Monitoring Systems Patents (Class 318/565)
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Patent number: 6845337Abstract: A method for determining the rotational position of a motor drive shaft includes counting detected ripples contained in a motor current signal as the shaft is driven. Whether a ripple expected to be contained in the current signal at a probable time is absent from within a tolerance band containing the probable time of the expected current ripple is determined. If the expected ripple is absent from within the tolerance band containing the probable time, then whether a ripple is detected after the tolerance band of the expected ripple is determined. If a ripple is detected after the tolerance band and the expected ripple is absent from within the tolerance band, then the expected ripple is counted as a detected ripple. The determined rotational position of the shaft is based on the counted ripples. The length of the tolerance band dynamically changes as a function of a motor operating state.Type: GrantFiled: October 3, 2003Date of Patent: January 18, 2005Assignee: Leopold Kostal GmbH & Co. KGInventor: Tobias Gerlach
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Patent number: 6841962Abstract: A digitally indexed reciprocating linear actuator includes a frame and a servomotor mounted to the frame. A crank is gear-coupled with integer gear ratio to the servomotor for unidirectional rotation. An actuator slide with a non-home index point is slideably-mounted to the frame for linear motion. A connecting rod couples the crank to the actuator slide. The actuator also includes means, including a sensor, for detecting the index point at two angular positions of the crank. A wrapping machine for wrapping a plurality of articles has repeated cycles of article-handling operations and a plurality of carriages, each carriage capable of moving at least one article for wrapping. The wrapping machine includes at least one digitally indexed reciprocating linear actuator having a crank, and an actuator slide with a non-home index point. The wrapping machine records first and second servomotor angular positions on detecting the index point at first and second angular positions of the crank.Type: GrantFiled: August 23, 2002Date of Patent: January 11, 2005Assignee: Package Machinery Co. Inc.Inventors: Kevin N. O'Connor, John N. Bernet
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Patent number: 6839775Abstract: An apparatus for selecting, monitoring, and controlling electrically powered devices is disclosed. In one embodiment, the apparatus includes an electrically powered device having a key operating line and switching control circuitry to control usage of the electrically powered device by interrupting continuity of the key operating line. In another embodiment, the apparatus monitors usage of an electrically powered device. The apparatus includes a circuit which is coupled to the device to provide a power output of the device, an analog to digital converter coupled to receive the power output and convert the same to digital form, and a controller to receive a user input, process the user input by establishing communication with a remotely located device to request approval of a financial transaction, and generate control signals in response to receiving approval. The controller receives the digital form of the power output and monitors the operation of the electrically powered device.Type: GrantFiled: November 7, 2000Date of Patent: January 4, 2005Inventors: Kim Y. Kao, Bruce K. Sauer, Kent Kwan
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Patent number: 6838852Abstract: A plug and play electric machine interfaces with a plug and play controller. A memory device stores configuration parameters for operating an electric machine that are accessed by the plug and play controller. A plug and play connector connects to the plug and play controller. A sensor monitors a property of the electric machine. A sensor connector communicates with the sensor and the plug and play controller. The configuration parameters are transmitted to the plug and play controller during a power-up sequence of the electric machine. The plug and play electric machine connects to different plug and play controllers. A power connector is associated with the electric machine and communicates with a power driver included in the plug and play controller. The plug and play connector, sensor connector, and power connector form an integrated connector. The plug and play controller updates the configuration parameters based on feedback from the sensor.Type: GrantFiled: April 1, 2003Date of Patent: January 4, 2005Assignee: General Motors CorporationInventor: Chandra S. Namuduri
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Patent number: 6839653Abstract: A method for determining the position of an element driven by the drive shaft of a commutated direct current (DC) motor includes counting current ripples detected in an armature current signal as the motor rotatably drives the shaft. A frequency spectral analysis of the armature current signal is performed to determine frequency components of the armature current signal. The frequency components are analyzed to determine which of the frequency components is indicative of the current ripple frequency. The current ripple frequency is monitored for changes over time while the motor drives the shaft. The number of counted ripples is modified upon a change in the current ripple frequency in a time interval if the current ripple frequency change deviates from the current ripple frequency more than a threshold deviation for the time interval. The rotational position of the shaft is determined based on the modified number of counted ripples.Type: GrantFiled: October 7, 2003Date of Patent: January 4, 2005Assignee: Leopold Kostal GmbH & Co. KGInventor: Tobias Gerlach
