Celebrity Inventors
Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8154238 | Accurate and versatile back EMF sensor A filter representing a complex impedance of a motor system based on a deviation between a first voltage driven by a command signal and a second voltage driven by the command signal can be dynamically adjusted. The motor system can be held in a steady state, elimina... | 04/10/2012 |
| 8084982 | HVAC actuator with output torque compensation An HVAC actuator, such as a spring return actuator, may adjust the maximum output torque of the motor with the varying spring return force of the HVAC actuator as the HVAC actuator moves through its range of motion. In some cases, this may provide a more constant fo... | 12/27/2011 |
| 8022649 | Control of switched reluctance machines A flux switching electric motor (102) is disclosed. The motor comprises a rotor (104), a stator (106), field windings (124, 126) and armature windings (128, 130). #A microcontroller (134) controls supply of electrical curren... | 09/20/2011 |
| 7990088 | Motor control apparatus At an initial drive operation after turning on of an electric power source, an ECU sequentially changes each current exciting phase among multiple phases through one complete cycle at a predetermined time schedule, so that a rotational position of a rotor and the co... | 08/02/2011 |
| 7977906 | Saccadic tracking for an electro-mechanical system Described is a fault-tolerant electro-mechanical system that is able to saccade to a target by training and using a signal processing technique. The invention enables tracking systems, such as next generational cameras, to be developed for autonomous platforms and s... | 07/12/2011 |
| 7893643 | Pair pole asymmetry compensation in back electromotive force zero cross detection Disk drive spindle jitter is comprised of electrical noise, error due to pair pole asymmetry, and random disk speed variances. Error caused by pair pole asymmetry can be identified and compensated for by detecting over a single rotation of a rotor a plurality of zer... | 02/22/2011 |
| 7808198 | Robust timed switching control with state measurement A mechanism for empirically deriving the values of the damping ratio and frequency of the mechanism driven by a servo-controlled control system is disclosed. In accordance with the illustrative embodiment, the values of the damping ratio and frequency are continuall... | 10/05/2010 |
| 7750592 | Axis-of-rotation position control device When performing numerical control of a rotary table, the moment of inertia and the center of gravity of a control target change because of a placed object fixed onto the rotary table. A rotary table to which a placed object has been fixed serves as a target plant, t... | 07/06/2010 |
| 7701161 | Motor balanced active user interface assembly An active user interface assembly includes a user interface, and one or more feedback motors coupled to the user interface. The one or more feedback motors, when energized, supply a feedback force to the user interface that opposes user interface movement. One of th... | 04/20/2010 |
| 7433762 | Methods for controlling multiple actuators Methods for controlling at least two actuators are provided. An internal control system sends an input received from the main control system to a first actuator and diverts a portion of the input to a second actuator when an input constraint of the first actuator is... | 10/07/2008 |
| 7425810 | Disk drive management Arrangements and methods for implementing a “spin-down policy” for HDD motors that is “smart”, flexible and admirably achieves an objective of ensuring prolonged motor life as just discussed. To this end, one specific implementation involves (among other thi... | 09/16/2008 |
| 7420348 | Drive apparatus Optical disc drives designed for reduced power consumption switch the supply voltage in three stages between first, second, and third power supplies. The reduction in power consumption that is possible in the focusing and tracking drive circuits with three stage swi... | 09/02/2008 |
| 7417399 | Integrated motor device and method of setting and reading driver configuration parameters using driver configuration data embedded in driver control signals An integrated motor device with driver circuitry and method of setting and reading configuration parameters of the driver circuitry uses configuration data embedded in driver control signals to set at least one configuration parameter of the driver circuitry. ... | 08/26/2008 |
| 7414379 | Servo control system A servo control system having a proportional (P) or a proportional plus integral (PI) position controller, which output signal represents an input speed reference signal for a speed close loop system with a speed controller detecting a speed deviation, derived from ... | 08/19/2008 |
| 7408313 | Low power preamplifier writer architecture A circuit is adapted to activate a writer head of a data storage media drive during both the boost periods as well as the steady state periods. The current supplied to the writer head during the boost periods exceeds the steady state current and flows between positi... | 08/05/2008 |
| 7397212 | DC motor phase estimation with phase-locked loop A DC motor phase estimation algorithm that estimates a speed-related harmonic frequency of a DC motor current under dynamic load conditions having known geometry parameters. The algorithm estimates the phase and magnitude of a complex coefficient in a complex single... | 07/08/2008 |
| 7392113 | Systems for controlling multiple actuators Methods, control systems, and information handling systems for controlling at least two actuators are provided. An internal control system sends an input received from the main control system to a first actuator and diverts a portion of the input to a second actuato... | 06/24/2008 |
| 7372660 | Disc storage system with adaptive PID control A disc drive controller circuit for an actuator receives reference data indicating a desired actuator position “θd”, error data indicating a difference “e” between the desired actuator position and a sensed actuator position “θ”, and adaptiv... | 05/13/2008 |
| 7369350 | Power protection for VCM control loop in hard disk drive servo IC A VCM power protection circuit that limits the maximum voltage that can occur across any of the VCM's output FETs, while at the same time providing some bias on a VCM output to direct a head toward a landing zone during power-up or any time there is a higher than no... | 05/06/2008 |
| 7366576 | Position control device and position control method for machine tools A machine tool moves a driven member by use of a servomotor. A position control device controls the position of the driven member in accordance with full closed loop control. The position control device computes an integrated feedback value g in correspondence with ... | 04/29/2008 |
