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PI control method of interval-uncertain water tank liquid level control system

A technology of liquid level control and control method, which is applied in the field of automation technology and modern control to achieve the effect of enhancing stability, ensuring production efficiency and improving performance

Pending Publication Date: 2022-06-28
HANGZHOU DIANZI UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the liquid level needs to be controlled in life and production, and use the multi-capacity water tank control system device to study the water tank liquid level control system, and provide an interval uncertain water tank liquid level control system with external disturbance input PI control method

Method used

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  • PI control method of interval-uncertain water tank liquid level control system
  • PI control method of interval-uncertain water tank liquid level control system
  • PI control method of interval-uncertain water tank liquid level control system

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Embodiment Construction

[0095] The present invention will be further described below in conjunction with specific examples.

[0096] like figure 1 and 2 As shown, the PI control method of the water tank liquid level control system based on the modeling of the positive switching system with external disturbance input of the present invention. The specific steps of the method of the present invention include the following:

[0097] Step 1. Establish a positive switching system state space model of a multi-capacity water tank liquid level control system with external disturbance input;

[0098]

[0099] y(t)=C σ(t) x(t)+F σ(t) ω(t)

[0100] in, represents the amount of water in the tank at time t, represents an operation that takes the derivative of a vector x(t), is the water flow of r controllable valves at time t, represents the amount of water flowing out of the water tank collected by s sensors at time t, Represents the external disturbance to the water tank liquid level control s...

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Abstract

The invention discloses a PI control method of an interval uncertain water tank liquid level control system with external disturbance input. The method comprises the following steps: firstly, establishing a state space model of the water tank liquid level control system by utilizing a positive switching system with external disturbance input; a PI controller of an interval uncertainty positive switching system with external disturbance input is designed by means of a multiple linear complementary positive Lyapunov function and a matrix decomposition technology, so that the liquid level of a multi-capacity water tank system is reasonably controlled, and normal and smooth life and production of people are guaranteed. Almost all systems have uncertainty, and the uncertainty of the system can damage the performance of the system and even lead to instability of the system. Therefore, it is necessary to design the PI controller based on the interval uncertainty system, and the production benefit of an actual control system is guaranteed.

Description

technical field [0001] The invention belongs to the field of automation technology and modern control, and relates to the modeling of a multi-capacity water tank liquid level control system based on an interval uncertain positive switching system and a PI control method with external disturbance input. Background technique [0002] In my country, with the development of society, automatic control has been implemented very early. In my country, the liquid level control system has also been widely used. The liquid level control system is a common process control in the industry, and its impact on production cannot be ignored. Liquid level control generally exists in our daily production and life, such as the water supply of water towers, when the water level in the water tower is too low, it cannot meet the needs of continuous water supply, affecting people's normal production and life; in order to ensure the normal operation of the boiler, it is necessary to maintain The boi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 周晓月曹宇张俊锋
Owner HANGZHOU DIANZI UNIV
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