PID control method, device, equipment and system

Abstract

The invention discloses a PID control method, which comprises the steps of differencing an input signal and an output signal of a controlled object and obtaining an error signal; judging whether the error signal is larger than a preset error threshold value or not; if the error signal is larger than the preset error threshold value, calculating to obtain a first PID control quantity as a total control quantity through adopting a first PID control algorithm with the integral adjustment function; if the error signal is not larger than the preset error threshold value, calculating to obtain a second PID control quantity through adopting a second PID control algorithm without the integral adjustment function; calculating to obtain a compensation control quantity through adopting a preset compensation algorithm, and adopting the sum of the second PID control quantity and the compensation control quantity as a total control quantity; outputting the total control quantity to the controlled object so as to adjust the output signal of the controlled object. The PID control method provided by the invention is high in adjusting speed, high in control precision and good in control performance.The invention further discloses a PID control device, equipment, a system and a computer readable storage medium, wherein the above beneficial effects are realized.

Description

technical field [0001] The present application relates to the technical field of automatic control, in particular to a PID control method, device, equipment, system and computer-readable storage medium. Background technique [0002] PID control has the advantages of simple structure, good stability, and reliable operation. It is still the most commonly used control method in industrial process control. [0003] The classic PID control method includes proportional regulation, integral regulation and differential regulation at the same time. Since the integral regulation often causes problems of overshoot or oscillation, an integral-separated PID control method appears in the prior art. The main principle is that the integral adjustment is not used when the error is large, so as to avoid the control amount being too large due to the accumulation of errors; and the integral adjustment is used when the error is small, so as to use the advantage of the integral adjustment to ach...

AI Technical Summary

Problems solved by technology

However, this method cancels the function of integral adjustment in the early stage of adjustment, that is, when the error is large, thus reducing the adjustment speed of the system

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