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6914404 |
Motor controller
A motor controller, comprising a first simulation control unit ( 8 ) and a second simulation control unit ( 9 ) as a feed forward control means for inputting a command to an actual control unit (...
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6907317 |
Hub for a modular intelligent assist system
An intelligent assist system having a modular architecture, coordinated by electronic communication links between the modules is provided. A multi-function hub for use in the assist system includes...
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6903897 |
Performance of a rotary actuator in a disk drive
A method for improving the performance of a rotary actuator in a disk drive, the rotary actuator comprises a voice coil motor (VCM) characterized by a torque parameter, the disk drive comprises a...
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6903528 |
Machine model estimating device of electric motor control apparatus
A machine model estimating device of an electric motor control apparatus having an electric motor for driving a load machine, a rotation detector for detecting a rotating angle of the electric...
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6903527 |
Servo controller
A switch is turned on by a learning control start command from a master control unit, and the positional deviation at respective cycles is read in. Correction data read out from a learning memory...
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6903530 |
Electric motor controller resonance frequency detection apparatus
A resonance frequency detector for an electric motor controller in which a resonance frequency can be measured at high speed by a simple calculation and the resonance frequency can be detected by...
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6879126 |
Method and system for positioning a movable body in a magnetic bearing system
A magnetic bearing system allows a movable body to be positioned to a point of substantial equilibrium in an axial direction after a system shutdown. A sensor measures the axial position of the...
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6876167 |
Method and apparatus for determining the rotational rate of a rotating device
A non-invasive apparatus and method for measuring the speed of a rotating device that includes a sensor that measures a dynamic characteristic of the rotating device. A sample of the signal is...
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6873132 |
Electric motor control device
Host control section 8 is provided with simulation model 8 c for simulating the signal transmission characteristics of an electric motor control device. Host control section 8 performs an...
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6870346 |
Method and apparatus for controlling acceleration and velocity of a stepper motor
A method and apparatus for controlling acceleration and velocity of a stepper motor in which a phase offset is selected depending on motor velocity. The optimal phase offset indicates the position...
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6861816 |
Positional control of a controlled object during movement initiation
In a positional control device for controlling a position of a controlled object using a motor, when generating a torque command value τc which serves as the command value for the servo motor of...
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6859001 |
Torque ripple and noise reduction by avoiding mechanical resonance for a brushless DC machine
A method of reducing torque ripple and noise for an brushless DC machine comprising: determining a control frequency for the electric machine, the control frequency indicative of an existing...
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6859007 |
Servo motor drive control device
Learning control is performed when carrying out processing by repeating instructions in a pattern cycle. Time/position converting means determines a positional deviation for a prescribed position...
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6859008 |
Method and apparatus for compensating for cable charging effects on control algorithms
A method and apparatus for use with a three phase AC motor controller linked to a three phase motor, the controller receiving a torque command signal and generating a voltage phase angle as a...
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6854560 |
Electric power steering apparatus
An electric power steering apparatus for performing steering assist. The apparatus is provided with an operation amount sensor for sensing an operation amount of an operation member for steering a...
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6853161 |
Recording apparatus, motor control apparatus, and motor control method
A motor control apparatus which can improve detection accuracy of control information and stabilize a control system includes a detector for detecting first pulse information which corresponds to...
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6828747 |
Electric actuator and method of controlling the same
The stop positions of start and end points for a slider are set by positionally adjusting a stopper and/or a stopper. The distance that the slider has traveled is learned according to a command...
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6826434 |
Computerized numerical control for a servomechanism
A computerized numerical control system is provided for controlling a servomechanism under the direction of a general-purpose computer system. The system implements in software a PID controller for...
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6825633 |
Method for adapting jerk profiles through jerk limitation for minimizing excitations of oscillations during movement of a machine element
The excitation of an oscillation in a mechanical system, such as a machine element, subjected to a jerk can be suppressed or at least attenuated by rounding a corresponding jerk curve and/or by...
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6822415 |
Motor controller
A electric motor control device is provided for controlling an electric motor which actuates a movable member of a machine through a transmitting mechanism. When a torque command is given as motion...
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6823235 |
Controller for machining gears
A gear machining controller capable of performing a gear machining of high precision. A gear machining tool and a workpiece are driven by a first motor and a second motor, respectively, to be...
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6812660 |
Apparatus for controlling brushless motor
An angle detector 25 sets a q-axis command current to a first magnetic pole detecting current Iq_p 1 and a second magnetic pole detecting current Iq 13 p 2, and performs a magnetic pole...
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6812668 |
Apparatus, method and program for controlling an electric motor
Apparatus, method and program for controlling electric motors to drive movable objects, wherein an input-rectifying device is operable, when a control signal to be applied to one of the electric...
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6813542 |
Modules for use in an integrated intelligent assist system
An intelligent assist system having a modular architecture, coordinated by electronic communication links between the modules. Modules for motion, computation, interface, and programming are...
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6812659 |
Apparatus for controlling brushless motor
An angle detector 25 detects a rotor angle θ of a DC brushless motor 1 using a current value Iu_s detected by a U-phase current sensor 23 and a current value Iw_s detected by a W-phase...