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Patent number: 6834256Abstract: The reliability and remaining time before failure for electric motor systems and the like is determined with an ascertained statistical confidence based on continually monitored system parameters and a database comprised of historical failure mode/cause and repair data concerning the same motor and/or similar motor systems. A computational process is followed that relies upon hierarchical failure-tree structures, Weibull probability distributions and directed causal networks and which updates the probabilities and models used to forecast the remaining time before system failure based on the monitored parameters. Motor system operational parameter data is continually monitored at the site of the motor system and up-loaded via wireless or other communications network to a remote computer system where a database is maintained and reliability analysis is performed.Type: GrantFiled: August 30, 2002Date of Patent: December 21, 2004Assignee: General Electric CompanyInventors: Michael Brynn House, Gregory Lee Flickinger, Calvin Thomas Fritz, Hunt Adams Sutherland, Thomas Paul Repoff
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Patent number: 6832118Abstract: Components designed for use in networked control and monitoring systems including dedicated memory objects which store data representative of the system, the component and the function of the component in the system. The component-specific information may include data indicating the physical location of the component in the system. The objects are reprogrammable to adapt to system changes. A system comprising the components allows the objects to be accessed via a data network. Controlled or monitored parameters of the components may thus be collected in association with the other data stored in the objects.Type: GrantFiled: September 29, 2000Date of Patent: December 14, 2004Assignee: Rockwell Automation Technologies, Inc.Inventors: G. Erich Heberlein, Jon W. Simons, Louis K Kein, Kevin A Retlich, Wayne H. Wielebski, Kevin Baumann
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Patent number: 6825631Abstract: A controlling device of high follow-up accuracy is provided, the prediction accuracy of which is not degraded by an FF signal when the controlled object is feedforward-controlled. The prediction controlling device 1 has a feedforward signal generation command filter 2 for generating a future command increment which is an increment from one sampling period to the next sampling period of a target command signal from the present to a multiple-sampling future and the feedforward signal from the future target command signal. A prediction controller 3 receives the future command increment, the feedforward signal, and a controlled object output at the past sampling time over zero sampling, and determines the future error prediction value by using a transfer function model from the feedforward signal and the control input to the controlled object output.Type: GrantFiled: February 4, 2003Date of Patent: November 30, 2004Assignee: Kabushiki Kaisha Yaskawa DenkiInventor: Hiroshi Nakamura
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Publication number: 20040232866Abstract: One or more machine elements of a machine can be moved relative to a base by one or more position-controlled drives. The location of the machine element and control commands for the drives are transmitted to a monitoring unit. The monitoring unit determines based on the control commands a velocity profile for the machine element, wherein the magnitude of the velocity profile and its time derivative are limited. The monitoring device also determines based on the velocity profile a time dependence of the volumes that the machine elements and/or the base occupy before and during the execution of the control commands. Potential collisions between the machine element and at least the base are monitored based on the volumes.Type: ApplicationFiled: May 12, 2004Publication date: November 25, 2004Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Stephan Greff, Klaus Hertinger
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Patent number: 6806672Abstract: A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.Type: GrantFiled: April 28, 2003Date of Patent: October 19, 2004Assignee: The Chamberlain Group, Inc.Inventors: James J. Fitzgibbon, Paul E. Wanis, Colin B. Willmott
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Patent number: 6807463Abstract: A system of intelligent appliances coupled by common household power lines or wireless links. One or more of the appliances serves as a system controller and may include a further communications interface for coupling to an external communications network, such as the telephone network. The system can thus be accessed and controlled remotely. The system can also communicate with and obtain information from remote sources such as Internet-based facilities.Type: GrantFiled: October 4, 2000Date of Patent: October 19, 2004Assignee: Sunbeam Products, Inc.Inventors: Glen Cunningham, Kenneth R. Parker, Timothy E. Woods, Stephen J. Zwonitzer, Evan T. Ward, Maureen E. Carroll, John Hamann, JoAnne Lala, Lily Kunz, Mike Swieboda, Mark Devine, Jim Montagnino
