Anti-saturation internal model control system design method based on static-state feedforward compensation

A technology of static feed-forward and design method, which is applied in general control system, control/regulation system, adaptive control, etc., and can solve problems such as difficulty in guaranteeing object output, difficulty in understanding by engineers, and complex process

Inactive Publication Date: 2015-09-09
BEIJING UNIV OF CHEM TECH +1
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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 esta

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  • Anti-saturation internal model control system design method based on static-state feedforward compensation
  • Anti-saturation internal model control system design method based on static-state feedforward compensation
  • Anti-saturation internal model control system design method based on static-state feedforward compensation

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] This example takes the first-order pure lag (FOPDT) object as an example, and introduces the design method of anti-saturation internal model controller based on static feedforward compensation in detail. The transfer function of the studied FOPDT object is

[0050] G p ( s ) = 3 5 s + 1 e - 2 s

[0051] This object has an input saturation value of ±0.5.

[0052] Step 1: Design the basic internal model controller first. Assuming that there is no error in the transfer function between the model and the object, that is

[0053] G m...

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Abstract

The invention provides an anti-saturation internal model control system design method based on static-state feedforward compensation. The method is used for a process industrial control system. The method comprises a controller Q, a to-be-controlled object GP containing saturation elements, an internal model Gm of the to-be-controlled object and three static-state compensators K1, K2 and K3. By performing static feedforward analysis on the basis of original internal model control system, compensation is performed for controller input bias, controller output bias, which are caused by saturation phenomena, and controller output bias caused by slowing down of output of the object. By leading in 3 compensation loops in the original internal model control system output response of the object is improved. Compared with the prior art, according to the invention, controller and compensator design is performed based on transfer function of the object, so an engineer can know the method more easily. Meanwhile, the method, which improves the output response of the object via the static feedforward compensation idea, is different from the traditional anti-saturation internal model control idea, so the method is highly realizable in actual application.

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...

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Application Information

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IPC IPC(8): G05B13/04
Inventor 靳其兵戚林锋王琪周星
Owner BEIJING UNIV OF CHEM TECH
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