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| Number | Title | Issue Date |
| 8179076 | Chip structure capable of smoothing slope of signal during conversion The present invention discloses a chip structure capable of smoothing slope of signal during conversion. And the chip structure is suitable for a DC motor which is embedded in a portable electronic device. The DC motor is for adjusting the focal distance of a digita... | 05/15/2012 |
| 8120303 | Method and apparatus for controlling inertial system Suppression of vibration of a load machine without reducing the responsiveness of the load machine to an operation command is achieved by a method and an apparatus for controlling an inertial system intended to control an inertial system that has a motive power gene... | 02/21/2012 |
| 8044630 | Device of radioelectric signals transmitter and/or receiver type Radiofrequency device (30; 30′; 30″; 30′″) controlling means for supplying at least one electrical load (14, 14′) and comprising a radiofrequency unit (11) of radiofrequency signals transmitter and/or receiver type and connected by a f... | 10/25/2011 |
| 8044629 | Self-tuning vibration absorber A self-tuning vibration absorber including a carrier rod assembly having operatively connected thereto a mounting mechanism for mounting the carrier rod assembly to a primary system and a hollow shafted motorized tuning mechanism for tuning a phase difference betwee... | 10/25/2011 |
| 8018193 | Torque ripple mitigation controller with vibration sensor delay compensation An enhanced torque ripple mitigation algorithm for permanent magnet synchronous machines (PMSMs), the algorithm including compensation for sensor delay. ... | 09/13/2011 |
| 7969113 | Motor control system A motor control system suppresses vibration of a machine base and achieves high-speed positioning without using a special sensor but using a model control system. A first feedback section outputs a first feedback command generated based on model machine base positio... | 06/28/2011 |
| 7948197 | Controlling torsional shaft oscillation Torsional oscillation of a shaft in a swing drive system of an excavator is minimized by monitoring torsional strain of the shaft. An electric motor provides torque to the shaft in response to a drive signal provided by a converter. A compensation circuit produces a... | 05/24/2011 |
| 7936143 | Device for preventing sway of suspended load This invention provides a device for preventing sway of a suspended load, which does not require complex calculation for eliminating frictional resistance components. The device is equipped with a speed control device (14) for outputting a torque command base... | 05/03/2011 |
| 7923955 | Method and apparatus for controlling an active engine mount A control circuit for an active engine mount is provided, including an electrical bridge circuit, and a pulse-width modulation (‘PWM’) circuit. The PWM circuit receives an input signal from a controller, and generates first and second PWM output signals. The fir... | 04/12/2011 |
| 7768225 | Servo control system for movable body, and laser drilling machine A difference between each position command data outputted in a form of a step signal from a high-level controller and its corresponding detected position data of a movable body is integrated by an integral compensator to position the movable body. Assuming, for exam... | 08/03/2010 |
| 7750593 | Active human-machine interface system without a force sensor An active human-machine interface system is implemented without a force sensor. The system includes a user interface that is configured to receive user input and, upon receipt thereof, to move to a position. A position sensor is coupled to the user interface and is ... | 07/06/2010 |
| 7692397 | Motor control device and corresponding control method The aim of the invention is to provide a speed control method for reducing current ripple and speed ripple at constant dynamics behavior while reducing the hardware required to a minimum. For this purpose, a control signal, especially a speed deviation (ev) is divid... | 04/06/2010 |
| 7683567 | Method for improving scanning probe microscope imaging by inverse filtering In accordance with the invention, an inverse filter is used to improve scanned images from a scanning probe microscope by removing the effect of the scanning system dynamics from the image data. This may be done in-line or as a post-processing operation. ... | 03/23/2010 |
| 7679306 | Feedback control system A closed loop control system for controlling an actuator operating on a moveable member, includes a control device controlling operation of the actuator, a sensor responsive to a condition such as loading of the moveable member as it is moved by the actuator and ada... | 03/16/2010 |
| 7633257 | Active vibration control system for hybrid vehicle In a motor-assisted hybrid vehicle, an active vibration control system suppresses torque fluctuations of an engine without detriment to the response of a static torque. An adaptive notch filter outputs a control signal depending on a harmonic basic signal generated ... | 12/15/2009 |
| 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 the servo system to shorten processing delay, which improves the stab... | 07/14/2009 |
| 7501783 | Method of automatically setting vibration suppression filter and automatic setting apparatus for vibration suppression filter In a method of automatically setting the vibration suppression filter, when a vibration detection portion detects a vibration A2, a state variable frequency analysis portion analyzes the frequencies of data from a state variable trace portion to calculate a v... | 03/10/2009 |
| 7439693 | Anomaly detection method and motor control device A control unit of a motor driver performs feedback control to supply current to a linear motor based on a detection value of a linear encoder. An anomaly detection unit monitors the supply current to the linear motor, and the anomaly detection unit detects anomaly o... | 10/21/2008 |
| 7424337 | Method for increasing the control dynamics of a load driven by a driveshaft of direct drive In a method for increasing the control dynamics of a load driven by a direct drive via a driveshaft, a first transducer provides a first output signal indicating a first rotation speed, and a second transducer provides a second output signal indicating a second rota... | 09/09/2008 |
| 7397216 | Circuit for monitoring harmonic distortion in the power supply of a synchronous electrical machine with permanent magnet excitation The present invention provides a circuit for monitoring harmonic distortion in the power supply of a synchronous electrical machine with permanent magnet excitation that comprises a rotor without a damper cage, a stator with first, second, and third windings, a freq... | 07/08/2008 |
| 7382295 | Control unit for electric power steering apparatus Since an abnormality is judged by executing a square calculating process with respect to sin θ and cos θ for detecting an abnormality in an angular resolver, a processing time is elongated, and a burden to a CPU is great. Since the invention prepares a map which c... | 06/03/2008 |
