Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 8072172 | Redundant electromechanical actuator for control surfaces A redundant electromechanical actuator is provided that includes first and second electric motors, a common output shaft, first and second drive cable drums, first and second driven cable drums, a first cable, and a second cable. The first and second electric motors... | 12/06/2011 |
| 7960934 | Fault-tolerant control system A fault-tolerant position feedback filter may be used in an actuation control system to limit the authority of a first position signal, should the first position signal become erroneous, and thereby prevent a postulated runaway condition of an acuator. The filter in... | 06/14/2011 |
| RE42200 | Fault handling of inverter driven PM motor drives An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed, and a controller. The controller is operable to appl... | 03/08/2011 |
| 7424642 | Method for synchronization of a controller A system and method for reintegration of a redundant controller after occurrence of a fault is provided, comprising synchronizing outputs of a primary controller with outputs of secondary controllers. The controller is placed in a different mode of operation in whic... | 09/09/2008 |
| 7400104 | Voltage converting device, computer readable recording medium with program recorded thereon for causing computer to execute failure processing, and failure processing method A control device detects whether or not an up-converter fails, based on a DC voltage from a voltage sensor, an output voltage from a voltage sensor, and a duty ratio in controlling switching of NPN transistors. If a failure in the up-converter is detected, the contr... | 07/15/2008 |
| 7312595 | Motor control apparatus Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop control. During the open-loop control, the motor is rotated by sequentiall... | 12/25/2007 |
| 7279862 | Fault handling of inverter driven PM motor drives An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed, and a controller. The controller is operable to appl... | 10/09/2007 |
| 7222008 | Vehicle steering control apparatus The present invention relates to a steering control apparatus for maintaining operating characteristics which do not change from when conditions are normal and when an impairment occurs. The apparatus includes a plurality of motors for driving a steered wheel and a ... | 05/22/2007 |
| 7209809 | Method and apparatus for obtaining high integrity and availability in multi-channel systems Systems and methods for asynchronous multi-channel data communications are provided. An embodiment of the invention includes a minimum of three channels for digital computation in Primary Flight Computers and four channels for digital/analog conversion in Actuation ... | 04/24/2007 |
| 7157874 | Electric power steering device An electric power steering device comprising a control unit capable of distinguishing a failure of a motor current detection device caused by a change in power voltage, an oxide film formed on the commutator of a motor or the contact point of a relay, etc. from a fa... | 01/02/2007 |
| 7157875 | Method and system for fail-safe motor operation An electric device includes a motor and a motor drive for commanding a torque generated by the motor. A fault control circuit detects a fault condition associated with the motor drive. Upon detection of the fault condition, the fault control circuit adjusts the torq... | 01/02/2007 |
| 7154244 | Steering apparatus Steering apparatus includes at least one motor for generating a steering assisting force in a direction to steer a steerable wheel, two drive circuits having respective switching elements for PWM-controlling the motor, and a controller for differentiating, between t... | 12/26/2006 |
| 7098619 | Actuator and movement linkage system An actuator and movement linkage system for moving a load, such as a control surface of aircraft, in relation to a carrying structure includes an electric motor system, an actuator device connectable or connected to the load to move the load, the actuator device con... | 08/29/2006 |
| 7071643 | Dual speed quad brush two pole motor system A motor system includes four brushes electrically connected to a rotor. A stator includes two magnetic poles. A circuit selectively rotates the rotor at a first speed by applying a first voltage to a first of the brushes and a second voltage to a second of the brush... | 07/04/2006 |
| 7028356 | Multiconfiguration braking system Certain embodiments include a system and method for braking in a patient positioning system. The system includes a patient positioning surface for supporting a patient, a first brake for affecting motion of the patient positioning surface, and a second brake for aff... | 04/18/2006 |
| 7002313 | Electric power steering device control apparatus An object of the present invention is to provide a controller for an electric power steering apparatus which has a function capable of detecting abnormality of motor current detection circuits even while a steering operation is being executed and can execute alterna... | 02/21/2006 |
| 6957458 | Coordinative lifting control method of bottom sections for lying furniture such as a bed A method of controlling the coordinative lifting of bottom sections of lying furniture such as a bed that has a back bottom section for lifting the back portion of a lying person and a knee bottom section for lifting his/her knee portion, in which the respective bot... | 10/25/2005 |
| 6935596 | Process and system for piloting an aircraft The piloting system (1) for generating orders for piloting the aircraft according to at least one piloting axis, for example the pitch axis, the roll axis, the yaw axis or the engine thrust control axis, comprises at least two piloting means (2, 3), ea... | 08/30/2005 |
| 6920718 | Independent backup power supply for a security barrier A system is disclosed for providing a backup power supply for a security gate system. In a preferred embodiment it includes a primary power supply, an AC motor and an auxiliary DC motor that share the same accessory devices including controller, movement mechanism, ... | 07/26/2005 |
| 6809487 | Control system for a robotized gearbox in a motor vehicle, with the ability to learn the position of the ratios or gears The system is operable to control a robotized gearbox which includes control levers which can be displaced along at least one working line along which a plurality of nominal operating positions are defined which correspond to the speed ratios or gears and to a neutr... | 10/26/2004 |
