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7609023 |
Control apparatus for electric vehicles
In electric vehicle control, system voltage stabilization control is executed to reduce the difference between a target value and detected value of a system voltage generated by a voltage boosting...
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7583049 |
Sensorless control systems and methods for permanent magnet rotating machines
Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a...
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7560889 |
Digital servo system with moving average filter
The invention relates to a method and an arrangement for a digital servo system with moving average filter (Amovavf 1, Amovavf 2),which is used as an input filter for a digital signal processor of...
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7342379 |
Sensorless control systems and methods for permanent magnet rotating machines
Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a...
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7243058 |
Method and circuit for operating a voice coil actuator of a mass data storage device
A circuit ( 90 ) and method are presented to accurately determine a BEMF voltage of a VCM coil ( 20 ) after termination of a driving current in a first current direction in the coil ( 20 ). The...
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7183738 |
Motor control device
A speed control means 7 for outputting a drive command signal for a motor 1 to make the speed of the motor 1 conform to the speed command signal based on a signal indicating the difference...
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7181294 |
Vibration control device
A control device for controlling the motion of a movable part in a machine while suppressing vibration generated in the movable part. The control device includes a state-variable estimating section...
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7061202 |
Automobile servomotor controller
An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which...
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7015670 |
Method of controlling a high-friction electro-mechanical servo-mechanism to minimize the power needed to hold a loaded output member
The invention provides a method for controlling an electromechanical servomechanism ( 20 ) for moving an output member relative to a variable load ( 38 ). The servomechanism includes: a motor ( 37...
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6998810 |
Position controller of feed shaft
A position controller for controlling a position of a feed shaft of a machine having a motor and the feed shaft driven by the motor is provided. A subtractor calculates a difference between a speed...
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6940248 |
Motion controlling
Motion controlling includes a combining network having an acceleration input for receiving an acceleration signal representative of acceleration of a movable element and a position input for...
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6936990 |
Method for controlling electric motor and apparatus for controlling the same
An apparatus and method for controlling an electric motor is disclosed. The apparatus includes an instruction inputting section for transmitting an instruction for an electric motor or a control...
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6903529 |
Method and apparatus for damping mechanical oscillations of a shaft in machine tools, manufacturing machines and robots
Damping of mechanical oscillation in a shaft that is provided by feedback wherein the output signals of multiple feedback devices are negatively coupled and added to a desired speed signal of a...
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6876168 |
Disturbance attenuation in a precision servomechanism by a frequency-separated acceleration soft sensor
In servomechanisms, like for example used in disk drives, disturbances, for example, friction, shock and vibration, prevent the system positioning accuracy from further improvement. These...
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6832127 |
Motor controller
A motor controller comprising a machine system ( 12 ) having a load machine ( 1 ), a transmission mechanism ( 2 ) for transmitting power, and a motor for driving the load machine through the...
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6831438 |
Method and apparatus for controlling DC motor
Controlling a direct current motor driving an object by determining, if the object does not reach a target position, a reference velocity corresponding to a point of time from a predetermined...
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6801010 |
Vibration suppression positioning controller
To provide a vibration-damping positioning controller capable of effecting stable positioning operation within a short period of time. The vibration-damping positioning controller has an...
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6774598 |
Method and circuitry for producing nominal position values for a closed loop position control of a numerically continuous-path controlled machine
A method for generating nominal position values for a position control loop of a numerically continuous-path controlled machine. The method includes presetting nominal position values with a...
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6762580 |
Electric motor velocity controller
A device for controlling the velocity of an electric motor is provided. The device combines a traditional PI (Proportional+Integral) velocity controller with a robust mapping technique that...
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6756762 |
Method and actuation control for stopping an electrical drive, by means of closed-loop position control, in a predetermined nominal position
The invention reduces the oscillation of the rotation speed regulator when stationary—despite low position resolution and a high minimum rotation speed resulting from this—by switching the...
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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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6669323 |
Mechanical deflection estimation for ink-jet service station motion servo
Resting position error recognition for an ink-jet, translational-type, service station mechanism. Service station drive mechanism binding due to hard stop impact is compensated for by calculating a...
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6614613 |
Phase technique for active damping in a servo-controlled actuator
An active control mechanism and method for stabilizing a servo-controlled actuator system such as an actuator system in a data recording disk drive by compensating the vibrational modes of the...
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6605920 |
Method and apparatus for large motor control
Apparatus and method for providing digital signal processing method for controlling the speed and phase of a motor involves inputting a reference signal having a frequency and relative phase...
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6515442 |
Position controller
To overcome the problem of a low frequency disturbance causing minute vibrations affecting response attributable to the difficulty of adaption to the phase of the vibrations, the present invention...
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6424105 |
Real-time control of feedback signals to a motor for optimum performance
An electric motor that may be used in a remote location, such as in a wellbore for pumping production fluids. The electric motor is designed to permit real-time adjustment of the position feedback...
