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Performance-controllable PID controller parameter optimization and tuning method

A controller and parameter technology, applied in the direction of electric controllers, controllers with specific characteristics, etc., can solve the problems of insensitivity to optimization performance parameters, unfavorable engineering applications, etc., to achieve effective adjustment, speed up control speed, and reduce control speed Effect

Inactive Publication Date: 2018-06-19
SOUTHEAST UNIV
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Problems solved by technology

Although some improved indicators based on the above indicators are proposed, such as segmental integration, etc., the optimization performance is not sensitive to the parameters in the performance indicators, and the problem of how to effectively adjust the final optimization effect cannot be well solved, which is not conducive to engineering applications.

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Embodiment Construction

[0031] In order to describe the technical solution disclosed by the present invention in detail, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings:

[0032] Suppose the transfer function of the controlled process is The present invention will be further explained below in conjunction with the drawings.

[0033] Step 1: A single-loop negative feedback simulation control system is formed by the controlled process and PID controller, the process output is y(t), the input is the output u(t) of the PID controller, and the input of the PID controller is the process output setting The difference e(t) between the value r and y(t), t is time, the process transfer function is G(s), and the PID controller transfer function is s is a complex variable in the complex number domain, K P Is the scale factor, K I Is the integral coefficient, K D Is the differential coefficient;

[0034] Step 2: Using genetic algorithm, opti...

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Abstract

The invention discloses a performance-controllable PID controller parameter optimization and tuning method. The method comprises steps: firstly, according to a transfer function of a controlled process, the traditional critical proportional band method is adopted to tune three parameters of a proportion coefficient KP, an integral coefficient KI and a differential coefficient KD of the PID controller, and according to tuning results, an optimal value searching range of KP, KI and KD parameters are determined; and then, based on a novel optimization performance index formed by deviation and a deviation change rate and a corresponding fitness function, a genetic algorithm is adopted to optimize the three parameters of KP, KI and KD of the PID controller. Through changing the weight of the deviation change rate in the optimization performance index, the optimization effects can be adjusted conveniently and effectively, and the final PID controller control performance is optimized.

Description

Technical field [0001] The invention belongs to the technical field of automatic control, and specifically relates to a parameter optimization setting method of a performance-controllable PID controller. Background technique [0002] PID controller is widely used in process control because of its simple algorithm and good robustness. The performance of PID controller parameter optimization setting depends on the optimization performance index. Generally, the following deviation integral performance indicators are used: [0003] [0004] The disadvantage of this type of index is that the final optimization performance cannot be adjusted. Although some improved indicators based on the above indicators, such as segmented integrals, are proposed, the optimization performance is not sensitive to the parameters in the performance indicators, and the problem of how to effectively adjust the final optimization effect is not well resolved, which is not conducive to engineering application...

Claims

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Application Information

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IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 雎刚邵恩泽
Owner SOUTHEAST UNIV
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