Abstract: To provide a servo motor controller that can quickly and effectively stop an industrial machine at a particular position even if operation speed is relatively low when a fixed position stop command is issued. The servo motor includes a speed comparison unit configured to compare speed at a time of a fixed position stop command with a first speed, a fixed position stop operation determination unit configured to determine an operation method at the time of the fixed position stop command, and a fixed position stop control unit configured to control the servo motor based on the determined operation method.

Abstract: An apparatus for the production a cushion product from a single- or multi-layer continuous paper strip includes a feed unit for drawing the paper strip into the apparatus, a cutting unit for cutting the cushion product from the paper strip, and control electronics for the activation of the cutting unit according to a predetermined motion profile. A sensor captures a rotation angle position of the feed unit. The control electronics are configured to activate the feed unit continuously and to start an activation of the cutting unit for a discontinuous cutting operation during capturing a predetermined actual rotation angle position of the feed unit.

Abstract: Single-counter, multi-trigger systems and methods in communication systems consolidate tracking of multiple trigger events into a single counter in place of plural counters. The single counter may track multiple trigger events for a single triggered element. Likewise, the single counter may track trigger events for a plurality of triggered elements. By consolidating tracking of trigger events with reference to a single counter, the size of the circuit may be reduced and power savings may be achieved.

Abstract: An analog output current transmitter includes a first circuit portion that generates analog sine and cosine voltage signals, a second circuit portion that transforms the analog sine and cosine voltage signals into current signals, the signals being transformed by an operational transconductance amplifier, and a third circuit portion providing a current limiter, the current limiter circuitry limits the output current to a defined threshold. No microcontroller is required in order to monitor and regulate the output current to the defined threshold. Also a system and method for sensing shaft bearing shaft rotation over 360 mechanical degrees having an analog output current transmitter is provided.

Abstract: For encoder offset fine tuning, a processor iteratively reduces an encoder offset error of the motor with a third offset step until the motor starts. The processor iteratively modifies the encoder offset of the motor turning in a positive direction with a first offset step until the motor stops. The processor further records the encoder offset as a first encoder offset. The processor iteratively modifies the encoder offset with the first offset step until the motor starts turning in a negative direction. The negative direction is opposite the positive direction. The processor iteratively modifies the encoder offset with a second offset step until the motor stops. The processor records the encoder offset as a second encoder offset. In addition, the processor calculates a final encoder offset as a function of the first encoder offset and the second encoder offset.

Abstract: A detection device detects a dynamic quantity exerted on a detection mechanical system including first and second mechanical oscillators. The detection device includes first to third transducers, a canceller, a low-pass filter, and an inverting amplification unit. The first transducer detects the first mechanical oscillator position in a first direction to output a first signal. The second transducer detects the second mechanical oscillator position in a second direction to output a second signal. The canceller inverts a direction in which a signal detected by the second transducer from the second mechanical oscillator varies according to the first signal. The third transducer detects the second mechanical oscillator position in the second direction to output a third signal. The inverting amplification unit gives a control signal generated by inverting the third signal to a second actuator moving the second mechanical oscillator.

Abstract: The electric vehicle control method is a control method that includes the motor that gives braking force or driving force to a vehicle in accordance with an accelerator operation, by which the braking force is controlled when an accelerator operation amount is smaller than a given value and the driving force is controlled when the accelerator operation amount is the given value or larger. The electric vehicle control device estimates disturbance torque that acts on the motor as resistance component relating to a gradient and executes correction by which the braking force or the driving force is increased or decreased so as to cancel the resistance component in accordance with a disturbance torque estimated value Td. Then, on a downhill road at a given gradient or more, a correction amount of the braking force or the driving force is reduced.

Abstract: The disclosure provides an apparatus and method of compensating for a torque of a motor. The apparatus includes a torque information collector configured to collect steering information, motor position information, and predetermined motor information, a torque ripple calculator configured to determine a target torque based on the steering information and to determine a compensation torque for torque ripple based on the target torque and the motor information, a compensation current calculator configured to determine a compensation current value based on the motor information and the compensation torque, a current value generator configured to convert the target torque into a target current value and to generate an output current value based on the target current value and the compensation current value, and a current signal output configured to output a current control signal corresponding to the output current value.