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6360143 |
Error recovery methods for controlling robotic systems
A method of controlling a dispensing system, having a robot that moves along a motion segment and applies a material to a workpiece, automatically determines a backup distance for the robot after...
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6313591 |
Delay time modeling filter for cascaded regulator structure
A control system controls the movement of an object based on desired position data. The control system includes a first regulator configured to regulate the position of the object, a feed forward...
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6211638 |
Method and apparatus for linearizing control of a reluctance force motor
A hard disk drive system (10) includes a rotating magnetic disk (13), an arm (16) moved by a voice coil motor (18), and a read/write head (21) movably supported on the arm by a microactuator (22)....
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6191513 |
Stator-controlled magnetic bearing
A magnetic bearing wherein a stator is magnetically interacted with a rotor and is movable in response to feed-back of rotor position to thereby use the magnetic interaction between the stator and...
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6144179 |
Method for establishing the rotational speed of mechanically commutated d.c. motors
The method for determining the rotational speed and/or the angle of rotation of mechanically commutated d.c. motors from the variation with respect to time of the ripple of the motor current...
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6137255 |
Apparatus and method of controlling a linear motor door operator
A control system (10) for a door operator (12) for moving a door includes a position sensor (54) to be coupled to the door (28) for sensing the position of the door and generating a position...
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6127795 |
Transmitting process information for regulating drives
For regulating drives, process information is transmitted from a measuring device to a regulating device. In addition to position-measurement signals, acceleration-measurement signals are also...
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6114825 |
Method and apparatus for state path generation in a controlled system
Control of time-dependent states, such motion, is facilitated in a manner that avoids explicit solution to the governing equations, but which permits specification of both an initial and a final...
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6069463 |
Controller of multi-axis robot
A controller is provided for a multi-axis robot having at least first and second axis assemblies, the first and second axis assemblies each having an arm, a servomotor driven by a control input and...
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6064540 |
Active control for stabilizing a servo-controlled actuator system
An active control mechanism and method for stabilizing a servo-controlled actuator system such as an actuator system in a data recording disk drive by compensating the vibrational modes of the...
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6040673 |
Motor control apparatus
A motor control apparatus supplies a current to the motor according to the control either by an average current controller or by an instantaneous current controller. The selection of the controller...
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6037736 |
Apparatus for determination of control constant
A control constant identification system which comprises a command generation section for generating a speed command Vref, a speed control section for determining a torque command Tref by the speed...
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6002230 |
Winding drum drive of a cheese-producing textile machine
In the course of regulating an electronically commutated d.c. motor as the drive motor of a winding device of a textile machine, the resolution of known angular rotation sensing systems is...
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5998954 |
Electrical actuator with a refined cascade control unit
Electrical actuator having a stator body and a rotor body which is pivotable iN the stator body through an angle of rotation. The actuator further comprises energizing means for exerting an...
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5986424 |
Control system and control method
A control system which comprises a reduction gear unit containing gears, a motor being disposed on an input side of said reduction gear unit, a sensor for detecting a turning angle of said motor,...
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5982130 |
Calibration technique to remove series resistance errors in the sensed back EMF of a motor
A motor controller controls a motor's rotational speed using sensed back electromagnetic force (back EMF) of the motor. The sensed back EMF is presumed to contain an error component caused by...
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5942868 |
Speed and phase controller for motor and video cassette recorder having same
A speed and phase controller for a motor includes detecting and servo system for detecting a speed and a phase of the motor and for outputting a speed and phase control signal corresponding to the...
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5789838 |
Three-axis force actuator for a magnetic bearing
This invention features a three-axis force actuator that axially, radially and rotatably supports a bearing member for frictionless rotation about an axis of rotation generally coincident with a...
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5783923 |
Method and apparatus for multiple-input, multiple output feedback control of variable load systems
In a feedback control system with multivariable inputs and outputs, a network of plant actuators, each controlled by self-adaptive feedback control loops with pole-tracking zeroes, is provided as a...
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5745362 |
Digital PID control apparatus
In the digital PID (P:proportional, I:integral, D:derivative) control apparatus of the present invention, in which a deviation is obtained from a controlling amount of an object to be controlled,...
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5691616 |
Fully-closed-loop servomotor control system
A first integrated position deviation between a move command and an actual position of a servomotor and a second integrated position deviation between the move command and an actual position of a...
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5666014 |
Velocity-controlled magnetic bearings
The invention is an actively controlled radial magnetic bearing using inexpensive and rugged search coils as sensors instead of costly and delicate displacement or position sensors. It involves a...
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5656908 |
Negative coefficient filter for use with AC motors
A method and apparatus to be used with the motor controller for reducing phase shift between the feedback signal and the correction signal. Wherein the feedback signal is compared by the controller...
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5652490 |
Control system for glassware forming machine
A control system for controlling displacement of a member in a glassware forming machine. A pneumatic piston drives the member and is controlled by a computer which defines a motion profile. The...
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