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| Number | Title | Issue Date |
| 8415913 | Control circuit and control method for motor A control circuit generates a driving signal indicating an actuator torque. A first operation unit generates position, speed, and acceleration signals, based upon a detection signal indicating the actuator mover state. A second operation unit generates a first diffe... | 04/09/2013 |
| 8415912 | Machine motion control system An exemplary embodiment of machine motion control system for testing electronic devices includes a machine and a control module electrically connected to the machine. The machine secures the electronic devices and includes a sensing unit and a servo unit, the sensin... | 04/09/2013 |
| 8395341 | Repetitive error correction method for disk-drive spindle motor control systems Methods, systems and computer program products for compensating repeatable timing variations associated with a spindle motor are described. Specifically, a repetitive error correction factor may be determined using a computational model which predicts timing variati... | 03/12/2013 |
| 8390233 | High resolution flexural stage for in-plane position and out-of-plane pitch/roll alignment An adjustment structure used in conjunction with an imprinting structure is provided. The adjustment structure includes a sample mount for mounting a sample. An actuator mechanism is coupled to the sample mount, the actuator mechanism producing actuated forces on a ... | 03/05/2013 |
| 8384330 | Method of managing the steering control of an aircraft undercarriage The invention relates to a method of managing a steering control for a steerable portion of an aircraft undercarriage, the method comprising implementing servo-control to servo-control an electromechanical steering actuator on an angular position setpoint, wherein, ... | 02/26/2013 |
| 8334668 | Machine motion control system A machine motion control system includes a number of moving parts for securing test electronic devices, a machine and an axis control card mounted on the machine. The machine includes a number of servo modules and a number of sensing units. The servo modules drive a... | 12/18/2012 |
| 8258729 | Down sampling method for hard disk speed control loop Systems, methods and computer program products for removing speed adjustment errors attributed by pole asymmetry are described. In some implementations, the spindle motor speed can be down sampled. Down sampling the spindle motor speed can include determining the sp... | 09/04/2012 |
| 8253367 | Control apparatus, control method, and control program for elastic actuator drive mechanism An abnormality determination unit that determines whether or not an output measurement unit is abnormal is provided, and whether or not the output measurement unit is abnormal is determined. When the output measurement unit is abnormal, an elastic actuator is contro... | 08/28/2012 |
| 8237388 | Manipulator and control method therefor A manipulator has a working unit including an end effector and a posture axis for changing the orientation of the manipulator, a compound mechanism provided on the working unit, and a controller for actuating a gripper axis, a yaw axis, and a roll axis by respective... | 08/07/2012 |
| 8212510 | Fiber optically communicated motor temperature and position signals Methods and apparatus are provided for a controlling an electric motor that is at least partially disposed within a motor housing. The rotational speed and position of the electric motor are sensed, and a temperature of the electric motor is sensed. The sensor signa... | 07/03/2012 |
| 8188697 | Apparatus and method for driving a motor A sampling circuit samples, while running a motor at a predetermined rotational speed, over a predetermined period a back electro-motive force induced at one end of at least one phase coil, with one end of each phase coil of the motor being brought to a high impedan... | 05/29/2012 |
| 8098038 | Servomotor control system enabling high-speed oscillating motion to be highly precise A servomotor control system that includes a numerical control unit and servo control unit enables the use of learning control based on an angle synchronization method in high-speed oscillating motion performed by, for example, a jig grinder. The numerical control un... | 01/17/2012 |
| 8093853 | Device-positioning pedestal and handler having the device-positioning pedestal A device-positioning pedestal capable of positioning devices of different sizes. The device-positioning pedestal comprises a plurality of guide members corresponding to the sides of the device and coming in contact with the sides of the device to position the device... | 01/10/2012 |
| 8067916 | Power cutting tool with synchronized dust control device A cutting tool such as a miter saw, arranged to have an arrangement for selectively making and breaking power of a first circuit and an independent second second circuit each connected respectively to a first motor operating the cutting tool and to a second motor op... | 11/29/2011 |
| 8049454 | Rough and fine movement device, and liquid supply device incorporating the same A rough and fine movement device capable of moving a mobile body with high accuracy, and a liquid supply device incorporating such a device. First and second mobile bodies are movable along guide members with a connection member connecting the mobile bodies in a rel... | 11/01/2011 |
| 7973508 | Automation systems diagnostics and predictive failure detection The present invention discloses a system and method for monitoring and diagnosing a robot mechanism. This requires adding intelligence to the diagnostics by parameters of physical robot arm linkages respecting component relative rotation or load transfer; storing ro... | 07/05/2011 |
| 7932689 | Motor drive system for driving motor provided with a plurality of windings A motor drive system is provided with a plurality of axis control parts for outputting PWM commands using a position command, a plurality of current supply parts which supply current to the respective windings based on the PWM commands of the respective axis control... | 04/26/2011 |
| 7915848 | Servo control apparatus that performs dual-position feedback control A servo control apparatus that performs dual-position feedback control and thereby achieves a reduction in position error according to the purpose of machining. The servo control apparatus includes: a first position detector for detecting the position of a motor; a ... | 03/29/2011 |
| 7893642 | Driving apparatus A driving apparatus (100p, 100s) is provided with: a base portion (110); a stage portion (130) on which a driven object (12) is mounted and which can be displaced; an elastic portion (120) which has elasticity ... | 02/22/2011 |
| 7888899 | Substrate splitting apparatus and a method for splitting a substrate A substrate splitting apparatus and a method for splitting a substrate using the substrate splitting apparatus are provided. The substrate splitting apparatus includes a servo motor, a transmission device, a substrate breaking bar, and a stage. One end of the transm... | 02/15/2011 |