Abstract: A sheet conveying apparatus includes a controller to set conveyance speeds of first, second, and third conveyance rotary members. The controller sets the conveyance speed of a sheet by the second conveyance rotary member to a first conveyance speed, which is the same as a conveyance speed of the sheet by the first conveyance rotary member, and a second conveyance speed which is different from the first conveyance speed. When the controller sets the conveyance speed of the sheet by the first conveyance rotary member to the first conveyance speed and sets the conveyance speed of the sheet by the second conveyance rotary member to the second conveyance speed, the controller sets the conveyance speed of the sheet by the third conveyance rotary member to a third conveyance speed which is a speed between the first conveyance speed and the second conveyance speed.

Abstract: A numerical control device comprises a command position calculation section that calculates command position information based on a machining program; a command path calculation section that calculates command path information based on the command position information; an estimated actual position calculation section that calculates estimated actual position information based on the command position information and transmission characteristic information; an estimated actual path calculation section that calculates estimated actual path information based on the estimated actual position information; a path error calculation section that calculates path error based on the command path information and the estimated actual path information; a machining time calculation section that calculates a machining time based on the estimated actual path information; a jerk calculation section that calculates jerk based on the estimated actual position information; and an evaluation position calculation section that calcul

Abstract: Technical solutions are described for providing torque ripple compensation when a motor control system is operating in feedforward mode. An example motor control system includes a feedforward controller that receives a first current command corresponding to an input torque command, and receives a second current command corresponding to a torque ripple. The feedforward controller generates a voltage command based on the first current command and the second current command, the voltage command being applied to a motor.

Abstract: A wheel stability control system for an electric vehicle including an electric motor, a drive inverter, and an electronic control unit (ECU) including a computer readable, non-transitory memory (memory) and an electronic processing unit (EPU). The memory stores information including an optimal acceleration and deceleration curve and the electrical characteristics of the electric motor. The EPU calculates the electrical moment of the electric motor from inputs from the drive inverter and the electrical characteristics of the electric motor. The ECU compares the electrical moment and the angular speed of the motor with the optimal acceleration and deceleration curve, and if the acceleration or deceleration of the electric motor is out of a predetermined range when compared to the optimal acceleration and the optimal deceleration, it reduces the electrical moment applied by the electric motor.

Abstract: Various embodiments provide a material handling vehicle (MHV) and associated method provide for damping of mast oscillations of a mast of the MHV. In one approach, mast oscillations can be detected and/or anticipated and a countering force can be generated by an elevated reach actuator of the MHV to damp the oscillations.

Abstract: Barrier operator systems and methods of operation include a mechanical drive subsystem with a segmented and self-locking rail unit, rail mounting supports, belt and chain drive tensioning, and drive assembly carriage and interface; electronics and software routines for controlling operation of the various barrier operator functions; wall console communicating with the barrier operator; encryption and decryption of access codes; establishment and monitoring of travel limits and barrier speed and force profiles; thermal protection of barrier operator drive motors; and establishment and control of wireless communications from the barrier operator to accessories.

Abstract: In order to provide a tool changer that can detect an entry of a foreign substance into a turret mechanism portion or wear of a turret mechanism part, a tool changer of the present invention includes a reference phase false detection sensing portion that monitors load variations which occur in a turret drive source and detects an entry of a foreign substance into the turret mechanism portion based on a difference between the load variations and a reference load used as a reference. Moreover, the reference phase false detection sensing portion can also detect the progress of wear of the turret mechanism part based on the integral of the absolute value of a difference between the load variations which occur in the turret drive source and the reference load used as a reference.

Abstract: Methods, computer-readable media, and systems are disclosed for controlling a turret assembly with two or more gimbaled, swivel assembly sub-systems, such as a gimbaled gun and a gimbaled electro-optical sensor. The turret can be automatically slewed in response to one of the swivel assemblies rotating. A user can switch turret modes reflecting a priority between the gimbaled sub-systems system so that one takes priority over the other(s) during a mission.