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Patent number: 6803736Abstract: A system for controlling a regulator equipped with an electric servomotor in a motor vehicle. With reference to an example of an electronic steering system that has an electric-motor steering regulator, output parameters are generated by a model-assisted monitor for evaluating the suitability of a correction for the regulator, and thus criteria for a possible shutdown or to initiate emergency action, as a function of setpoint parameters for the electric servomotor, of instantaneous parameters measured by individual sensors, and of the driving state, and, based on a setpoint behavior of the regulator and on a model simulating the control sections it contains.Type: GrantFiled: March 5, 2002Date of Patent: October 12, 2004Assignee: Robert Bosch GmbHInventors: Mathias Hommel, Wolfgang Kraemer
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Patent number: 6791292Abstract: Accompanied by the optimization of the possibilities of use of a robot, particularly with regards to low cycle times and high loads, damage to the robot through exceeding the energy absorbable by the structure is still prevented when robot parts strike against the mechanical structure as a result of faults or errors, according to the invention in a method for controlling the movement of a robot, the kinetic energy of moving robot members (Gi gi+1, . . . , gn) about an axis (Ai) is limited to the energy absorbable in damage-free manner by a mechanical buffer associated with the corresponding axis (Ai).Type: GrantFiled: May 23, 2002Date of Patent: September 14, 2004Assignee: Kuka Roboter GmbHInventors: Martin Weiss, Thomas Finsterwalder, Günther Merk
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Patent number: 6781340Abstract: Control parameters are regulated without oscillating a servo control system. Respective control parameters P[p] (p=0, 1 - - - ), arranged in the order of gradually increasing a chance of oscillating the servo control system, are set sequentially starting with P[0], a torque command Tr or a fluctuation amount &sgr;, showing a variation in frequency component of vibration of a speed feedback amount &ohgr;, is determined for each of control parameters, and the servo control system is assumed to have reached an oscillation criticality when a fluctuation amount exceeds a specified value to thereby reset a control parameter set at that time to P[p−q] (q; natural number) or to P[0].Type: GrantFiled: September 6, 2002Date of Patent: August 24, 2004Assignee: Kabushiki Kaisha Yaskawa DenkiInventor: Koji Tomita
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Patent number: 6774596Abstract: A robotic machine such as a robotic vacuum cleaner is controlled to carry out a task of cleaning a room. The machine has a plurality of sensors including infrared sensors, ultrasonic sensors and light sensors through which the machine can navigate its way around a room without hitting objects or walls in its path. The machine has an indicator light which changes color depending upon the state of interaction of the various sensors with the environment, indicating the ‘mood’ of the cleaner. The indicator may include three primary color light sources which are combined within a reflective frusto-conical chamber and a translucent lens dome in order to combine the primary colors into a single colored light as viewed by a user. This makes the machine more user-friendly.Type: GrantFiled: November 9, 2001Date of Patent: August 10, 2004Assignee: Dyson LimitedInventor: David Lindsey Bisset
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Patent number: 6774595Abstract: The invention concerns a device and a method for monitoring an electromechanical brake-applying device designed for motor vehicle brakes. Said electromechanical brake-applying device comprises the following elements: a control member comprising an electric motor provided with electric supply; preferably a cylinder with accumulator including a spring which can be tensioned by the control member and serving to actuate a plunger to apply and release the vehicle brake. The monitoring device has a detecting unit for establishing an intensity and/or voltage curve of the current flowing in the electric supply whereof the output is connected to an evaluating unit for comparing the value of said intensity and/or voltage curve with previously stored threshold values and/or previously stored threshold value characteristic.Type: GrantFiled: July 1, 2002Date of Patent: August 10, 2004Assignee: Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbHInventors: Thomas Laxhuber, Hans Baumgartner, Wolfgang Pahle
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Patent number: 6771178Abstract: A flap to be identified is caused to move over the whole of its angular range of travel. The number of motor steps is counted during this movement, and the number of steps counted is compared with at least one pre-recorded information item corresponding to a particular flap or type of flap. The method is applicable to the checking of the correct fitting of actuator housings in an air-conditioning installation, or to the allocation of addresses to actuators connected to an information bus.Type: GrantFiled: January 15, 2002Date of Patent: August 3, 2004Assignee: Valeo ClimatisationInventors: Christophe Bruzy, Philippe Richardot
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Patent number: 6766258Abstract: A method includes identifying a degraded condition associated with the processing of a workpiece. At least one process tool associated with the degraded condition is identified. Trace data collection is enabled for the identified process tool. A system includes a processing system configured to process a workpiece and a tool monitor. The tool monitor is configured to identify a degraded condition associated with the processing of the workpiece, identify at least one process tool from the processing system associated with the degraded condition, and enable trace data collection for the identified process tool.Type: GrantFiled: May 31, 2002Date of Patent: July 20, 2004Assignee: Advanced Micro Devices, Inc.Inventors: Edward C. Stewart, Susan Hickey
