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5610487 |
Servo system with once per revolution rejection
A servo system for controlling the position of a read/write head over a rotating data disk is disclosed. The servo system includes the addition of a compensation scheme to the feedback loop that...
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5598304 |
Fuzzy controller for an actuator and the controlling method thereof
A fuzzy controller controls a track seeking operation and a track following operation for an actuator in accordance with a position error between a present position value and a reference value....
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5587636 |
Observer-compensator for an electric motor system
In a motor system controlled by a central processing unit, an observer-compensator is provided which modifies the command signal being applied to the actual motor system to be controlled. The...
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5559412 |
Actuator having electronically controllable tactile responsiveness
An actuator having electronically controllable tactile responsiveness which is flexibly programmable to facilitate provision in a single actuator of torque-position characteristics, such as a...
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5548192 |
Adaptive feedback system for controlling head/arm position in a disk drive
A method for adjusting a compensator in a feedback control system for a coupled plant, derives a plurality of forward error values from position error signals that are sensed as outputs from the...
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5497059 |
Control method and apparatus for a servo- mechanism
A servo-mechanism control system calculates an operation value to be applied to a control object from a desired value of a control output and a detected control output of the control object, and...
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5495158 |
Apparatus and method used with AC motors for controlling motor operation
A method and apparatus for motor control tuning wherein an extremely accurate estimate of inertia is determined by using the second derivative of a desired motor velocity and the torque supplied to...
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5491395 |
TUT servo IC architecture
An integrated servo circuit that controls the spin motor and voice coil motor of a hard disk drive in response to digital commands that are generated by a microprocessor based controller chip. The...
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5489829 |
Parameter identifier
A parameter identifier which estimates parameters of a plant includes a model, a subtracter, a delay circuit, and a parameter adaptive mechanism. Disturbances are assumed to be represented by an...
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5486744 |
Servo device for spindle motor
A servo device for servo controlling a spindle motor according to the invention, comprising: a unit for generating a signal with at least two cycles during one full rotation of a rotator in the...
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5486745 |
Method and apparatus for synchronizing system operations using a programmable element
A method and apparatus for synchronizing the operation of multiple elements of a system to the motion of a movable element using a programmable element as the control element.
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5486957 |
Disk drive with rectifier circuit for parking the head carriers on power down
A magnetic recording disk drive has a rectifier circuit made up of bipolar transistors. Upon removal of power to the spindle motor, the rectifier circuit converts AC spindle motor output to DC...
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5485367 |
Process control apparatus
A set point value SV(s) and a process value PV(s) are supplied to a deviation arithmetic operation circuit, and thereby a deviation E(s) is obtained. The deviation E(s) is input to a control...
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5483439 |
Digital servo control system
In a digital closed loop servo control system, state variables of a plant are input to an inverse system having an opposite characteristic to an internal model, and the output of the inverse system...
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5473238 |
Disc drive power management system
A disc drive circuit includes a pair of DC busses across which are directly connected a disc actuator power amplifier and a three phase spindle motor power amplifier which may be comprised of three...
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5473235 |
Moment cell counterbalance for active hand controller
An active hand controller system includes a moment cell for generating a signal representative of the force or torque applied to the stick of the hand controller by a user. The moment cell has an...
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5465034 |
Low acoustic noise seeking method and apparatus
A silent seek servo controller is used in a low profile miniature disk drive to minimize acoustic noise and the problems associated therewith. The silent seek servo controller of this invention...
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5465035 |
Band limited control of a flexible structure using piecewise trigonometric input signals
A method and apparatus for moving a member provides parameters related to a given destination position of the member and corresponding to a switch time, a final time, an acceleration amplitude, and...
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5459383 |
Robust active damping control system
Methods and apparatus for providing improved gain and bandwidth and robust damping of mechanical resonances for a servo control system by providing a collocated or nearly collocated feedback loop...
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5453925 |
System and method for automatically tuning a process controller
A system and method for automatically tuning a process controller used to control an industrial process, or the like. The controller is removed from closed-loop control of a process under control,...
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5450202 |
Adaptive resonant positioner having random access capability
A positioning system including a sensor 52, a drive control 54 and an actuator 56. Sensor 52 senses a mirror 64 position and provides actual position signals to drive controller 54, which...
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5446360 |
Method and apparatus for controlling single phase induction motor
A method and an apparatus for controlling a single phase induction motor. The method comprises the step of calculating an error between an ideal position signal from a reference model and a...
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5445040 |
Caging system
A caging system for a magnetized rotor of a gyro. A capacitive detector dcts amounts of linear deflection of the rotor, from an upright position, over time. A computer calculates the linear...
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5444612 |
Adaptive PI control system
An adaptive proportional-plus-integral control system for controlling a robot or a machine tool which is subject to large load variation. The PI control system comprises a speed control loop and a...
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5440213 |
Collision detecting method using an observer
A collision detecting method for quickly securely detecting a collision between a driven body driven by a servomotor and an obstacle by using an observer, thereby preventing machine components from...
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5432419 |
Recording medium library system
A recording medium library system retaining up to a predetermined number of cartridge type recording media for recording/reproducing data on the recording medium is disclosed. The recording media...