Abstract: A cutter switching system includes a supporting platform, a cutter magazine mounted on the supporting platform, and a sensing assembly mounted on the cutter magazine. The cutter magazine includes a cutter storing frame and a driving assembly. The cutter storing frame includes a cylindrical main body, and a plurality of cutters mounted all around the main body. The driving assembly includes a cam indexer engaging with the cutter storing frame for rotating the cutter storing frame. The sensing assembly is mounted on the cam indexer, and the sensor senses the rotation of the cam indexer to establish the static position and the rotation required of the cutter magazine. The present disclosure further provides a machine tool using the cutter switching system.

Abstract: A machine tool which processes a machine target object using a main shaft which revolves, the machine tool includes a support portion which supports the main shaft; a first driving unit which revolves the main shaft about a first axis; a second driving part which feeds the main shaft from the support portion in a direction of the first axis; a control part which changes an upper limit value of a revolution speed of the main shaft according to a feeding length of the main shaft fed from the support portion; and a memory unit which associates and stores the upper limit value of the revolution speed and the feeding length.

Abstract: A device, a tool, and a method for machining, especially polishing, of an optical lens by means of a tool are proposed, an information medium on one working surface of the tool being optically acquired and removed as the lens is machined and thus the state of the tool being indicated.

Abstract: A control method for an electric power steering system is provided. The method includes providing a power steering control signal; providing a disturbance cancel command; varying at least one filter based on a frequency of the disturbance cancel command; applying the at least one varied filter to the disturbance cancel command to generate a compensation signal; applying the compensation signal to the power steering control signal to generate a compensated control signal; and controlling the power steering system based on the compensated control signal.

Abstract: The system has a driving circuit for the motor of the electric fan, coupled to the electrical system of a motor vehicle and having a plurality of controlled electronic switches, and an electronic control unit arranged to control the driving circuit in such a way as to cause the flow in the motor of a variable average current capable of producing a required speed of rotation, in accordance with a predetermined relationship or function. The control unit is designed to store a predetermined threshold of rotation speed, and to control the motor through the associated driving circuit in such a way that when the rotational speed of the motor exceeds the threshold the driving circuit causes electrical braking of the motor.

Abstract: An apparatus for finding a machine tool origin includes a base and a sensor positioned on a first side of the base. The sensor includes probe engagement components and electronic circuitry. The probe engagement components are configured for movable engagement with a probe of the machine tool to produce electronic signals processed by the electronic circuitry to provide a signal indicative of the machine tool origin. Mechanical positioning components are positioned on a second side of the base. The mechanical positioning components include a pedestal with a first tab and a second tab aligned to be operable as a mechanical stop with the second tab corresponding to the position of a right-hand origin for the machine tool and the second tab and a third tab aligned to be operable as a mechanical stop with the second tab corresponding to the position of a left-hand origin for the machine tool.

Abstract: A numerical controller capable of visually and accurately analyzing a change of the tool trajectory before and after changing a processing condition, whereby a parameter of a drive axis can be properly adjusted. The numerical controller comprises a numeric controlling part which controls each drive axis based on a predetermined position command; a position data obtaining part which obtains position data of each drive axis controlled by the numerical controlling part; a tool coordinate calculating part which calculates a coordinate of a tool center point based on position feedback or obtained position data of each drive axis and information of a mechanical structure of a machine tool; a tool trajectory storing part which stores the calculated coordinate of the tool center point as a feedback trajectory; and a displaying part which displays the stored feedback trajectory on a display.

Abstract: A command value generating circuit determines an acceleration profile indicating changes in acceleration of a mechanical load over time. The acceleration profile is determined such that the mechanical load is accelerated from a stop at a first position to a peak velocity, and is decelerated from the peak velocity to stop at a second position, and that the absolute value of an acceleration during accelerating and decelerating the mechanical load is equal to or less than an upper limit acceleration, and that the acceleration is maintained at the upper limit acceleration for a period of time from starting to accelerate the mechanical load, and then, gradually decreased from the upper limit acceleration. The command value generating circuit determines a velocity profile indicating changes in the velocity of the mechanical load over time, according to the acceleration profile, and generates a position command value, according to the velocity profile.

Abstract: A microcontroller chip includes a serial data transmitter having a serial data output pin and an inverter having an input pin and an output pin, the input pin connected to the serial data output pin of the serial data transmitter, the output pin of the inverter and the output pin of the serial data transmitter forming a differential serial data transmission line.