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Patent number: 6741055Abstract: There are provided a positioning-controlling apparatus and a positioning-controlling method in which a rotary encoder (2) detects the Z phase before the subject (4) is return to the origin which is the position of the Z phase detected by the linear encoder (5). The driving mode of the servo motor (1) is switched from rectangular waveform pulse driving to sine waveform pulse driving upon the detection of the Z phase by the rotary encoder (2). The subject's moving direction for returning to the origin may be previously specified, and in which the detection of the ON state of the origin sensor (11), the detection of the Z phase by the rotary encoder (2), and the detection of the Z phase by the linear encoder (5) are done in this order, while the subject (4) is being moved in the above specified direction. Alternatively, the rotary encoder (2) may detect the CS phase instead of the Z phase.Type: GrantFiled: December 26, 2001Date of Patent: May 25, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takahiro Kurokawa, Yoichi Tanaka, Seiichi Matsuo, Seishiro Yanachi
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Patent number: 6728580Abstract: An apparatus for estimating the time to failure acceleration factor of a large industrial motor includes a sensor, a clock for controlling sensor sampling times, and a memory address calculator for mapping output signals of the sensor to a memory address. A unit is provided for incrementing the content of a specified memory address by unity.Type: GrantFiled: February 20, 2001Date of Patent: April 27, 2004Assignee: General Electric CompanyInventors: John Erik Hershey, Brock Estel Osborn, Kati Illouz, Gerald Burt Kliman
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Publication number: 20040061470Abstract: A brushless motor capable of suppressing noise and vibration resulting from relative positional displacement between a sensor magnet and magnetic sensors caused by assembling errors has a 3-phase brushless motor with a 6-pole sensor magnet rotating integrally with a rotor and hole elements arranged with an angular spacing of 20° (mechanical angle). Position signals are obtained from output signals of the hole elements, with the phases of output signals of one or two hole elements being inverted.Type: ApplicationFiled: July 9, 2003Publication date: April 1, 2004Inventors: Makoto Ito, Hideo Watanabe
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Patent number: 6713983Abstract: The present invention provides a servo-control apparatus for a motor, comprising position detecting means for detecting a rotational position of a motor, rotational speed signal generating means for generating a rotational speed signal corresponding to a rotational speed of a motor, and digital control means for generating an exciting electric current to be supplied to a coil of the motor as a PWM signal in accordance with the rotational speed signal from the rotational speed signal generating means, and wherein a switching signal for switching the exciting electric current to be supplied to the coil of the motor is formed by a pre-driver in accordance with the position detection signal from the position detecting means, and the pre-driver combines the switching signal with the PWM signal from the digital control means to generate an electric current control signal by which the motor is driven, thereby coping with the speed change of the motor quickly and stably.Type: GrantFiled: March 27, 2002Date of Patent: March 30, 2004Assignee: Canon Kabushiki KaishaInventor: Shoji Maruyama
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Patent number: 6708081Abstract: The invention is directed to electronic equipment, such as a pet robot, with an autonomous emotion-based function. The electronic equipment executes environment detection processing, emotion-production processing for producing an emotion, and movement determination processing for determining a movement based on the emotion. The movement determination processing is arranged such that actions representing the emotion by the movement of given parts of the pet robot are performed prior to main actions based on the emotion. Therefore, a user can understand the emotion of the pet robot by intuition and thereby predict the subsequent movement naturally and effectively, providing the user feeling that the movement of the pet robot is reasonable.Type: GrantFiled: July 27, 2001Date of Patent: March 16, 2004Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Makoto Yoshida
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Patent number: 6700345Abstract: The present invention provides methods, systems, and apparati for fail passive error detection and control of a linear actuator recentering system. In an exemplary aspect of the present invention, linear actuator controls are designed to be fail passive. In one exemplary embodiment of the present invention, a recentering device is provided which receives a signal from an independent motion direction sensor and enables continuous monitoring of a recentering function, thereby detecting recentering control failures. In another exemplary embodiment, the present invention comprises a recentering motor control commutation device, an actuator movement direction sensor and an inverse commutation device for determining a centering polarity. The centering polarity is further provided to an aircraft control system which suitably provides continuous verification of the recentering commutation by comparison to linear actuator position determined by another sensor.Type: GrantFiled: November 9, 2001Date of Patent: March 2, 2004Assignee: Honeywell Inc.Inventor: Dean Wilkens