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5418440 |
Position control device for servomotor
A position control device for a servomotor in use of a NC machine tool, a robot or the like detects a case that a control shaft is collided with something in error to stop the servomotor at a high...
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5406181 |
Drive signal generating device
A drive signal generating device for outputting a pulse signal to a spindle motor for driving a magnetic disk, to thereby rotate the motor in accordance with the pulse signal. The rotational speed...
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5402048 |
Nodding scanner
A limited rotation assembly for an optical scanner. This assembly includes an input command unit and a signal generator and an electronic driver and a summing junction and a torquer connected in...
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5394071 |
Control network with on-line iteration and adaptive filter
A feedback control system modifies a drive signal to a plant which provides an achieved response signal in response to the drive signal. A first summing element provides a response error signal...
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5392607 |
Stirling-cycle cyrogenic cooler using adaptive feedforward vibration control
A Stirling-cycle cryogenic cooler that employs a vibration control procedure based on adaptive feedforward principles. The vibration control procedure is particularly adapted for use as a...
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5369345 |
Method and apparatus for adaptive control
Methods and apparatus for controlling a plant are described. The control methods are adaptive and compensate for changes in plant component characteristics and plant environment, and are applicable...
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5355065 |
Adaptive control system
A control system for a physical plant has a state output detector for detecting operating conditions of the physical plant. A trajectory production unit produces desired operating conditions of the...
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5355068 |
Mailing machine including shutter bar control system
A mailing machine base adapted to have a postage meter mounted thereon, wherein the meter has a postage printing drum and a drive gear therefor, and wherein the meter has a shutter bar movable in...
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5347447 |
Adaptive control system and method thereof
The basic state feedback gain is derived and selected by the on-line identification based on the on-line input/output data of a controlled object, and at the same time, the sensitivity of the state...
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5343131 |
Method and apparatus for self-synchronizing seek deceleration
During the deceleration portion of a seek operation, the current level provided to the actuator motor of a disk drive is based on a desired linear deceleration versus time profile that has been...
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5331263 |
Velocity control device
A velocity control device is disclosed having feedforward signal applied to a velocity servo loop. An actuator moves a laser beam spot to a desired track of an optical disk. A displacement of the...
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5327059 |
Tape drive capstan motor servo system with static friction compensation
A system and apparatus for startup and speed regulation of low-inertia capstan motors under circumstances where the capstan load during startup may vary widely. A stiction handler provides dynamic...
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5327057 |
Method of generating robot control axis position data
The present invention relates to a method of generating data indicative of robot control axis position. The method has a step of inputting data specifying the shape of a workpiece (WK) and data...
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5325028 |
System and method for magnetic tape leader block extraction
A system and method for controlling an amount of force supplied by a motor to move an object from an at-rest position is presented. The system comprises a motor controller configured to provide a...
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5325029 |
Method of controlling an automated mechanical transmission shift mechanism
For use with an automated mechanical transmission system including an electrically actuated shift mechanism having a motor, a method of controlling the shift mechanism is provided for shifting the...
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5325026 |
Microprocessor-based commutator for electronically commutated motors
A commutator for an electronically commutated machine provides a microprocessor-based mechanism for translating discrete samples of machine angular rotor position information, either measured or...
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5315222 |
Control apparatus for industrial robot
An apparatus is provided for controlling an industrial robot of the type which holds a workpiece for movement relative to a fixed tool or a series of fixed tools. The robot control apparatus...
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5306995 |
Reconfiguration automatic electronic control system with automatic model determination, internally restructurable control and flexible programmable test modes
A highly flexible electronic control system which is readily reconfigurable or reprogrammable to suit more than one machine, such as more than one laundry appliance. Control parameters are input to...
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5306993 |
System of driving by electric motor machines which work in a periodic manner at torque variable as a function of the angle of rotation
Machines having torques variable as a function of the angle of rotation such as piston driving mechanisms like compressors, cam driving mechanisms, printing machines and looms, are driven by an...
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5306994 |
Automatic phase margin compensation control circuit and method for disk drives
A control circuit optimizes the track seeking operation of a disk drive by automatically adjusting the phase margin of a compensator circuit that generates a control signal used to drive the...
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5305158 |
Positioning control apparatus
A positioning control apparatus comprises a feedback compensatory system and a feedforward compensatory system. The feedforward compensatory system comprises a detector for detecting a position of...
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5304905 |
Motor servo-system controller having comparison of detected current with model current integrations
To set the magnitude of the inertia of a motor and mechanical system or set gains suitable for the magnitude of vibrations of the motor and the mechanical system, the magnitude of a load inertia is...
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5294873 |
Kinematic functions for redundancy resolution using configuration control
The invention fulfills new goals for redundancy resolution based on manipulator dynamics and end-effector characteristics. These goals are accomplished by employing the recently developed...
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5289097 |
Spindle control method and apparatus for disk drive
A spindle motor control method and apparatus for spindle motor control are provided for use in a direct access storage device. A plurality of operational modes of the direct access storage device...
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