Intelligent integration method for anti-integral windup and overshoot suppression of PID (Proportional, Integral and Derivative) control system

A technology of control system and integration method, applied in the field of intelligent integration, can solve the problems of complex parameter determination, achieve the effect of simple tuning, improved dynamic response performance, and clear physical meaning

Active Publication Date: 2014-12-31
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

[0008] Aiming at the complex parameter determination and even system stability problems in the anti-saturation and overshoot suppression methods in the prior art, a ...

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  • Intelligent integration method for anti-integral windup and overshoot suppression of PID (Proportional, Integral and Derivative) control system
  • Intelligent integration method for anti-integral windup and overshoot suppression of PID (Proportional, Integral and Derivative) control system
  • Intelligent integration method for anti-integral windup and overshoot suppression of PID (Proportional, Integral and Derivative) control system

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[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] Such as figure 1 Shown is the structural diagram of the anti-saturation overshoot intelligent integral method PID control system of the present invention. Among them, the output of the anti-saturation overshoot intelligent integral method PID controller is the control signal u ( t ), used to control the controlled object, r ( t ) is the system setting input, y ( t ) is the output of the system, e ( t ) is the deviation signal, v ( t ) is the actual output signal of the actuator, x ( t) is the actuator overrun signal.

[0040] The key point of the present invention i...

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Abstract

The invention discloses an intelligent integration method for anti-integral windup and overshoot suppression of a PID (Proportional, Integral and Derivative) control system. The intelligent integration method comprises the following steps: according to a set input valve r(t) and an output value y(t) of the system, calculating an error signal value e(t); judging whether an actually input signal of a controlled object has a measured value v(t) or not: when the actually input signal of the controlled object has the measured value v(t), calculating an executor over-limit signal x(t) according to a control signal u(t) output by a controller and the measured value v(t), and when the actually input signal of the controlled object does not have the measured value v(t), setting an executor limit value; setting an anti-integral windup parameter alpha for an integral error signal to eliminate system oscillation caused by executor over-limit; setting an overshoot suppression parameter beta for the integral error signal to suppress system step response overshoot caused by an integral action. The intelligent integration method for anti-integral windup and overshoot suppression of the PID control system not only can resist windup and suppress overshoot, but also does not change the original system stability, and has the advantages that the parameters are simple to set and the real-time high-accuracy quick control of the control system is easy to realize.

Description

technical field [0001] The invention relates to the technical field of control, in particular to an intelligent integral method for resisting integral saturation and suppressing overshoot in a PID control system. Background technique [0002] The purpose of industrial controller design is to make the controlled object operate according to the required indicators, or to make the controlled object have the desired response. In the actual control system, there are often various restrictions, such as restrictions on temperature, pressure, flow and liquid level in process control, and restrictions on voltage, current, torque and speed in motor systems. In addition, the controlled object sometimes needs to switch from one control mode to another, such as switching from manual control to automatic control, time-varying load model control and variable structure control. As a result, the output of the controller is not equal to the actual input of the controlled object, and the resp...

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Application Information

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IPC IPC(8): G05B13/04
Inventor 陈永会谭功全
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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