracking notch filter. The low pass filter suppresses vibrations at high frequencies, and the tracking notch filter suppresses resonances present at frequencies above the bandwidth of the load observer and within the pass band of the low pass filter.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: June 12, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Robert J. Miklosovic, Brian Fast, Mark Chaffee
  • Patent number: 9998037
    Abstract: A control apparatus of a synchronous motor according to the present invention includes: a current command generation unit for generating a d-phase current command and a q-phase current command; a current detection unit for detecting a d-phase current and a q-phase current; a short-circuiting device for short-circuiting the synchronous motor to apply dynamic braking to the synchronous motor; and a short-circuit control unit for controlling the short-circuiting device; wherein the current command generation unit controls the q-phase current command so as to decrease the q-phase current after receipt of a dynamic braking signal; and the short-circuit control unit controls the short-circuiting device to short-circuit the synchronous motor after the receipt of the dynamic braking signal and after a lapse of a predetermined time from the control of the q-phase current command by the current command generation unit.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: June 12, 2018
    Assignee: FANUC CORPORATION
    Inventor: Tatsuya Senoo
  • Patent number: 9973128
    Abstract: Periodic disturbance occurs in current etc. due to offset error and gain error of a current sensor used in a control device. A voltage command value is generated from a current command value and a current detection value by the current sensor in a current control section. The generated voltage command value is inputted to a plant model section, and a virtual current value is calculated. The virtual current value is inputted to a periodic disturbance observer via a coordinate transform section, and a compensation value is calculated. The compensation value is superimposed on the current detection value via a coordinate inverse-transform section, and the current detection value of the current sensor is corrected.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: May 15, 2018
    Assignee: MEIDENSHA CORPORATION
    Inventors: Takashi Yamaguchi, Yugo Tadano
  • Patent number: 9932701
    Abstract: A laundry appliance is provided, comprising a motor and a controller connected to the motor. The controller determines at least one characteristic of the motor, identifies the motor from a plurality of possible known motors based on the at least one characteristic, identifies the rotor from a plurality of possible known rotors based on the at least one characteristic, and configures at least one motor operation parameter based on the identity of the motor and/or rotor. The at least one characteristic may include the resistance of a stator coil and/or a magnetic flux constant.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: April 3, 2018
    Assignee: Whirlpool Corporation
    Inventors: Matheus Alexandre Bevilaqua, Marcelo Campos Silva
  • Patent number: 9920943
    Abstract: A feedback controller for generating and using a normalized performance index for a feedback control loop is shown and described. The feedback controller is configured to generate an input for a control process, identify an error signal representing a difference between a setpoint and a feedback signal from the control process, compute a first exponentially-weighted moving average (EWMA) of a first function of the error signal and a second EWMA of a second function of the error signal, and to generate a normalized performance index using the first EWMA and the second EWMA.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: March 20, 2018
    Assignee: Johnson Controls Technology Company
    Inventors: Timothy I. Salsbury, Carlos F. Alcala
  • Patent number: 9837951
    Abstract: A motor apparatus and a motor control method are provided. The method includes the following steps. An actual speed and an actual current of a motor module are sensed by a sensor module. An adjusted speed is kept at a set speed or a speed curve by a speed adjusting circuit. A control signal is provided by a feedback control circuit according to a difference between the adjusted speed and the actual speed. The control signal is converted to a current to drive the motor module, such that the actual speed is kept at the adjusted speed. When the actual speed is decreased and the actual current is increased to a limited current value, a setting parameter of the feedback controller is changed according to the limited current value, such that the control signal enters a saturation state and the actual current is kept at the limited current value.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: December 5, 2017
    Assignee: Kinpo Electronics, Inc.
    Inventor: Chuan-Chia Tsui
  • Patent number: 9803883
    Abstract: An environmental control system is provided and includes equipment to generate an environmental control effect, a damper associated with a zone to control a portion of the environmental control effect permitted to affect the zone by assuming one of various damper positions and a capacity controller operably coupled to the equipment and the damper to control operation of the equipment and to adjust the damper to assume the one of the various damper positions based on a demand of the zone and a capacity of the equipment.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: October 31, 2017
    Assignee: CARRIER CORPORATION
    Inventors: Junqiang Fan, Futao Zhao, Stevo Mijanovic, Rajendra K. Shah
  • Patent number: 9688116
    Abstract: A method for controlling an air conditioner compressor of a vehicle is disclosed. The method includes adjusting a displacement command in response to an error between an expected air conditioner evaporator temperature and a measured or inferred air conditioner evaporator temperature, the displacement command is further adjusted via adding a value to the displacement command based on desired air conditioner evaporator temperature, the value determined apart from the error between the expected air conditioner evaporator temperature and the measured or inferred air conditioner evaporator temperature.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: June 27, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: John Eric Rollinger, Jeffrey Allen Doering, Hugh Hamilton, Brent Jacobsen, Steve Pryor Perry
  • Patent number: 9644650
    Abstract: The present invention relates to a driver self-tuning method using an electro-hydraulic actuator system, the method comprising: a step in which a specific EHA system is selected by a HMI; a step of displaying a graph defining the mapping relationship of an actuator speed command with respect to a joystick command of the selected EHA system; a step in which, when a predetermined button is pressed by a user, the actuator maximum speed is tuned by multiplying the maximum speed value of the actuator of the selected EHA system, which has been pre-stored, by gain that increases or decreases in proportion to the number of times the button was pressed; and a step of storing the tuned actuator maximum speed in the upper controller of the EHA system. Equipment using the electro-hydraulic actuator system makes it possible to directly tune actuator speed characteristics that cannot be achieved with existing equipment using, by way of example, HMI display equipment and operating buttons.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: May 9, 2017
    Assignee: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventor: Ji-Yun Kim