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Patent number: 6697708Abstract: A robot apparatus includes a command controller (101) for outputting an output command associated with an input command, management units (102), (103) and (104) for outputting data associated with the commands output by the command controller (101), a command transmitter (105) for controlling the transmission of the data output by the management units (102), (103) and (104) and controllers (106), (107) and (108) for controlling action units (109), (110) and (111), such as a motor, based on data output by the command transmitter (105). The command transmitter (105) sends the action control data for synchronization, output by the management units (102), (103) and (104), in synchroneity to the action units (109), (110) and (111).Type: GrantFiled: September 24, 2002Date of Patent: February 24, 2004Assignee: Sony CorporationInventors: Tsuyoshi Takagi, Kohtaro Sabe, Takayuki Sakamoto, Kazufumi Oyama
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Patent number: 6697709Abstract: The stability of attitude of a robot can be recovered by an ambulation control apparatus and an ambulation control method if it is lost in the course of a gesture for which the upper limbs take a major role. The apparatus and the method obtain the pattern of movement of the entire body for walking by deriving the pattern of movement of the loins from an arbitrarily selected pattern of movement of the feet, the trajectory of the ZMP, the pattern of movement of the trunk and that of the upper limbs. Therefore, a robot can determine the gait of the lower limbs so as to realize a stable walk regardless if the robot is standing upright or walking. Particularly, if the robot is made to gesture, using the upper body half including the upper limbs and the trunk while standing upright, it can determine the gait of the lower limbs so as to make a stable walk in response to such a gait of the upper body half.Type: GrantFiled: July 15, 2002Date of Patent: February 24, 2004Assignees: Sony CorporationInventors: Yoshihiro Kuroki, Tatsuzo Ishida, Jinichi Yamaguchi
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Patent number: 6694287Abstract: A method and system for phase angle diagnostics in a sinusoidally excited PM electric machine, including: a controller that executes a process to facilitate the method including receiving a position value indicative of the rotational position from a position sensor configured to measure a rotor position of said electric machine and transmit a position signal; receiving a phase advance value indicative of a commanded phase advance angle; determining an expected phase voltage and expected status thereof; observing a selected phase voltage signal and determining an actual status corresponding thereto; and comparing the expected status and the actual status.Type: GrantFiled: August 30, 2001Date of Patent: February 17, 2004Assignee: Delphi Technologies, Inc.Inventors: Sayeed A. Mir, Mark P. Colosky
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Patent number: 6683431Abstract: A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.Type: GrantFiled: March 12, 2001Date of Patent: January 27, 2004Assignee: The Chamberlin Group, Inc.Inventors: James J. Fitzgibbon, Paul E. Wanis, Colin B. Willmott
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Patent number: 6683774Abstract: A monitoring system monitors a microcomputer in which an angle calculator calculates the electrical angle of a motor using output signals from a rotation angle sensor. In the microcomputer, a control signal generator generates a coded control signal that indicates the range to which the calculated electrical angle belongs. In the monitoring system, the electrical angle detected by the rotation angle sensor is multiplied by an excitation signal provided for the rotation angle sensor, and an angle detector detects the resultant signals. Based on the detected signals, a supervisory signal generator outputs a coded supervisory signal that indicates the range to which the electrical angle detected by the rotation angle sensor belongs. Then a fault detector determines that a failure occurs in the microcomputer, if a comparator determines that the coded control signal disagrees with the coded supervisory signal.Type: GrantFiled: May 13, 2002Date of Patent: January 27, 2004Assignee: Denso CorporationInventors: Hisashi Kameya, Hideki Amakusa
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Patent number: 6630807Abstract: A method and system of controlling a movable body portion of a vehicle where the body portion is moved by a motor responding to a control input. Power is applied to the motor upon actuation of the control input and a timer is maintained concurrent with the application of power. Power is removed from the motor as a function of expiration of the timer or relinquishment of the control input. The timer provides a maximum amount of time that power may be applied to the motor, thereby preventing damage to the movable body portion in the event it becomes jammed while being moved by the motor.Type: GrantFiled: April 26, 2002Date of Patent: October 7, 2003Assignee: DaimlerChrysler CorporationInventors: Alona E Pehrson, James E Zondag, Kenneth R Martek
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Patent number: 6616121Abstract: An object of the present invention is to provide a control system and a control method for servo valve which can stably continue to control a servo valve when a break occurs in servo coils of a servo valve having a plurality of servo coils. In the present invention, voltages of a plurality of servo coils 3A, 3B, 3C are detected by wire break detecting means individually provided to servo amplifiers 2A, 2B. 2C. The servo amplifiers 2A, 2B. 2C performs wire break detection and wire break compensation.Type: GrantFiled: August 2, 2002Date of Patent: September 9, 2003Assignee: Hitachi, Ltd.Inventors: Kazuyasu Asakura, Shouei Takahashi