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6801011 |
Magnetic pole position estimating method and control apparatus for synchronous motor
The invention has an object to provide a magnetic pole position estimating method and a control apparatus for a synchronous motor which reliably detect the position of a magnetic pole of the...
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6781340 |
Method for detecting oscillation criticality of servo control system
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...
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6771037 |
Actuator and family of actuators for a seat and method of manufacturing such an actuator
The invention relates to an actuator ( 22 ) for a seat, of the type comprising, on the one hand, a body ( 40 ) and a control element ( 38 ) displaceable relative to the body ( 40 ), under the...
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6768283 |
Electric power steering control device
An electric power steering control device is provided, which comprises a vehicle speed detector, a steering torque detector, a steering shaft reaction torque meter, a motor speed detector, a motor...
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6768282 |
Method for detecting the rotational position of the drive shaft a dc motor
A method for determining the rotational position of the drive shaft of a DC motor includes providing a period of a reference current ripple indicative of proper operation of the motor. The period...
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6765360 |
Dynamic optimizing method for speed data and positioning device using this method
A dynamic optimization method for speed data, for compensating for a speed data maximum value and a minimum resolution that can be specified by users without depending on a speed pattern...
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6759825 |
Control method and control apparatus for feed system
The invention concerns a feed system control method and apparatus that can calculate an accurate backlash amount and can accomplish highly precise position control. Position errors are calculated...
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6741057 |
Servo controller for preventing downward displacement in gravitating axis
A servo controller capable of preventing downward displacement of a gravitating axis of a machine when an excitation of a servomotor for driving the gravitating axis is discontinued. When a...
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6741055 |
Positioning-controlling apparatus and positioning-controlling method, and part-mounting equipment and part-mounting method
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...
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6738691 |
Control handle for intelligent assist devices
A method and system for controlling an intelligent assist device, robot, or other powered system that is partially or fully directed by the intent of a human operator. The method and system...
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6734650 |
System and method for controlling an active magnetic bearing using continuous variable compensation
A system and method for controlling an active magnetic bearing assembly by varying the system control laws in a continuous non-linear fashion as a function of rotor rotational speed. The system...
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6713978 |
Method and system for determining induction motor speed
A non-linear, semi-parametric neural network-based adaptive filter is utilized to determine the dynamic speed of a rotating rotor within an induction motor, without the explicit use of a speed...
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6696813 |
Open-loop synchronizer for a slide out room
An open-loop system for synchronizing movement of a slide out room includes a pair of motors connected to extendable members which support the room during movement between an extended and a...
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6696809 |
Robot, servo circuit, actuator, robot control method, and actuator driving method
Based on a control object, a result of the detection of driving of an actuator and a response from a standard mathematical model of the actuator, the actuator is controlled, or in a servo system...
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6694214 |
Method and apparatus for weight compensation in guiding a movement of a moveable machine element
For a number of different operating points in a workspace of a processing machine, the total length changes caused by a weight force are determined and entered together with the corresponding set...
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6693399 |
Servo-control devices, in particular for an aircraft flight control actuator
The invention relates to a servo-control device comprising at least one servo-control loop which receives a servo-control signal as input and whose output acts on an element to be servo-controlled,...
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6686716 |
Tuned open-loop switched to closed-loop method for rapid point-to-point movement of a periodic motion control system
A motor control method and apparatus produce rapid, point-to-point movement while minimizing settling time and peak power consumption in a servo-control system with a periodic input. Rapid...
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6677722 |
Servo control method
The servo control method operates a set value of a first-order lag time constant of a feedback compensation by both a detected mechanical position value and a transfer function corresponding to a...
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6658324 |
Pick and place robot system
A plant is provided for rapid pick and place operations, enabling automated systems that return to at least one approximately fixed position to run faster than the rate of conventional systems. The...
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6650079 |
System and method to control planar motors
A method for controlling and positioning a two-dimensional electric motor is disclosed. The electric motor has a coil array and a magnet array. The method controls the motor in two directions in...
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6650078 |
Method and system for controlling mechanical systems exhibiting discontinuity in inertial loading
A technique is provided for adapting feedback control system performance to applications involving changing inertial loads. A modified gain profile is applied for a control system block that...
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6639374 |
Method and device for controlling DC servomotor for driving rotating load
A method of controlling a DC servomotor for driving a driven member coupled by a wire to an operation member of a valve, wherein, at the start of a control, the motor is driven first to rotate the...
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6633149 |
Method for digital control of a universal motor, in particular for electrical household appliances
The invention concerns a method for digital control of a universal motor, in particular for electrical household appliance, comprising steps which consist on: measuring said engine ( 21 ) rotation...
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6614197 |
Odd harmonics reduction of phase angle controlled loads
The present invention relates generally to the reduction of odd harmonics of phase angle controlled loads. One embodiment relates to an apparatus for reducing odd harmonic currents introduced into...
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6611123 |
Servo control apparatus and gain adjusting method
A disk apparatus includes a DSP (digital signal processor), and a DSP core of the DSP receives a feedback input from a pick-up, and generates a focus control pulse and a tracking control pulse....
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