Optimized PI (Proportional Integral) controller parameter engineering setting method

A technology of engineering tuning and controller, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of fast setting value, poor stability and robust control performance, etc.

Active Publication Date: 2016-10-26
SOUTHEAST UNIV
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Problems solved by technology

At present, the traditional PI controller parameter engineering tuning method mostly adopts the Z-N method proposed by Zielger and Nichols. This method can obtain the initial tuning parameters, but the control performance of the tuning values ​​is not good in terms of rapidity, stability, and robustness.

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  • Optimized PI (Proportional Integral) controller parameter engineering setting method
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  • Optimized PI (Proportional Integral) controller parameter engineering setting method

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Embodiment Construction

[0024] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0025] Step 1: A single-loop negative feedback control system is composed of a thermal process and a proportional-integral (PI) controller. The input of the thermal process is the output u(t) of the PI controller, the output is y(t), and the input of the PI controller is is the difference between the thermal process output set value r and y(t), t is time, and the thermal process transfer function is K is the steady-state gain of the process, T 0 is the time constant, n is the order of the process, s is the complex variable in the complex domain, and the transfer function of the PI controller is K P is the proportional coefficient, K I is the integral coefficient;

[0026] Step 2: The lag time and inertia time range of general industrial process is τ∈(0,450) seconds, T c ∈(10,750) seconds, the transfer function model T0 corresponding to this range...

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Abstract

The invention provides an optimized PI (Proportional Integral) controller parameter engineering setting method. The method adopts a genetic algorithm optimization technology, optimized PI controller parameters corresponding to different thermal processes are acquired by simulation, a PI controller parameter engineering setting model is established by taking the optimized PI controller parameters as a sample and adopting a neural network technology, and engineering setting of the PI controller parameters is thus realized, so that the shortcomings of the traditional PI controller parameter engineering setting method are effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of thermal automatic control, and in particular relates to an optimized PI controller parameter engineering setting method. Background technique [0002] The automatic control of thermal process is a necessary measure and means to ensure the safe and economical operation of thermal equipment. At present, the control strategy widely used in the automatic control of thermal process is PID control. Its algorithm is simple and robust. More sensitive, so the application of PI controller is more extensive. [0003] PI controller parameters have a great influence on the control performance. The engineering setting method of PI controller parameters is widely used in engineering because of its simplicity and convenience. At present, the traditional PI controller parameter engineering tuning method mostly adopts the Z-N method proposed by Zielger and Nichols. This method can obtain the initial tuning parameters, bu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 雎刚钱晓颖
Owner SOUTHEAST UNIV
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