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Patent number: 6594550Abstract: A method for controlling movement of an automated machine. The movement is defined by a plurality of steps. First, a buffer of a predetermined size is defined. The buffer stores a current step and one or more previous steps in the movement of the automated machine. Then a current step in the movement of the automated machine is executed. Next, the buffer is checked to see if the current step executed in the movement of the automated machine movement is the same as a predetermined step of interest. If the current step is a predetermined step of interest, the buffer is checked to determine what at least one previous step was. If the current step was the step of interest, a new step is executed in the movement of the automated machine, the new step executed depending on what the at least one previous step was.Type: GrantFiled: March 29, 2002Date of Patent: July 15, 2003Assignee: ASM America, Inc.Inventor: Angel Y. Okrah
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Patent number: 6580245Abstract: A critical resonant frequency (fres) of the axes of a moving machine element is damped as effectively as possible with the aid of a jerk limitation. Good damping in the case of a desired frequency is achieved when the longest possible time (TrLim) which can be traveled with a maximum permissible jerk (rLim) is selected such that 1/TrLim coincides with the lowest natural frequency (fres) of the participating axes. This finding is implemented by adapting the path dynamics such that the TrLim=aMax/rLim yielded by the prescribed dynamics limiting values is varied by reducing the maximum jerk (rLim) to achieve good damping results for the lowest natural frequency (fres) of the participating axes.Type: GrantFiled: August 14, 2001Date of Patent: June 17, 2003Assignee: Siemens AktiengesellschaftInventors: Bernd Quaschner, Theo Reichel, Elmar Schaefers, Wilhelm Westermeyer, Georg Wiegaertner
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Patent number: 6577095Abstract: AC servo motor drives which allow several AC drives to be connected in parallel and allow for the connection and reconnection of AC servo motors to be accomplished primarily through a central processing unit (CPU). Thus, multiple AC servo motor drives may be ganged under the supervision of the CPU to provide a servo motor with multiple times the current available from a single drive and optionally redundancy in the drives. To provide necessary coordination, the required motor current magnitude and phase (current vector) are broadcast by an axis controller to the drives. This command current vector is broadcast over a high speed serial data bus which allows many simultaneous listeners (the AC servo motor drives). To protect against damage to each drive, each of the three current output terminals is preceded by an output filter. The output filters preceding the terminals permit phase by phase parallel connection of several drives in the service of one servo motor.Type: GrantFiled: June 14, 2000Date of Patent: June 10, 2003Assignee: Whedco, Inc.Inventor: Paul W. Firehammer
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Patent number: 6563281Abstract: A device for monitoring operation of a driving arrangement including at least a servo-mechanism, which includes a regulator, a driving motor controlled by the regulator, and an element which can be set in motion by the driving motor. A detection arrangement detects deviations between intended and actual movement positions of the element and an operation inhibiting and/or alarming arrangement inhibits operation of the driving arrangement and/or starts an alarm when impermissible deviations are detected. The monitoring device includes a redundant driving arrangement, which include at least one auxiliary servomechanism including a redundant regulator, a redundant driving motor controlled by the redundant regulator, and a redundant element which can be set in motion by the redundant driving motor.Type: GrantFiled: July 16, 2001Date of Patent: May 13, 2003Assignee: ABB ABInventors: Karl-Gustav Ramström, Torgny Brogårdh
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Patent number: 6559615Abstract: A motor control includes a driver, an inverter, and a controller. The inverter electrically couples an input of the driver, an input of the controller, and a plurality of outputs of the controller. The controller is configured to actuate the driver. The method actuates a motor through the driver and the inverter.Type: GrantFiled: April 6, 2001Date of Patent: May 6, 2003Assignee: Continental Teves, Inc.Inventor: Lalit Sethi
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Patent number: 6535178Abstract: There is provided an antenna device having a learning function and capable of searching and memorizing wireless frequency bands. A control circuit is used to automatically control the receiving angle and direction of an antenna set. When the strongest frequency band is found by the antenna set, a remote control is used to control the circuit for recording the current angle and direction into a memory unit. Afterwards, a user can directly select a pre-stored band identification number to conveniently adjust the antenna device to have the best receiving angle and direction the corresponding capable of receiving the band, thereby decreasing the time to adjust the antenna.Type: GrantFiled: October 23, 2001Date of Patent: March 18, 2003Inventor: Cheng-Si Wang
