Design method of anti-saturation internal model control system based on static feed-forward compensation

Abstract

Anti-saturation internal model control system design method based on static feed-forward compensation for process industry control systems. The method includes a controller Q, a controlled object G containing a saturation link p , the internal model G of the controlled object m and three static compensators K 1 、K 2 、K 3 ; Through the static feed-forward analysis based on the original internal model control system, the controller input deviation caused by the saturation phenomenon, the controller output deviation and the controller output deviation caused by the slowdown of the object output are respectively compensated. The output response of the object is improved by introducing three compensation loops into the original internal model control system. Compared with the prior art, the present invention is based on the transfer function of the object to design the controller and compensator, which makes it easier for engineers to understand; at the same time, the present invention is different from the traditional anti-saturation internal model control idea, and uses static feedforward compensation The idea is to improve the output response of the object, which has higher achievability in practical applications.

Description

technical field [0001] The invention relates to a design method of an anti-saturation internal model control system based on static feedforward compensation, including an anti-saturation internal model control system structure and a design method of a compensator, and is mainly used in the field of control engineering. Background technique [0002] In actual industrial control, the phenomenon of input saturation is ubiquitous. For example, the maximum flow rate of a pipeline with a valve can only reach the flow value at which the valve opening is 100%, which cannot be broken through; for another example, the maximum flow rate that the pump can output can only reach the flow value at the maximum pump speed, which cannot Unlimited additions. Various practical cases show that input saturation is common in industry. [0003] However, the input saturation phenomenon has a non-negligible influence on the control effect of the control system. This is because the existence of the...

AI Technical Summary

Problems solved by technology

[0006] However, existing anti-saturation control techniques still have some shortcomings

First of all, the AWBT anti-saturation control strategy based on linear matrix inequality is mainly based on the state space model, which is difficult for engineers to understand

Secondly, the above method needs to establish a linear matrix inequality, the process is complicated, and to ensure the ideal control effect, an accurate controlled object model is required

Thirdly, Wang Jingcheng and others manually adjusted the design of the compensator, and it was difficult to ensure that the output of the object was optimal.

Images