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Class Information
Number: 318/638
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > With particular "error-detecting" means
Description: Subject matter in which a particular error detecting means is provided. An error detector is a device which compares the command signal with the feedback signal and produces an error signal related to the difference between these signals.

Sub-classes under this class:

Class Number Class Name Patents
318/640 Photoelectric or optical-type measuring instruments 370
318/639 Plural, diverse conditions 18
318/651 With acceleration measuring instruments 38
318/650 With current, voltage or electrical power measuring instruments 87
318/644 With flow measuring instruments 17
318/645 With fluid pressure measuring instruments 28
318/646 With force or weight measuring instruments 77
318/648 With inertial, direction or inclination measuring instrument 134
318/642 With liquid level measuring instruments 11
318/647 With magnetic field measuring instruments 36
318/643 With moisture content or wetness measuring instruments 12
318/652 With particular position measuring instruments 227
318/641 With particular temperature measuring instrument 38

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8710777 Method for automatically estimating inertia in a mechanical system Apr. 29, 2014
8692504 Apparatus and methods for determining an initially unknown commutation position of a member moved by a planar motor Apr. 8, 2014
8653780 Integrated upsampler and filtering for multi-rate controller for electro-mechanical flight actuation system Feb. 18, 2014
8633667 Semiconductor integrated circuit device Jan. 21, 2014
8571691 Scaling and parameterizing a controller Oct. 29, 2013
8536823 Driving method and driving device for driving a polyphase inverter Sep. 17, 2013
8473165 Turning drive control apparatus and construction machine including the same Jun. 25, 2013
8466645 Motor control circuit Jun. 18, 2013
8410741 Servo motor control apparatus and control method Apr. 2, 2013
8406905 Scaling and parameterizing a controller Mar. 26, 2013
8295973 Control arrangement with correction means for systematic position-dependent errors Oct. 23, 2012
8264183 Windshield wiper control unit and windshield wiper control method Sep. 11, 2012
8232758 Controller of electric motor having function of estimating inertia and friction simultaneously Jul. 31, 2012
8222853 Servo motor control apparatus and control method Jul. 17, 2012
8203294 Electric energy storage integrated within or proximate to electrically driven flight control actuators Jun. 19, 2012
8198841 Method and circuit for processing a resolver fault Jun. 12, 2012
8179078 Handheld or vehicle-mounted platform stabilization system May. 15, 2012
8159174 Method for adapting controller parameters of a drive to different operating states Apr. 17, 2012
8138698 Motor rotation irregularity detection circuit Mar. 20, 2012
8129933 Motor controlling method and apparatus thereof Mar. 6, 2012
8125309 Fail-safe remote control Feb. 28, 2012
8102138 Electric power steering apparatus and method of assembling the same Jan. 24, 2012
8103153 Reliable monitoring of the speed in coordinate measuring appliances Jan. 24, 2012
8076888 Method for protecting an electronic device driven by DC motor and circuit for detecting positioning signals thereof Dec. 13, 2011
8072176 Displacement sensing method and motor control apparatus Dec. 6, 2011
8049457 Press machine controller Nov. 1, 2011
8041436 Scaling and parameterizing a controller Oct. 18, 2011
8013560 Method for compensating for angular transmission error of an actuator Sep. 6, 2011
7994749 Multiple-rotation absolute-value encoder of geared motor Aug. 9, 2011
7958620 Method of producing a rotary encoder Jun. 14, 2011
7948199 Single-ended gain stage and disk drive May. 24, 2011
7915848 Servo control apparatus that performs dual-position feedback control Mar. 29, 2011
7888902 Adjustable voice coil motor driver Feb. 15, 2011
7847506 Machine tool controller Dec. 7, 2010
7843154 Motor controller and electric power steering apparatus Nov. 30, 2010
7816881 Method and apparatus for utilizing commutation sensors for speed and position control Oct. 19, 2010
7816882 Method of protecting an electronic device driven by DC motor and circuit for detecting positioning signals thereof Oct. 19, 2010
7818073 Method for obtaining improved feedforward data, a lithographic apparatus for carrying out the method and a device manufacturing method Oct. 19, 2010
7813089 Motor controller and electric power steering apparatus Oct. 12, 2010
7800334 Drive system Sep. 21, 2010
7795898 Fan having function for detecting fault in the fan Sep. 14, 2010
7782217 System and method for monitoring motor Aug. 24, 2010
7755317 Methods for electric vehicle motor control and rotor position detection fault-tolerant processing Jul. 13, 2010
7652446 Method for detecting and controlling output characteristics of a DC motor and a self-propelled apparatus using the same Jan. 26, 2010
7642741 Handheld platform stabilization system employing distributed rotation sensors Jan. 5, 2010
7633256 Encoder eccentricity correction for motion control systems Dec. 15, 2009
7622881 Method and apparatus for estimating system inertia where number of motor rotations are restricted Nov. 24, 2009
7612576 Method for detecting an inverter hardware failure in an electric power train Nov. 3, 2009
7605560 Motor driving apparatus Oct. 20, 2009
7602135 Arrangement having at least one movable furniture part Oct. 13, 2009

1 2 3 4

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