Abstract: A actuator driver includes a digital filter configured to perform phase compensation of a digital torque command signal using a fed-back digital signal; a digital PWM generator configured to generate a plurality of pulse-width modulated PWM control signals in response to an output of the digital filter; at least one H bridge configured to select and output a first or second terminal voltage in response to the plurality of PWM control signals; first and second continuous time ?? A/D converters configured to convert the first and second terminal voltages from analog to digital, respectively; and a feed-back filter configured to decimate outputs of the first and second continuous time ?? A/D converters to feed back the digital signal to the digital filter.

Abstract: A signal processor includes an AD converter that converts a periodic analog signal output from a detector in accordance with a position Q of a motor to a digital signal at a predetermined conversion period, a tracking circuit that calculates a position P of the motor at an arithmetic period on the basis of the digital signal that is converted and output at the conversion period by the AD converter, an operation state identifier that identifies an operation state of the motor on the basis of the position P of the motor calculated by the tracking circuit, and an arithmetic period determiner that changes the arithmetic period of the tracking circuit in accordance with the operation state of the motor identified by the operation state identifier such that the position P of the motor calculated by the tracking circuit follows the actual position Q of the motor.

Abstract: A projector includes: a drive motor adapted to drive a lens unit; a control section adapted to control the drive motor; a storage section adapted to store a target position of the lens unit; and a position detector adapted to detect a present position of the lens unit, wherein if a deviation between the target position stored in the storage section and the present position detected by the position detector is equal to or larger than a predetermined value, the control section performs drive of the drive motor with feedforward control until the present position and the target position are coincident with each other, and performs drive control of the drive motor with a predetermined unit based on a deviation between a stop position by the feedforward control and the target position.

Abstract: A small motor controller (SMC) system includes a motor configured to control a position of a rotor, a sensor configured to detect position information of the rotor by detecting a feature on the rotor, the sensor including a detection zone having a first side and a second side, and a motor control unit. The motor control unit is configured to determine a position of the rotor corresponding to one of the first side of the detection zone and the second side of the detection zone based on whether the feature on the rotor is detected crossing the first side or the second side, respectively.

Abstract: A PWM-signal-output circuit includes a detecting unit to detect periods in which a speed signal with logic level changing alternately and having a period corresponding to a motor-rotation speed is at one and the other logic levels, a dividing unit to divide each of the periods into first to third periods; a first output unit to change a PWM-signal duty-cycle in a stepwise manner toward an input-signal duty-cycle in the first period, a second output unit to cause a PWM-signal duty-cycle to become equal to an input-signal duty-cycle, to maintain a current flowing through the motor coil constant, in the second period; and a third output unit to change a PWM-signal duty-cycle in a stepwise manner from an input-signal duty-cycle, to decrease a current flowing through the motor coil, in the third period.

Abstract: When a short-circuited FET is identified as one of low-side FETs, maximum phase voltages of three phases are detected when a steering operation is performed by a driver, and the detected maximum phase voltages of the three phases are compared with one another to identify a short-circuit phase. On the other hand, when a short-circuited FET is identified as one of high-side FETs, minimum phase voltages of the three phases are detected when a steering operation is performed by the driver, and the detected minimum phase voltages of the three phases are compared with one another to identify a short-circuit phase.

Abstract: A motor control apparatus includes a power converter, a speed controller, and a stop position controller. The power converter outputs a current to drive a motor based on a torque command. The speed controller generates the torque command based on an error between a speed command of the motor and a speed of the motor. The stop position controller calculates an acceleration command to output a predetermined torque after detection of a reference position per revolution of a position detector for a first time during speed control of the motor, generates a torque feed-forward command based on the acceleration command, generates a position command based on the acceleration command, and generates the speed command based on an error between the position command and the motor position to execute position control of the motor.

Abstract: A servomotor control circuit for an air conditioner apparatus of a vehicle includes a drive control section for controlling drive of a servomotor so that the servomotor attains a target stop position, a rotation position change detection section for detecting a change in the rotation position of the servomotor, and an operation limit check section for checking, based on the change in the rotation position of the servomotor, whether the servomotor has attained the operation limit position. The drive control section stops drive of the servomotor without reception of a servomotor drive stop command produced from a main control apparatus, when the servomotor is determined as having attained the operation limit position.

