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7599752 |
Tuning methods for fractional-order controllers
A method for tuning a fractional-order proportional-integral (PI) controller
C ( s ) = K p ( 1 + K i 1 s α )
includes deriving values for K p , K i , and α that satisfy a flat...
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7546170 |
Easily tuned and robust control algorithm for single or multiple variable systems
A controller and associated methods. A controller has an input for a controlled variable; a proportional term; an integral term; and a predictive term. The predictive term has an error-predictive...
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7502675 |
Feedforward control of motor vehicle roll angle
A technique for reducing excessive motor vehicle roll angle using a feedforward control comprises a number of steps. Initially, a steering angle and a speed of the-motor vehicle are determined....
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7496336 |
Weighting circuit for adjusting a control loop
For a weighting circuit for adjusting a feedback control loop to an input signal of the feedback control loop the feedback control loop comprises a system under control and a device for generating...
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7467639 |
Systems and methods for controlling gas flow
A method for controlling a motion of a gas valve in a gas feed line coupling a supply device to a burner is provided. The method includes receiving a signal representative of a user-selected...
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7457673 |
Process for rapidly controlling a process variable without overshoot using a time domain polynomial feedback controller
A method for controlling a process variable as it approaches a predetermined value (setpoint) so that the setpoint is not exceeded. The method employs a time domain polynomial equation in a...
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7454254 |
Aircraft cabin pressure control system and method for reducing outflow valve actuator induced cabin pressure oscillations
A cabin pressure control system and method that reduces or inhibits gear train backlash and the concomitant cabin pressure oscillations associated therewith. The cabin pressure control system...
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7432681 |
Scanner system
A scanner system includes a servo control unit. A rotation angle of a rotating shaft supporting a mirror is detected, and an error of the detected value with respect to a commanded value is...
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7395124 |
Adaptive motor drive method and apparatus including inertia estimator
A method and apparatus for use with a plant drive system that receives a reference command signal and generates a torque command to drive a plant, the method for estimating plant inertia and...
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7395125 |
Method and controller for the adaptive control of at least one component of a technical plant
The invention relates to a method in which at least one component of a technical plant is controlled by means of a PI controller. The actual value of the regulating parameter is continuously...
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7331760 |
Fan revolution speed control method
Actual temperatures of intake air, hydraulic oil, and coolant, to be cooled by a cooling fan, are detected. Target fan revolution speeds are determined by PI control units based on differences...
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7328075 |
Method of automatic adjustment of the control parameters of a magnetic suspension system
In adjustment of the control parameters of a magnetic suspension system, an object of the present invention is to provide a technique for adjusting the control parameters to optimum values...
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7164953 |
Speed control device
In a speed control system, there are provided a speed observer compensator ( 10 ) for inputting a difference between a speed V M of a mechanical system ( 5 ) and an estimated value V MO of a...
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7109608 |
Advanced smooth transition switch
A bi-directional smooth transition switch with bumpless transfer is disclosed. It is composed of two feedback loops, each with feedback and forward-loop compensators. During loop operation, one...
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7085611 |
Control method of PI controller
A control method of a PI controller which selectively performs a proportional control and a proportional/integral control, the method includes Fourier transforming an output of the PI controller,...
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7054846 |
Temporally discrete dynamic fuzzy logic control elements
A control unit has at least one control element, in particular with at least one integrating and/or differentiating transfer characteristic which is constructed as a temporally discrete dynamic...
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7044046 |
Hydraulic servo-assisted steering system for vehicles and a controlling method for a steering system of this type
For a hydraulic servo-assisted steering system for motor vehicles, classifying storage of the respectively measured, actual valve characteristic curves is provided and, corresponding to this,...
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7035695 |
Method and apparatus for tuning a PID controller
In tuning a controller for a process in a feedback control system, a method is provided for bringing the system into asymmetric self-excited oscillations for measuring the frequency of the...
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6970750 |
Model-free adaptation of a process controller
An adaptive process controller drives a process variable to be substantially equivalent to a set point and adapts the controller gain, the controller reset, and/or the controller rate, based on...
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6968258 |
Residual feedback to improve estimator prediction
A system and method 100 of using residual feedback in a control loop in a manner that substantially eliminates the steady state error in the predicted states that results from the mismatch in...
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6937908 |
Method for tuning PID controllers applicable to nonlinear systems
A method for tuning a PID controller includes the steps of inducing equivalent relationships between PID gains of the PID controller and parameters of time delay control (TDC), selecting a natural...
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6912426 |
Method for determining time constants of a reference model in a cascade controlling circuit
A method for determining at least one time constant of a reference model, which is designed as a 2nd order time-delay element of a machine. The method includes detecting an oscillation frequency of...
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6847851 |
Apparatus for improved general-purpose PID and non-PID controllers
An apparatus is provided for controlling a system to achieve a specified response. In one embodiment, the apparatus is a proportional, integrative, and derivative (PID) controller having a...
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6825631 |
Prediction controlling device
A controlling device of high follow-up accuracy is provided, the prediction accuracy of which is not degraded by an FF signal when the controlled object is feedforward-controlled. The prediction...
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6751510 |
Predictive and self-tuning PI control apparatus for expanded process control applications
A predictive and self-tuning PI controller includes an apparatus for variably assigning gains thereto in accordance with specified time functions following a change in set-point. The control gains...
