|
Match
|
Document |
Document Title |
|
|
7560888 |
Electromechanical actuator including redundant, dissimilar position feedback
A relatively small, lightweight actuator includes a plurality of motors, an actuation element, a translation member, and a plurality of position sensors. The motors each supply a drive force to the...
|
|
|
7538453 |
Fan power supply system
A fan power supply system having a pair of voltage supplies, one producing a higher voltage than the other. A switch selects one of the voltage supplies in response to a control signal. A DC/DC...
|
|
|
7446497 |
Fixed-position stop control apparatus for rotation shaft
A fixed-position stop control apparatus ( 10 ) includes: a move-instruction generating means ( 22 ) for generating a move instruction for each control cycle; a position loop control means ( 25 )...
|
|
|
7420349 |
Microcontroller interface with hall element
A device controller system incorporates an inexpensive Hall element to detect motion of a brushless DC motor. A magnet, which is part of a motor rotor, passes by the Hall element producing a Hall...
|
|
|
7227328 |
Method for detecting a possible collision of at least two objects moving with respect to each other
A method is for detecting a possible collision of at least two objects moving with respect to each other by simulating the intended relative motion of the two objects. At least one of the objects...
|
|
|
7102316 |
Mechanical press
In a press having a plunger supported so as to be movable linearly back and forth by drive means which include at least one servomotor in combination with a rotatably supported inertia structure...
|
|
|
7057364 |
Actuation system comprising a digital position sensor
An actuating system having an electric motor that is controlled by a computer as a function of a setpoint position of a member that is to be actuated. The actuating system includes an encoder that...
|
|
|
7005821 |
Servomotor controller
In a servomotor controller, when a comparing circuit ( 70 ) detects that a position of an object to be controlled has been achieved to a target position, an operation inhibiting signal generating...
|
|
|
6838849 |
Serially connected double-phase full-wave brushless dc motor
A serially connected double-phase full-wave brushless dc motor includes a first drive member, a second drive member, a first sensor member, a second sensor member, a first motor coil and a second...
|
|
|
6791293 |
Sensorless control device for synchronous electric motor
The invention provides a synchronous motor sensorless controller which drives a synchronous motor without use of a rotational position sensor. The controller has a relative position counter 4 ...
|
|
|
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...
|
|
|
6727669 |
Motor-driven power steering apparatus
A motor-driven power steering apparatus includes a motor for generating assisting force to be imparted to a steering mechanism, a control signal generation section for generating a motor control...
|
|
|
6707269 |
Motor control circuit with adaptive dynamic range selection
Method and apparatus for controlling a motor. A digital to analog converter (DAC) converts input digital values to corresponding analog voltages over a range of different selectable dynamic...
|
|
|
6683437 |
Current controlled motor amplifier system
Aspects of a current controlled motor amplifier system are provided. These aspects include a current source motor amplifier comprising current source means on each leg of a top half of the H bridge...
|
|
|
6677721 |
Method of control and control structure for the movement control, pre-control and fine interpolation of objects in a speed controller clock which is faster than the position controller clock
The invention makes it possible to execute the pre-control and the fine interpolation in the drive (A) in the fast drive clock (tDR) with a slower path pre-setting in the clock (tNC) of the NC. For...
|
|
|
6597142 |
Apparatus and method for setting control parameters of machining apparatus
An apparatus for setting control parameters of a machining apparatus. The setting apparatus includes a storage unit for storing a set of control parameters for each of a plurality of machining...
|
|
|
6304077 |
Method and apparatus for defining the position of an actuator utilizing parts of pulse intervals
The invention relates to a method and an apparatus for defining the position of an actuator. The position of the actuator (1) is measured by a measuring signal (3) proportional to the rotation of a...
|
|
|
6281652 |
Method of using two low-resolution DACS for converting high-resolution digital demands into analog output signals that monotonically drive an actuator motor in a disk drive
Disclosed is a method in a disk drive that allows the functionality of a single high-resolution DAC to be replicated with a pair of lower-resolution DACs that are operated in a unique manner that...
|
|
|
6262552 |
Method of positioning an actuator
The invention relates to a method for positioning an actuator. In the method, the actuator is controlled by a continuous control pulse (2a) toward a desired value (1), and the position of the...
|
|
|
6066929 |
Frequency generator circuit for a brushless DC motor control system
A brushless direct current motor driving circuit includes a data generator adapted to receive a first signal corresponding to a rotor position and to generate a digital data signal therefrom, a...
|
|
|
6013996 |
Precision stop control for motors
An improved stop control system and method are provided for a motor having a drive mechanism in which the motor is coupled to a motor controller that controls the speed and position of the drive...
|
|
|
5625310 |
Signal processing apparatus and displacement detecting apparatus using the same
A signal processing apparatus is provided for processing first and second periodic analog signals having the same period and having a fixed phase relationship therebetween. The apparatus includes...
|
|
|
5583409 |
Numerical control apparatus and method for controlling a machine
A numerical control apparatus allows a portion of a prototype or the like to be easily machined without an operator being concerned with a coordinate system, origins, and other data. A guidance...
|
|
|
5543697 |
Circuit and method for controlling the speed of a motor
A method and circuit for implementing a frequency lock loop circuit in a disk drive is disclosed. The circuit includes the motor control elements of a direct current motor plus a coarse counter, a...
|
|
|
5543696 |
Position control for hybrid servomechanisms
A hybrid servomechanism includes a speed control, a rotor position control and a brushless motor. When enabled, the position control commands a stationary stator mmf vector, allowing the motor's...
