Control system parameter self-tuning method

A parameter self-tuning and control system technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve the problems of complex implementation process, lack of rapidity, affecting the effect of system tuning, etc., to make up for complex algorithms, Clearly control the performance indicators, the effect of high repeatability

Active Publication Date: 2021-11-16
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004]The purpose of this invention is to solve the existing model-based self-tuning method, which needs to rely on an accurate system model. If the certainty of the system parameters and the identification accuracy are insufficient, it will Affects the system tuning effect, while the rule-based self-tuning method needs to use intelligent control algorithms to realize the optimization of control parameters. There are technical problems in the implementation process, such as complex implementation process and insufficient rapidity. A self-tuning method for control system parameters is provided

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[0055]The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0056] A control system parameter self-tuning method, such as figure 1 shown, including the following steps:

[0057] 1) Correction of control performance indicators

[0058] 1.1) According to the following square wave function, generate a system given signal y with a duty cycle of 50%, a square wave amplitude of a, and a square wave period T that is 10 times greater than the rise time required by the control system input :

[0059]

[0060] Among them, mod(*) is a remainder operation;

[0061] 1.2) Conduct control performance teaching (demonstration), and record control performance indicators according to the teaching results

[0062] Specifically: the system given signal y generated in step 1.1) input As the control setting, adjust the control parameter K of the control system so that the control system can achieve the expected performance. Acc...

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Abstract

The invention relates to a control system parameter self-tuning method, and aims to solve the technical problems that the system tuning effect is influenced if the certainty and identification precision of system parameters are insufficient in the conventional model-based self-tuning method, and the rule-based self-tuning method is complex in implementation process and insufficient in rapidity. The method comprises the following steps: 1) correcting a control performance index; 2.1) calculating a control performance index in real time; 2.2) taking a system given signal as input, combining results obtained in the step 1) and the step 2.1), and adjusting a control system parameter updating rate parameter alpha and a control system parameter penalty parameter beta in an equation to achieve an optimal self-tuning rate; 3) storing alpha and beta corresponding to the optimal self-tuning rate as self-tuning parameters of the control parameter K; and 4) performing self-tuning on the control parameter K of the control system by utilizing a system given signal and combining the corrected control performance index Amod and the self-tuning parameter.

Description

technical field [0001] The invention relates to a parameter self-tuning method, in particular to a parameter self-tuning method for a control system. Background technique [0002] In the field of control technology, due to different system parameters, such as the inertia of the controlled object, sensor noise and friction, etc., there are differences in varying degrees, so it is necessary to debug the control parameters of the control system to meet the accuracy requirements of the system control. PI (proportional-integral control law) is a commonly used correction algorithm for control systems. This method needs to be debugged step by step to meet the control performance requirements. However, the iteration of control parameters in the debugging process takes a lot of time. With the application of high-performance microprocessor in the control system, it provides convenience for the self-tuning of the control parameters in the control system. [0003] Existing parameter se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042Y02P90/02
Inventor 井峰马彩文冯旭斌谢梅林刘鹏廉学正曹钰
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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