| 6803736 | Control system which carries out the model-supported safety monitoring of an electronically regulated controller in the motor vehicle A system for controlling a regulator equipped with an electric servomotor in a motor vehicle. With reference to an example of an electronic steering system that has an electric-motor steering regulator, output parameters are generated by a model-assisted monitor for... | 10/12/2004 |
| 6791290 | Electrohydraulic converter The present invention relates to a device in an electronic driving dynamics control system, comprising an electromechanic transducer, especially an electric motor, a hydraulic pump, and an electric actuating unit for the transducer, said transducer including a magne... | 09/14/2004 |
| 6636009 | Fault-tolerant electromechanical actuating device A fault-tolerant electromechanical actuating device for converting an electrical actuating signal into a mechanical output actuating value for use in vehicles, having two mutually independent control loops. Each loop has at least one controller and at lea... | 10/21/2003 |
| 6616121 | Control system for servo valve and control method therefor, and combined-cycle electric-power generating plant and gas turbine plant An object of the present invention is to provide a control system and a control method for servo valve which can stably continue to control a servo valve when a break occurs in servo coils of a servo valve having a plurality of servo coils. In the present... | 09/09/2003 |
| 6573672 | Fail passive servo controller The present invention provides apparatus, systems and methods for fail passive servo controllers. In accordance with an exemplary embodiment of the present invention, servo controller is used with an ALS to control an aircraft during landing procedures. I... | 06/03/2003 |
| 6566833 | Prone positioning therapeutic bed A prone positioning therapeutic bed comprises a base frame and a patient support platform rotatably mounted on the base frame for rotational movement about a longitudinal rotational axis and a drive system for rotating the patient support platform on the ... | 05/20/2003 |
| 6563281 | Device for controlling the operation of driving apparatus A device for monitoring operation of a driving arrangement including at least a servo-mechanism, which includes a regulator, a driving motor controlled by the regulator, and an element which can be set in motion by the driving motor. A detection arrangeme... | 05/13/2003 |
| 6526324 | Controller for industrial machine A controller capable of monitoring a receiving circuit for receiving machine information. Machine information from a machine is received by a plurality of independent systems and the external signals received by the plurality of systems are compared, ther... | 02/25/2003 |
| 6489741 | Robot motion compensation system Motion of a substrate-transporting robot arm is controlled in order to compensate for inaccuracies and deflections encountered during operation. The compensation is effected by synchronizing elevational and planar motions of the robot arm such that the tr... | 12/03/2002 |
| 6446911 | Method for controlling actuators on a vehicle The present invention is a method that allows controllable devices attached to a vehicle's surface (such as, for example, controllable actuators on an aircraft) to be controlled by a processor or like device in an active-active mode and when a malfunction... | 09/10/2002 |
| 6445148 | Structure of plural motor assembly and method for controlling the same A plural motor assembly includes a first motor generating a parameter, a control circuit electrically connected to the first motor for detecting the parameter and outputting a switch signal while the parameter is abnormal, and a second motor electrically ... | 09/03/2002 |
| 6437529 | Multi-stator motor with independent stator circuits First and second stator circuitry for respective use with first and second stators in a multi-stator motor are configured so that the first stator circuitry is substantially unaffected by a failure of the second stator circuitry to energize a second windi... | 08/20/2002 |
| 6400114 | Numerical control apparatus for roll grinding machine A numerical control apparatus for the numerical control of a roll grinding machine comprises a flaw detecting means for scanning the entire surface of a roll (11), provided with an ultrasonic detecting head (23) for detecting flaws formed in the surface o... | 06/04/2002 |
| 6377012 | Servo system controller A servo system controller which has a sequence controlling section 2 and a servo controlling section 3, employs not only a current position of a servo motor but also other servo control data or a sequencer device as comparison data, and executes a compari... | 04/23/2002 |
| 6373217 | Control apparatus of electric power steering system There have been cases wherein the program itself does not operate normally and only continues to output the monitoring pulse so that racing cannot be detected, or due to electromagnetic waves or noise a pulse signal being outputted normally is measured er... | 04/16/2002 |
| 6368064 | Apparatus and method of providing redundant power and redundant fan speed control to a plurality of fans An apparatus and method for providing redundant power and redundant fan speed control to a plurality of fans is provided. A first power supply input is electrically connected to a second power supply input to provide a combined power supply input. First a... | 04/09/2002 |
| 6341245 | Machine tool displacement correcting apparatus A history of function values of a spindle rotation frequency in each time period from present to past is stored in a data table 22D and corrective coefficients are stored in advance in a corrective coefficient table 22C relating the coefficients to the lo... | 01/22/2002 |
| 6257529 | Servo actuator apparatus and aircraft control apparatus A servo actuator apparatus has: an actuator which relatively displaces an operation unit on the basis of an input signal E1; a position sensor which detects a relative position of the operation unit and outputs a detection signal D1; an actuator which rel... | 07/10/2001 |
| 6150786 | Controller for industrial machine A controller for an industrial machine capable of monitoring a receiving circuit for receiving position information. A receiving circuit and an additional receiving circuit receive the same position information from a detector, and a monitoring circuit mo... | 11/21/2000 |
| 6133706 | Printer subsystem motion-control sensor apparatus In accordance with the described invention, a stepper motor that drives a printer's movable subsystem, e.g. a sled-mounted ink-jet service station, is replaced with a less expensive and quieter DC motor, and continuous positional feedback is obtained via ... | 10/17/2000 |