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6735483 |
Method and apparatus for controlling a non-linear mill
A method and apparatus for controlling a non-linear mill. A linear controller is provided having a linear gain k that is operable to receive inputs representing measured variables of the plant and...
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6725100 |
Automatic load adjustment
The subject of the invention is a process for adjusting a processing unit, whereby at least one set value is varied from a starting value to a final value. In this case, the target value of a...
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6716359 |
Enhanced time-based proportional control
The instant invention is a device and method for its use which includes the addition of a deviation compensation function effective to automatically adjust the offset used in time-based...
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6718277 |
Atmospheric control within a building
A method and system for controlling atmospheric conditions within a building. A conditioned fluid is supplied inside of the building and one or more atmospheric parameters in various locations...
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6687553 |
Dual gain variable control system
A method for controlling a solenoid using a single coil solenoid for both course and fine adjustment. A resistor or series of resistors may be used in parallel/for current controlled solenoids or...
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6684112 |
Robust model-free adaptive control
A Robust Model-Free Adaptive controller is disclosed for effectively controlling simple to complex systems including industrial processes, equipment, facilities, devices, engines, robots, vehicles,...
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6675073 |
System and method for tuning the weight control of a flow of material
The present invention includes a system and method for fine tuning the process of controlling the weight of a flow of material, such as a rod of material in a production facility. A control...
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6658304 |
Computer based method and a system for controlling an industrial process
A computer based method of controlling an industrial process, including the steps of measuring the values of at least one process variable (y 1 , y 2 ), and predicting future deviations of one...
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6611123 |
Servo control apparatus and gain adjusting method
A disk apparatus includes a DSP (digital signal processor), and a DSP core of the DSP receives a feedback input from a pick-up, and generates a focus control pulse and a tracking control pulse....
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6571135 |
Control unit for controlling a system with several coupled variables
For controlling multivariable systems, a control unit for controlling a system with several coupled control variables. The control unit includes controllers ( 10, 11 ) having associated control...
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6560585 |
Procedure for controlling a complex dynamic process
A procedure for controlling a complex dynamic process. According to the procedure, information is periodically acquired and values of recorded quantities are generated. The condition and the...
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6501998 |
Method for controlling a time-lagged process with compensation, and a controlling device for carrying out said method
A method is described for the closed-loop control of a time-delayed process having compensation, in particular for temperature control. After a setpoint value step-change, the manipulated variable...
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6499022 |
Method and apparatus for optimization of servo parameter values in a data storage device
A genetic process is used to tune servo parameter values in a disk drive. An initial population of individuals is generated each including a value for each of a plurality of servo parameters....
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6496749 |
Semiconductor producing apparatus and temperature control method therefor
A semiconductor producing apparatus is capable of quickly and accurately changing a controlled variable to a target value to thereby make the controlled variable quickly follow the target value....
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6473723 |
Mimic high pass filter in a protective relay
A mimic filter which can be implemented in analog or digital circuitry, and which removes dc offset or other noise from an input signal using a pseudo-differentiation technique. The input signal is...
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6445980 |
System and method for a variable gain proportional-integral (PI) controller
A method for generating a valve drive signal using a variable gain PI controller in a mass flow controller. The method includes multiplying an error signal with a proportional gain factor to...
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6442534 |
Hydraulic controller using multiple regime specific controllers combined with fuzzy logic
A control system for an actuator employs a number of discrete feedback controllers each tuned to different operating conditions or parameters. The competing outputs of the feedback controllers are...
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6427718 |
Automated farm turnout
An automated turnout system is provided for controlling water flow through a turnout gate. The system determines the water flow parameters of the open channel and adjusts the size of the gate...
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6408228 |
Hybrid finite state machine environmental system controller
The present invention provides a sequencing control strategy for environmental system controllers that takes better advantage of the capabilities of the system elements to enhance performance and...
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6278902 |
Robot control method and robot control system
A DSP of a servo control circuit obtains a movement value of a servomotor for each axis for each position-speed feedback processing cycle in accordance with a move command value for each axis...
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6278255 |
Apparatus and method for eliminating variable offset values of current detecting signals
An apparatus for eliminating variable offset values of current detecting signals and its method having a current detector for detecting feedback current from a three-phase AC motor and for...
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5973467 |
Velocity control device using servo motor
A velocity control device controls a velocity of an object via a servo motor so that a damping phenomenon during acceleration or deceleration and a swelling phenomenon of a specified frequency...
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5971579 |
Unit and method for determining gains a of PID controller using a genetic algorithm
A unit and a method for determining gains of a PID (Proportion, Integral, Differential) controller using a genetic algorithm. A genetic algorithm tuning unit decodes an output value from an object...
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5880415 |
Automatic calibration of current regulator control compensation for an elevator motor drive with locked rotor
An elevator controller 7 is provided with logic 48 which automatically calculates a proportional gain (K P ), an integral gain (K I ), and an overall gain (Gc) for a current regulator/motor drive...
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5822740 |
Adaptive fuzzy controller that modifies membership functions
A direct adaptive fuzzy controller having an adaptation mechanism that modifies the locations of output membership functions to improve performance of the fuzzy controller. The controller has a...
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