| 7362538 | Torque constant correction method in multiple sinusoidal seek servo and disk drive using the same A disk drive control method and apparatus. In particular, a torque constant correction method and apparatus in a disk drive using a multiple sinusoidal seek servo scheme. The torque constant correction method includes: performing a test seek routine for torque const... | 04/22/2008 |
| 7348745 | Controller First and second acceleration detectors are attached to first and second sections on a driven body, and values of accelerations α1 and α2 in a travel direction of the driven body are detected. On the basis of the difference or sum of the acceleration... | 03/25/2008 |
| 7345443 | Motor control apparatus It is an object of the invention to provide a motor control apparatus capable of ensuring a control function even for a large inertia moment ratio. In a motor control apparatus including a position detecting portion (1B) of a motor (18) for driv... | 03/18/2008 |
| 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 plurality of phase windings and a rotor that rotates relative to the stator... | 03/11/2008 |
| 7336571 | Method and arrangement for compensating scanning disturbances on optical recording media The invention relates to a method and an arrangement for compensating scanning disturbances on optical recording media such as occur in a control loop of a playback or recording unit, in particular as settling amplitude after a disk disturbance and are caused by scr... | 02/26/2008 |
| 7337021 | Robust spacecraft controller and method for designing same A method, apparatus, article of manufacture, and a memory structure for designing a robust controller. The method comprises the steps of determining a plant model G of the system dynamics; bounding system dynamics unmodeled by the plant model G of the system dynamic... | 02/26/2008 |
| 7337091 | Method and apparatus for coordinating fault detection settings and process control changes A system includes a process tool for processing a workpiece, a process controller, and a fault monitor. The process controller is configured to determine a control action for updating an operating recipe of the process tool. The fault monitor is configured to determ... | 02/26/2008 |
| 7333292 | Seek servo control method for adapting to supply voltage variation and disk drive using the same A seek servo control method and device for a disk drive device for performing seek servo control according to a variation in a power supply voltage for the disk drive. The seek servo control method includes: detecting a supply voltage for the disk drive; and adjusti... | 02/19/2008 |
| 7330009 | Method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing motor oscillation A method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing oscillation of the motor rotational speed are disclosed. A motor drive controller includes a drive motor, a detector, and a motor drive controller. The drive mo... | 02/12/2008 |
| 7328086 | Robotic tool coupler rapid-connect bus A tool changer comprising a master module and a tool module includes a rapid-connect communication bus between the master and tool modules. A unique tool identification number, along with other tool-related information, may be transmitted from the tool module to the... | 02/05/2008 |
| 7327103 | Driver and method for control of voice coil motor in disk drive A driver for a voice coil motor in a disk drive includes a sensor that provides a sense current by sensing a coil current in the voice coil motor, a comparator that provides an error current by determining a difference between a command current and the sense current... | 02/05/2008 |
| 7321210 | Sensorless brushless direct current motor drive using pulse width modulation speed control at motor frequency Disclosed is a variable speed brushless direct current (BLDC) motor drive circuit. The circuit includes a plurality of high-side and low-side controlled switches coupled in a three-phase bridge configuration for commutating a BLDC motor, each phase of the bridge bei... | 01/22/2008 |
| 7319910 | Method and device for controlling a movement of a movable machine element of a machine tool or production machine A method and device for controlling a movement of a movable machine element of a machine tool or production machine with at least two drive axles are disclosed. At least one mechanical characteristic frequency is determined for each drive axle of the machine, and th... | 01/15/2008 |
| 7319466 | Method and apparatus for generating and interfacing with a haptic virtual reality environment A method for generating a haptic interactive representation including the steps of defining a haptic interaction space and building a hierarchical construct, for use within the haptic interaction space, using a plurality of underlying constructs. In one embodiment t... | 01/15/2008 |
| 7316382 | Controlling electromotive actuators The invention relates to an electromotive actuator and a corresponding circuit in order to replace a pneumatical actuator system in a simple manner by an electric system. ... | 01/08/2008 |
| 7313468 | Force-controlled throttle for adjusting the engine thrust of a combat aircraft A force-controlled throttle for adjusting the engine thrust of a combat aircraft with a handle for operation by a pilot and with a signal generating device that is connected to the handle for generating a control signal used for adjusting the engine thrust. The sign... | 12/25/2007 |
| 7295907 | Recovery of calibrated center steering position after loss of battery power The steering angle of a vehicle is monitored using position sensors of an electric motor of an electric power assisted steering (EPAS) system. A position of the electric motor corresponding to the straight-ahead, center position of the steering system is stored in n... | 11/13/2007 |
| RE39906 | Gyro-stabilized platforms for force-feedback applications Force feedback in large, immersive environments is provided by device which a gyro- stabilization to generate a fixed point of leverage for the requisite forces and/or torques. In one embodiment, one or more orthogonally oriented rotating gyroscopes are used to prov... | 11/06/2007 |
| 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 |
| 7292000 | Angular velocity measuring device and leg-moving robot An angular velocity measuring device (1) includes a first sensor (2) (vibration gyro) and a second sensor (3) (gas rate gyro). The detection output of the first sensor (2) is inputted to a high pass filter (4). Output of the filter... | 11/06/2007 |
