Variable-parameter PID (proportion-integration-differentiation) control circuit and variable-parameter PID control method for electric steering gear

Abstract

The invention relates to a variable-parameter PID (proportion-integration-differentiation) control circuit and a variable-parameter PID control method for an electric steering gear, which belong to the technical field of automatic control. The PID control circuit comprises a filtering circuit, a PID circuit, an adding circuit, a deviation judgment circuit and an on-off switching circuit, wherein the deviation judgment circuit is used for controlling on and off of two groups of output of an analog switch in the on-off switching circuit by means of a deviation value of input signals and feedback signals of an electric steering gear closed-loop system, so that whether a parallel resistor and a parallel capacitor are inputted into the PID circuit or not are controlled, and online adjustment of PID parameters is realized. By the aid of the variable-parameter PID control circuit and the variable-parameter PID control method, the problem that the electric steering gear of an aviation guided weapon is difficult to achieve good control effect with a group of preset PID parameters in the working environment of great inertia, nonlinearity, strong interference and the like. The variable-parameter PID control circuit is reasonable in design, simple and feasible, is capable of effectively weakening systematic buffeting, increasing systematic robustness and improving control precision, and can guarantee the system to have good control quality in different control phases.

Description

technical field [0001] The invention relates to a variable parameter PID control circuit and a control method for an electric steering gear, belonging to the technical field of automatic control. Background technique [0002] PID control is the most widely used control law in automatic control. Actual operating experience and theoretical analysis show that applying this control law to most control objects can get relatively satisfactory results. However, due to the characteristics of large inertia, nonlinearity, and strong interference in the working environment of the electric steering gear on aviation guided weapons, it is difficult to achieve a good control effect with a set of pre-set PID parameters, especially when the object parameter changes exceed When the range is certain, the performance of the system will be significantly worse, even beyond many ranges. Contents of the invention [0003] The purpose of the present invention is to further improve the performance...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of large inertia, nonlinearity, and strong interference in the working environment of the electric steering gear on aviation guided weapons, it is difficult to achieve a good control effect with a set of pre-set PID parameters, especially when the object parameter changes exceed When the range is certain, the system performance will be significantly worse, even beyond many ranges

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