| 7868575 | Aperture driving apparatus and projection type image display apparatus An aperture driving apparatus includes a swing unit and a stationary unit. The swing unit includes an aperture plate that partially blocks a light, a coil that constitute a voice coil motor for obtaining a driving force for driving the aperture driving plate, and a ... | 01/11/2011 |
| 7868574 | Motor absolute position signal processing apparatus A motor absolute position signal processing apparatus connected to a signal processor and an optical encoder of a motor control system includes first and second switches, a signal integration amplifier, first and second separators and an inverter. The first switch i... | 01/11/2011 |
| 7782003 | Positional indicia misplacement compensation Apparatus and method for compensating for positional indicia misplacements in the positioning of a control object, such as with servo seam misplacements on a data storage device storage medium. An actual position for the control object is determined in relation to a... | 08/24/2010 |
| 7772795 | Motor position signal processing apparatus A motor position signal processing apparatus electrically connected to a signal processor and an optical encoder of a motor control system includes a first switch, a second switch, a first signal integration amplifier, a first separator, a second signal integration ... | 08/10/2010 |
| 7719221 | Servo control apparatus A servo control apparatus includes a motor including a motor shaft, the motor for driving a drive subject; a detecting section that detects a rotation position of the motor shaft; and a control system configured to generate a motor torque command for the motor using... | 05/18/2010 |
| 7710059 | Method of optimizing servo controller power in two-dimensional flexure MEMS storage device A method of optimizing a servo controller power required in the operation of two-dimensional flexure (Microelectronic Memory Storage) MEMS devices. Furthermore, provided is an arrangement for optimizing servo controller power in a two-dimensional flexure MEMS storag... | 05/04/2010 |
| 7705552 | Robotic system A robotic system is provided that enables easy manipulation and various operations. A walking operation allocated to a manipulated switch operation section is performed. Meanwhile, the right ankle roll axis control motor, the left ankle roll axis control motor, righ... | 04/27/2010 |
| 7675256 | Controller for DC brushless motor integrated with a high voltage control system Taught herein is a controller for a direct current brushless motor connected to a high voltage control system, comprising a microprocessor and an input/output interface circuit connected between the high voltage control system and the microprocessor; wherein the inp... | 03/09/2010 |
| 7649330 | Low-power pulse-width-modulated retract of disk drive actuator A disk drive system including retract logic for control of the voice coil motor in a retract operation, in which the voice coil motor positions the read/write head actuator arm in a safe place in a loss-of-power event, is disclosed. The retract logic includes circui... | 01/19/2010 |
| 7638963 | Rotary indexing table driven by an induction motor The present invention is a rotary indexing table driven by an induction motor. The rotary indexing table includes a rotatable work supporting platform, an AC induction motor including a motor shaft coupled to the rotatable work supporting platform; and a controller ... | 12/29/2009 |
| 7638964 | Machine having movable unit to be controllably driven by servo motor A speed region of a motor is divided into a region lower than a first switch speed VS1, a region higher than a second switch speed VS2 and a region between the first and second switch speeds. An abnormal load determination level to be compared with an ... | 12/29/2009 |
| 7638965 | Motor control apparatus A velocity control loop of a motor control apparatus including a notch filter. The notch filter attenuates a signal component at a central frequency from a motor driving command, and outputs the attenuated motor driving command. The driving of a motor is controlled ... | 12/29/2009 |
| 7635961 | Position detecting apparatus having electric motor and method for detecting position A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the pl... | 12/22/2009 |
| 7541763 | Servo control device A servo control device includes a current supply unit for supplying a drive unit with a drive current for driving a target to be controlled; a first detector for detecting at least the drive current value; and a logical arithmetic section which introduces a current ... | 06/02/2009 |
| 7535192 | Head positioning control method, head positioning control device and disk apparatus A positioning control device executes disturbance observer control having a disturbance suppression function, wherein changes of control characteristics are prevented even if the disturbance frequency is suppressed. When a control value of an actuator is computed us... | 05/19/2009 |
| 7528565 | Signal processing device, signal processing method, signal processing program, recording medium storing the program, speed detector and servomechanism A signal processing device processes a position information signal (A sinθ, A cosθ) output from a sensor in accordance with a driving position of a motor and detects a driving speed of the motor. The signal processing device includes a position information signal ... | 05/05/2009 |
| 7479750 | Controller for electric motor A controller including a learning control unit for determining learning data based on a positional deviation between a target-position command commanding superimposed-type motion including repetitive motion and a positional fed-back variable obtained from an output ... | 01/20/2009 |
| 7463000 | Motor controlling method, motor controlling apparatus, and recording apparatus A method of controlling, by an adaptive control method, an electric motor as a drive source of an operating apparatus that operates, based on a driving force produced by the electric motor, under an arbitrary one of a plurality of operating conditions, and exhibits ... | 12/09/2008 |
| 7456595 | Method and apparatus for adaptive control of a disk drive in the presence of non-linear magnetic bias According to a preferred aspect of the instant invention, there is provided a system and method of moving a disc drive arm in the presence of nonlinear magnetic bias. Further, in another preferred embodiment the instant method will be adaptive and/or self-corrective... | 11/25/2008 |
| 7453226 | Synchronized rear vision system A synchronized rear vision system for a vehicle includes a pair of external side rearview mirrors for attachment to the vehicle and an interior rearview mirror for attachment to the vehicle. The synchronized rear vision system also includes a system master controlle... | 11/18/2008 |