Abstract: A closed loop shift control apparatus and method based on estimated torque in friction elements controls a torque transfer phase when shifting from a low gear configuration to a high gear configuration for an automatic transmission system. When pressure actuated friction elements are selectively engaged and released to establish torque flow paths in the transmission, estimates of torsional load exerted on the off-going friction element are used to predict the optimal off-going friction element release timing for achieving a consistent shift feel. The estimated torque is preferably calculated by using estimated torque signals generated as a function of speed measurements represented either the engine speed and turbine output speed or transmission output speed and wheel speed under dynamically changing conditions.

Abstract: A small motor controller (SMC) system includes a motor configured to control a position of a rotor, a sensor configured to detect position information of the rotor by detecting a feature on the rotor, the sensor including a detection zone having a first side and a second side, and a motor control unit. The motor control unit is configured to determine a position of the rotor corresponding to one of the first side of the detection zone and the second side of the detection zone based on whether the feature on the rotor is detected crossing the first side or the second side, respectively.

Abstract: An integrated servo system and a method of controlling a motor is provided. The integrated servo system includes a position detector which determines original position data of a motor and a position signal processor which determines a position of the motor based on the determined position data. The integrated servo system further includes a servo controller circuit which controls the motor based on the determined position data and a parallel bus through which the determined position data is transmitted from the position signal processor to the servo controller circuit.

Abstract: The present invention provides a position sensorless control method of a high performance permanent magnet synchronous motor during emergency operation, which can accurately detect a magnetic pole position of the synchronous motor based on a position sensorless vector control using an adaptive observer configured based on a permanent magnet synchronous motor model.

Abstract: A motor control apparatus includes a power converter, a speed controller, and a stop position controller. The power converter outputs a current to drive a motor based on a torque command. The speed controller generates the torque command based on an error between a speed command of the motor and a speed of the motor. The stop position controller calculates an acceleration command to output a predetermined torque after detection of a reference position per revolution of a position detector for a first time during speed control of the motor, generates a torque feed-forward command based on the acceleration command, generates a position command based on the acceleration command, and generates the speed command based on an error between the position command and the motor position to execute position control of the motor.

Abstract: The present invention discloses a bi-direction driver IC and a method for bi-directionally driving an object. The method comprises: providing a first and a second integrated circuit (IC) chips, coupled with an object to be driven, wherein each of the first and second IC chips is capable of single-directionally driving the object; providing a reverse current path in each of the first and second IC chips; driving the object in a first direction by the first IC chip, wherein current flows through the reverse current path in the second IC chip; and driving the object in a second direction by the second IC chip, wherein current flows through the reverse current path in the first IC chip.

Abstract: A microcomputer which obtains a rotor position signal from a biphase signal delivered by a resolver mounted on an electric motor according to a rotation phase of a rotor relative to a stator, thereby controlling the motor based on the rotor position signal. The microcomputer includes a digital signal converter which is configured by hardware and converts the biphase signal delivered from the resolver into a digital data position signal, the digital signal converter being mounted on a single chip.

Abstract: A motor control device comprises: an acceleration upper limit estimating unit; a target acceleration setting unit; a motor control unit; and a deficit calculating unit, wherein the target acceleration setting unit corrects the target acceleration based on the acceleration profile by an amount corresponding to the acceleration deficit within a range in which the target acceleration does not exceed the acceleration upper limit on the basis of the acceleration deficit calculated by the deficit calculating unit to set the target acceleration at each time.

Abstract: In order to obtain an NC device that can easily shift by an arbitrary amount a main spindle single-revolution reference signal without being dependant on hardware and while rotating a main spindle, the NC device includes a main spindle reference angle correction amount setting unit for inputting a correction angle of a reference point, a main spindle within-single-revolution feed-back position correction unit for correcting the reference point by a correction angle set by the main spindle reference angle correction amount setting unit, and a main spindle within-single-revolution command position correction unit for correcting a main spindle within-single-revolution command position by the correction angle set by the main spindle reference angle correction amount setting unit.