| 7370524 | Adaptive vibration control using synchronous demodulation with machine tool controller motor commutation A control system and method for actively reducing vibration in a spindle housing caused by unbalance forces on a rotating spindle, by measuring the force-induced spindle-housing motion, determining control signals based on synchronous demodulation, and provide compe... | 05/13/2008 |
| 7365511 | Methods to control high speed electric machines having a front-end EMI filter attached A system and method for extracting estimated input voltage and input current values of an AC motor based on sensed power inverter output voltage and output current when the AC motor is connected to a front-end EMI filter and the EMI filter is connected to a power in... | 04/29/2008 |
| 7365513 | Positioning device having dynamically isolated frame, and lithographic device provided with such a positioning device A guided stage mechanism suitable for supporting a reticle in a photolithography machine includes a stage movable in the X-Y directions on a base. Laterally surrounding the stage is a rectangular window frame guide which is driven in the X-axis direction on two fixe... | 04/29/2008 |
| 7357195 | Power tool and gear unit assembled therein A power tool including a gear unit provided with a load moderating mechanism capable of reducing noise and prolonging service life. A coupling is force fitted with a spindle at a predetermined pressure allowing the spindle and the coupling to rotate relative to each... | 04/15/2008 |
| 7357204 | Drive-control system of electromotive vehicle and drive-control-method of electromotive vehicle A drive-control-system of electromotive vehicle and drive-control-method of an electromotive vehicle. A system has a condition-determination-process unit that reads a vibration index as a factor causing vibration in the vehicle-drive-system, and determines whether a... | 04/15/2008 |
| 7355364 | Motor and controller inversion: commanding torque to position-controlled robots Systems and methods are presented that cancel the dynamics of a motor and a joint controller in the presence of communication time delays, measurement noise, and controller parameter uncertainties inherent in a robot system. A cancellation system includes feedback o... | 04/08/2008 |
| 7345446 | Method of controlling movable member driven by electric motor Method of controlling a movable member driven by an electric motor by monitoring current circulating through the electric current and ripples therein. The method including detecting current peaks and count the number of current peaks falling within sampling windows ... | 03/18/2008 |
| 7331265 | Electromagnetic punch presses with feedback device An electromagnetically driven punch press is described. The punch press has an engine plate and a die set and a ram between the engine plate and die set. The engine plate has an assembly fixed thereto having a solenoid with windings that create a magnetic field when... | 02/19/2008 |
| 7324872 | Robot apparatus An external force estimation system for estimating an external force acting upon a robot apparatus which includes a machine body which in turn includes a plurality of movable joints is disclosed which includes a distribution type contacting state detection section, ... | 01/29/2008 |
| 7292001 | Gain adjusting method for servo control device An object of this invention is to provide a gain adjusting method in a servo control device to suppress changes according to a place where a machine is located. This invention provides a gain adjusting method for a servo control device providing speed control... | 11/06/2007 |
| 7289919 | Cyclic time averaging for machine monitoring A cyclic time averaging method is directed at processing time-domain vibration data of the machine to produce an averaged time waveform over a selected cyclic time period. It is not necessary to employ a triggering signal to obtain the averaged time waveform. ... | 10/30/2007 |
| 7282819 | Stage apparatus, exposure apparatus, and device manufacturing method A stage apparatus in which support units supporting a counter-mass surface plate on a reference surface each include a first permanent magnet disposed on one of the surface plate and the reference surface, and a pair of second permanent magnets disposed on the other... | 10/16/2007 |
| 7272531 | Aggregation of asset use indices within a process plant A method of monitoring an entity within a process plant wherein the entity includes a plurality of lower level entities, includes acquiring a plurality of use indices, acquiring a plurality of weighting values, and creating an aggregate use index from a combination ... | 09/18/2007 |
| 7265514 | Frequency-variable pulse-width-modulation motor drive circuit capable of operating under different PWM frequencies A frequency-variable PWM motor drive circuit includes a drive IC member, a Hall IC member, a PWM converter circuit and a compensation unit. The drive IC member electrically connects with the Hall IC member, the drive IC member further includes a pin electrically con... | 09/04/2007 |
| 7251848 | Method for controlling dehydrating operation of drum type washing machine A method for controlling the dehydrating operation of a drum type washing machine includes a pre-acceleration step for accelerating a drum to a predetermined control starting speed, and a main accelerating step for accelerating the drum from the control starting spe... | 08/07/2007 |
| 7248014 | Motor control system A motor control system capable of securing stability and rapidity of motion even in a machine where the stability varies in accordance with a position of a driven member. The driven member and a motor for driving the driven member are operatively connected through a... | 07/24/2007 |
| 7246397 | Method for controlling dehydrating operation of drum type washing machine A method for controlling the dehydrating operation of a drum type washing machine includes a pre-acceleration step for accelerating a drum to a predetermined control starting speed, and a main accelerating step for accelerating the drum from the control starting spe... | 07/24/2007 |
| 7245058 | Vibration wave driving apparatus, and method of setting shape of support member supporting elastic member forming vibration member of vibration wave driving apparatus A vibration wave driving apparatus includes a vibration member in which an electro-mechanical energy conversion element is fixed to an elastic member, and a contact member pressed against a sliding part provided in the vibration member, so as to be kept in contact t... | 07/17/2007 |
| 7243764 | Magnetically actuated friction damper A friction damper with a housing including a cavity. The damper includes a first member disposed in the cavity and movable in the cavity; a second member disposed in the cavity; an intermediate member between the first and second members, the first member being in f... | 07/17/2007 |
