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Class Information
Number: 700/43
Name: Data processing: generic control systems or specific applications > Generic control system, apparatus or process > Optimization or adaptive control > Plural modes > Proportional-derivative (p-d)
Description: Subject matter where the system shifts from proportional control to a combination of proportional and derivative control.


Patents under this class:
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Patent Number Title Of Patent Date Issued
7502675 Feedforward control of motor vehicle roll angle Mar. 10, 2009
7496336 Weighting circuit for adjusting a control loop Feb. 24, 2009
7444193 On-line dynamic advisor from MPC models Oct. 28, 2008
7432681 Scanner system Oct. 7, 2008
7346403 Pid parameter adjustment device Mar. 18, 2008
7184847 Method and system for controlling a process in a plant Feb. 27, 2007
7177710 System and method for adaptive control of uncertain nonlinear processes Feb. 13, 2007
7035695 Method and apparatus for tuning a PID controller Apr. 25, 2006
6970750 Model-free adaptation of a process controller Nov. 29, 2005
6687553 Dual gain variable control system Feb. 3, 2004
6684112 Robust model-free adaptive control Jan. 27, 2004
6658304 Computer based method and a system for controlling an industrial process Dec. 2, 2003
6644332 Method and apparatus for multiple-input-multiple-output control of a valve/actuator plant Nov. 11, 2003
6619061 Self-tuning pull-down fuzzy logic temperature control for refrigeration systems Sep. 16, 2003
6611123 Servo control apparatus and gain adjusting method Aug. 26, 2003
6571142 Data processing apparatus, data processing method, and medium May. 27, 2003
6560585 Procedure for controlling a complex dynamic process May. 6, 2003
6181976 Adept data processor implementing function similation with inverse deviation variation weighting Jan. 30, 2001
6153998 Method of controlling a two-degree-of-freedom control system Nov. 28, 2000
5822740 Adaptive fuzzy controller that modifies membership functions Oct. 13, 1998
5812428 Process controller having non-integrating control function and adaptive bias Sep. 22, 1998
5745362 Digital PID control apparatus Apr. 28, 1998
5745361 Position control apparatus for machine tool with fuzzy compensator Apr. 28, 1998
5742503 Use of saturation relay feedback in PID controller tuning Apr. 21, 1998
5682309 Feedback method for controlling non-linear processes Oct. 28, 1997
5616998 Proportional derivitive control system with low speed offset compensation Apr. 1, 1997
5586444 Control for commercial refrigeration system Dec. 24, 1996
5528119 Method and apparatus for phase compensation in a vehicle control system Jun. 18, 1996
5410890 Control apparatus of air-conditioner May. 2, 1995
5335165 Method and apparatus for adaptive deadtime process control Aug. 2, 1994
5325288 Automatic PID controller in which the ratio of the control target value to the control signal is used to optimize performance Jun. 28, 1994
5263333 Multi-type air conditioner system with optimum control for gaseous flow adjustment valve and liquid expansion valve Nov. 23, 1993
5248921 Servo motor control device Sep. 28, 1993
5245698 Apparatus for and method of correcting membership functions Sep. 14, 1993
5189620 Control system for gas turbine helicopter engines and the like Feb. 23, 1993
5157597 Method of detecting oscillation of a servo system and automatically adjusting speed loop gain thereof Oct. 20, 1992
5124626 Sinusoidal signal amplitude and phase control for an adaptive feedback control system Jun. 23, 1992
5119288 Controlling apparatus utilized in process instrumentation system Jun. 2, 1992
5059880 Digital control system Oct. 22, 1991
4967126 Method of controlling a seven degree of freedom manipulator arm Oct. 30, 1990
RE33267 Pattern-recognizing self-tuning controller Jul. 17, 1990
4867375 Temperature-adjustable water supply system Sep. 19, 1989
4719561 Robust control apparatus responsive against disturbance Jan. 12, 1988
4706012 Frequency compensated regulator Nov. 10, 1987
4700312 Method and apparatus for controlling snake motion in rolling mills Oct. 13, 1987
4602326 Pattern-recognizing self-tuning controller Jul. 22, 1986
4523435 Method and apparatus for controlling a refrigerant expansion valve in a refrigeration system Jun. 18, 1985
4501125 Temperature conditioning system staging control and method Feb. 26, 1985
4430698 Three-mode process control Feb. 7, 1984
4374423 Arrangement for monitoring a rudder control system Feb. 15, 1983

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