|
|
|
5519297 |
Spindle positioning method
A spindle positioning method for high-speed positioning of a spindle by making the best use of the decelerating capability of a spindle motor. When a fixed-position stop command is generated while...
|
|
|
5289095 |
Fuzzy switching logic for servo systems
An actuator'rate is controlled by a rate servo and the actuator's position is controlled by a position control. The position control can be a position servo or a mechanical brake. Selection of...
|
|
|
5260631 |
Spindle position/speed control unit
The invention relates to a spindle speed/position control system for use in a numerically controlled machine tool such as a lathe. To improve the measurement of spindle speed and position, detected...
|
|
|
5241249 |
Process for controlling a robot arm by defining substitution paths
A process for controlling a robot arm having a certain number of articulations or joints (A to F), which can abut. Substitution paths are automatically defined by calculation or by the choice of...
|
|
|
5204932 |
Servo circuit for magnetic disk apparatus
A servo circuit for a magnetic disk apparatus includes a target speed generating circuit which generates a target speed in accordance with an amount of movement. A speed signal producing circuit...
|
|
|
5194798 |
Servo circuit control method and system
A control system for a servo circuit has a speed control unit for controlling the speed of a servo object, a position control unit for controlling the position of the servo object, a switching unit...
|
|
|
5194788 |
Servo circuit
A servo circuit having a speed detection circuit for detecting a real speed from a position signal from an object under servo control. A speed error detection circuit generates an error between a...
|
|
|
5173647 |
Servo positioning circuit
A servo positioning circuit having a speed detection circuit for detecting a real speed from a position signal from a servo object; a speed error detection circuit for generating an error between a...
|
|
|
5136226 |
Correlated coarse position error processor
A technique for overcoming the difficulties that arise from the transition between coarse and fine loop control. Coarse and fine phase locked loops, each having a respective latch provide a coarse...
|
|
|
5119004 |
Reference-point return method
The invention relates to a reference-point return method for returning a movable element of a machine to a reference point using solely a linear scale, without relying upon a limit switch. The...
|
|
|
5070288 |
Reference point return system
A system for carrying out reference point return in a numerical control device is provided, including a deceleration dog having a short length and arranged at a machine table, a deceleration limit...
|
|
|
5051674 |
Apparatus for preventing an overrun of a spindle motor
A spindle motor controlling apparatus having a motor driving device, a motor speed controlling device, a MICOM and an image processing device uses a horizontal synchronization comparing device...
|
|
|
5030901 |
Position control method
In a position control system having force as a manipulated variable and position as a controlled variable, negative feedback of position and velocity is performed. Positive feedback of acceleration...
|
|
|
5027044 |
Load state decision apparatus for servomotor
A load state decision apparatus of a servomotor where a load current value of a servomotor during operation is sampled and compared with a prescribed value and then the load state is decided based...
|
|
|
5015932 |
Actuator driving circuits
An actuator driving circuit for a servocontrol system comprises an amplifier for amplifying an error signal obtained in the servocontrol system to produce a driving signal supplied to the actuator,...
|
|
|
5013986 |
Actuating drive for positioning a rotary element
A rotary element (10) such as a robot arm is to be positioned by an actuating drive to a position determined by a desired value signal. An angle pick-off (20) provides an actual value signal. A...
|
|
|
5003238 |
Method and apparatus of fine tuning the position of an ultrasonic sensor probe using analog motor position signals
As disclosed herein, a new and improved method and apparatus provide for fine tuning the position of a servomotor used to drive a transducer mounted on an ultrasound probe to a desired position....
|
|
|
5001409 |
Surface metrological apparatus
In an apparatus for measuring texture and characterization of the surface of a sample on the basis of the drive signal of a servo control circuit by allowing a probe-tip (1) to approach the sample...
|
|
|
4992716 |
Motor control with digital feedback
A motor feedback control system which in addition to a quantized digital position feedback value, uses a feedback signal which represents the error between the actual motor position and the...
|
|
|
4988932 |
Constant velocity servosystem wtih high positional accuracy
The present servosystem positions a movable member such as an optical head over a rotating disk with a constant velocity and high positional accuracy by utilizing a fast analog feedback loop that...
|
|
|
4982145 |
Method and apparatus for the optimization of thyristor power supply transport time delay
A digital current control arrangement for optimizing the transport time delay of a thyristor power supply used as a source of armature current for a DC motor utilizes a coarse gate angle interrupt...
|
|
|
4977361 |
X-Y addressable workpiece positioner and mask aligner using same
In an X-Y addressable workpiece positioner the workpiece to be positioned, such as a semiconductive wafer to be aligned with a mask image, is coupled to move with a work stage moveable in X and Y...
|
|
|
4972131 |
Method of an apparatus for controlling velocity of industrial robot
A method of and apparatus for controlling the velocity of an industrial robot where the velocity is controlled without producing an edge when an instruction velocity is higher than an allowable...
|
|
|
4959797 |
System for tightening threaded fastener assemblies
A threaded fastener assembly tool is affixed to the output shaft of a DC motor, the torque of which is controlled by the current through the windings. An angular position encoder is attached to the...
|
|
|
4937510 |
Control apparatus for a linear motor for driving a pickup
A control apparatus for a linear motor for driving a pickup of an information storage/readout apparatus with which the pickup can be moved more quickly and accurately to a desired target position....
|