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Patent number: 6534942Abstract: An intelligent control and regulating device, especially for use in the process technology for flowable substances and media, which is built into the housing of an adjusting drive mechanism or into the drive mechanism itself and which has an adjustment arrangement controlling an adjusting member via an auxiliary energy device depending on sensor signals. The inventive control and adjusting device, which reacts reliably and rapidly to changing ambient conditions, includes a parameterable process regulator which receives adjustment input signals from the external sensors.Type: GrantFiled: January 31, 2000Date of Patent: March 18, 2003Assignee: PS Automation GmbH für Gesellschaft AntriebstechnikInventor: Max Schmidhuber
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Patent number: 6526324Abstract: A controller capable of monitoring a receiving circuit for receiving machine information. Machine information from a machine is received by a plurality of independent systems and the external signals received by the plurality of systems are compared, thereby, a receiving state of the receiving circuit is monitored. The controller includes a plurality of independent receiving units for receiving the external signal and monitoring units for comparing signals received by the plurality of receiving units, to monitor the receiving units based on a result of the comparison.Type: GrantFiled: November 25, 1998Date of Patent: February 25, 2003Assignee: Fanuc Ltd.Inventors: Jiro Kinoshita, Yutaka Muraoka
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Patent number: 6522096Abstract: A mechanism controller for controlling power to motors of a mechanism having several motors, such as a robot. Each motor has a resolver for indicating the motor position. A driver unit is associated with each motor to supply power to the motor. Each driver unit includes a monitoring unit to monitor indications from the resolver of the associated motor. In one embodiment a control unit is connected to the driver units in a series circuit to control power to the motors and to receive the monitored indications from the monitoring units. In a second embodiment, the control unit is connected to the driver units in a ring circuit, rather than in a series circuit. Preferably, each driver unit also includes a memory device, and the control unit can send commands to the driver units and receive data from the driver units in sets equal in number to the number of driver units so that the commands and data do not need to include the addresses of the specific driver units.Type: GrantFiled: February 28, 2000Date of Patent: February 18, 2003Assignee: Kuka Roboter GmbHInventor: Stefan Roth
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Patent number: 6519506Abstract: With a robot and a control method for it, information is read in from the outside, based on which a particular object is detected, and it is judged upon detecting the object whether or not the object satisfies given conditions, based on the judgment results of which a robot generates predetermined actions. Thus, a robot can be realized that acts naturally like a living thing. Consequently, its entertaining quality for human beings can be increased greatly.Type: GrantFiled: December 19, 2001Date of Patent: February 11, 2003Assignee: Sony CorporationInventor: Hiroshi Osawa
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Patent number: 6512965Abstract: With a robot and a control method for it, information is read in from the outside, based on which a particular object is detected, and it is judged upon detecting the object whether or not the object satisfies given conditions, based on the judgment results of which a robot generates predetermined actions. Thus, a robot can be realized that acts naturally like a living thing. Consequently, its entertaining quality for human beings can be increased greatly.Type: GrantFiled: December 19, 2001Date of Patent: January 28, 2003Assignee: Sony CorporationInventor: Hiroshi Osawa
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Patent number: 6507163Abstract: A bridge surface preparation, maintenance and painting system has a truck-mounted man lift with an extensible platform on which robot arms and cameras are mounted. Inflatable bags isolate the area of the bridge being worked on, and an apron catches debris such as from sand blasting. An operator sits at a remote control console on a truck, directs the man lift platform into position, controls the inflating of the barriers and operates and guides the robot arms through master-slave controls while watching video displays. The machine is used for surface preparation, undercoating, finish coat painting and bridge inspections.Type: GrantFiled: December 20, 1993Date of Patent: January 14, 2003Inventor: Mark A. Allen
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Patent number: 6498450Abstract: A method of bridging partial tightnesses of moveable members received in guides and driven by electric drive motors provides an automatic monitoring function. Within a tightness region, a releasing force is varied in one or several steps. An automatic bridging function is utilized, which corresponds to the rotary speed course, and an automatically operating control operates so that the releasing force is increased only in a limited region of the identified bridging location.Type: GrantFiled: February 20, 2001Date of Patent: December 24, 2002Assignee: Robert Bosch GmbHInventor: Hubert Lamm