Abstract: A method of constant airflow control for a ventilation system is disclosed. The method includes various controls to accomplish a substantially constant airflow rate over a significant change of the static pressure in a ventilation duct. One control is a constant I·RPM control, which is primarily used in a low static pressure range. Another control is a constant RPM control, which is primarily used in a high static pressure range. These controls requires neither a static pressure sensor nor an airflow rate sensor to accomplish substantially constant airflow rate while static pressure changes. This is because these controls use only intrinsic control variables which are electric current and rotational speed of the motor. Also, the method improves the accuracy of the control by correcting certain deviations that are caused by the motor's current-RPM characteristics. To compensate the deviation, the method adopts a test operation in a minimum static pressure condition.

Abstract: A projector includes: a drive motor adapted to drive a lens unit; a control section adapted to control the drive motor; a storage section adapted to store a target position of the lens unit; and a position detector adapted to detect a present position of the lens unit, wherein if a deviation between the target position stored in the storage section and the present position detected by the position detector is equal to or larger than a predetermined value, the control section performs drive of the drive motor with feedforward control until the present position and the target position are coincident with each other, and performs drive control of the drive motor with a predetermined unit based on a deviation between a stop position by the feedforward control and the target position.

Abstract: A motor drive circuit includes a first amplifier circuit to amplify a difference between first and second position detection signals with a gain becoming smaller according to drop in power supply voltage, to output a first amplification signal, the first and second position detection signals being signals indicating a rotational position of a rotor in a motor, having a frequency corresponding to a rotation speed of the motor, and being opposite in phase to each other; a second amplifier circuit to amplify the difference between the first and second position detection signals with the gain, to output a second amplification signal opposite in phase to the first amplification signal; and a drive circuit to amplify the difference between the first amplification signal and the second amplification signal with a predetermined gain to be saturated at the power supply voltage, to output a driving voltage for driving the motor.

Abstract: A driving mechanism comprises a fixed housing, a movable housing on which an object to be driven is mounted and a driving motor which is operative to drive the movable housing to move linearly as well as to rotate relative to the fixed housing. An inductance-type encoder determines both linear and rotary displacement of the movable housing relative to the fixed housing, whereby to provide closed-loop control of the position of the object in both linear and rotary directions.

Abstract: A driving mechanism comprises a fixed housing, a movable housing on which an object to be driven is mounted and a driving motor which is operative to drive the movable housing to move linearly as well as to rotate relative to the fixed housing. An inductance-type encoder determines both linear and rotary displacement of the movable housing relative to the fixed housing, whereby to provide closed-loop control of the position of the object in both linear and rotary directions.

Abstract: In a device, such as measuring or control signal transmitter, generating an analog current or voltage output signal, absolute values of output variables are continuously measured and regulated to ensure the correctness of the signal. The actual current or voltage value of an analog output signal is measured and digitized (206), a difference (e) between the digitized actual current or voltage value and the desired current or voltage value is defined (300), and the generation (200, 202, 204, 205) of the analog output signal is controlled (304) by means of a digital control signal (Enable, Direction) so as to decrease the difference.

Abstract: A trajectory display device capable of correctly quantifying an error of a three-dimensional trajectory of a machine tool, and displaying or outputting the error. The trajectory display device has a command line segment defining part adapted to define a command line segment which connects two temporally adjacent points, in relation to each commanded position; an error calculating part adapted to define a normal line extending from the actual position to each command line segment and calculate an error of the actual position relative to a commanded trajectory, the error being determined as a shorter one between a length of a shortest normal line among the defined normal lines and a length of a line segment extending from the actual position to a commanded position which is the nearest from the actual position.

Abstract: A servomotor control circuit for an air conditioner apparatus of a vehicle includes a drive control section for controlling drive of a servomotor so that the servomotor attains a target stop position, a rotation position change detection section for detecting a change in the rotation position of the servomotor, and an operation limit check section for checking, based on the change in the rotation position of the servomotor, whether the servomotor has attained the operation limit position. The drive control section stops drive of the servomotor without reception of a servomotor drive stop command produced from a main control apparatus, when the servomotor is determined as having attained the operation limit position.