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Patent number: 6496741Abstract: A method, computer system, and program product for optimizing a useful objective function with respect to a dynamic parameter vector and a static parameter vector. The method, called the static/dynamic control (MDC) method, either minimizes or maximizes the useful objective function subject to a state equation, initial conditions, terminal conditions, constraints, and dynamic limitations. The SDC method includes an algorithm having two formulations: a period formulation and a fully continuous formulation. With the period formulation, the dynamic optimization variables associated with the dynamic limitations are permitted to be discontinuous, parametric functions of time. With the fully continuous formulation, the dynamic optimization variables are permitted to be continuous, non-parametric functions of time. The SDC method is computer implementable and employs an iterative process including an inner loop and an outer loop.Type: GrantFiled: March 25, 1999Date of Patent: December 17, 2002Inventor: Gregory J. Whiffen
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Patent number: 6490500Abstract: The present invention provides a visual drag diagnostic apparatus, software and method for CNC machines. The present invention creates a visual display or plot of the drag values associated with the CNC machine's moving components along each axis of movement of a tool holder or table. The plot created by the present invention provides a diagnostic tool to evaluate the operational status of the CNC machine, which is quick to perform and easy to understand by the operator. Knowing the drag values allows an operator to foresee problems with tool holder or table movement before making a product, thereby saving time and money during machining operations.Type: GrantFiled: May 29, 1999Date of Patent: December 3, 2002Assignee: ParadyneInventor: Joseph W. McCulloch
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Patent number: 6489741Abstract: Motion of a substrate-transporting robot arm is controlled in order to compensate for inaccuracies and deflections encountered during operation. The compensation is effected by synchronizing elevational and planar motions of the robot arm such that the trajectory of the substrate is made coincident with the object axis of the substrate. The substrate may be a semiconductor wafer, an LCD panel or an end effector of the robot arm. The synchronized motion is achieved using a controller issuing control signals to arm actuating means based on synchronization algorithms developed during analytical or experimental robot learning sessions.Type: GrantFiled: August 9, 2000Date of Patent: December 3, 2002Assignee: Genmark Automation, Inc.Inventors: Genco Genov, Zlatko M. Sotirov, Eugene Bonev
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Patent number: 6486633Abstract: A method for monitoring the speed of a synchronous motor, the synchronous motor having a permanent magnet rotor (3) and coils (1, 2), sinusoidal currents being applied to the coils (1, 2). Also a device for monitoring the speed of such a motor, wherein in at least one of the coils (1, 2) the power supply is disconnected and one or more voltage characteristics (U1, U2) are evaluated which are induced by the permanent magnet rotor (3) in one or more of the coils (1, 2) disconnected from the power supply, the minimum duration of the interruption of the power supply of the coils (1, 2) and the evaluation of the voltage characteristic (U1, U2) being equal to the temporal spacing between two consecutive zero crossings of the respectively induced voltage characteristics (U1, U2).Type: GrantFiled: December 22, 1999Date of Patent: November 26, 2002Assignee: Mannesmann VDO AGInventor: Klaus Kronenberg
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Patent number: 6466844Abstract: A robot for synchronizing with other robots without raising costs, a robot system, and a robot control method. The robot includes a storage portion (11) in which an operating program for the robot is stored, a main arithmetic portion (12) for analyzing the operating program stored in the storage portion, a sequencer portion (13) from which a signal from the main arithmetic portion is output, a driving portion (14) for driving the robot to which the signal from the main arithmetic portion (12) is input, and a communications portion (15) for communicating with apparatuses connected to a network. In the robot, a signal input from an apparatus connected to the sequencer portion (13) and a signal input to the communications portion (15) are input to the main arithmetic portion (12) so as to perform a calculation, and, based on the calculation, a signal is output from the main arithmetic portion (12) to the sequencer portion (13) or to the driving portion (14).Type: GrantFiled: December 26, 2001Date of Patent: October 15, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tatsuya Ikeda, Hisatomi Fujiki, Akio Shindo
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Patent number: 6452360Abstract: A method for calculating a first and second gain for a controller circuit for a plant is disclosed. The method comprises the steps of providing a reference model circuit with desired circuit characteristics, providing a reference model adaptive circuit, setting the second gain to zero, supplying a spectrally rich input signal to the reference model and to the controller circuit, determining the first gain by continuously adjusting the first gain until an output of the reference model and an output of the controller circuit are substantially equal, setting the first gain to the previously determined value, determining the second gain by continuously adjusting the second gain until an output of the reference model and an output of the controller circuit are substantially equal and setting the second gain to the previously determined value.Type: GrantFiled: December 3, 1999Date of Patent: September 17, 2002Assignee: Square D. CompanyInventor: Roy Stephen Colby