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Distributed state feedback control method for liquid level of four-tank water tank

A state feedback and control method technology, which is applied in liquid level control, non-electric variable control, control/regulation system, etc., can solve problems such as poor flexibility, low safety, and low reliability, and achieve smooth tracking process and anti-coupling The effect of strong performance and excellent control effect

Active Publication Date: 2017-08-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the scale of the system becomes larger, the existing centralized state feedback control has the problems of low security, poor flexibility, and low reliability

Method used

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  • Distributed state feedback control method for liquid level of four-tank water tank
  • Distributed state feedback control method for liquid level of four-tank water tank
  • Distributed state feedback control method for liquid level of four-tank water tank

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Experimental program
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Embodiment Construction

[0039] In the following, the present invention will be described in detail by taking the liquid level process control of a four-capacity water tank as an example in conjunction with the accompanying drawings.

[0040] Such as figure 1 Shown is the flow chart of the distributed state feedback control method of the present invention, wherein, the continuous time process model of the four-capacity water tank is as follows:

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[0047] Among them, h i Indicates the liquid level of tank i, Indicates the liquid level derivative of tank i, v i Indicates the speed of pump i, Indicates the rotational speed derivative of pump i, u i Indicates the speed control signal of water pump i, a i Indicates the outlet cross-sectional area of ​​tank i, A i Indicates the cross-sectional area of ​​the water tank i, g indicates the acceleration of gravity, γi Indicates the split ratio of water pump i sent to the high water t...

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Abstract

The invention discloses a distributed state feedback control method for the liquid level of a four-tank water tank. The method comprises that parameters of a distributed state feedback controller are initialized; a convex optimization problem composed of linear matrix inequalities is solved in an iteration manner, and optimal state feedback matrixes of sub-systems of a controlled object are solved; and the obtained optimal state feedback matrixes are applied to the corresponding sub-systems. Compared with centralized state feedback control, computing time of a controller is reduced under very low performance loss, and the safety, flexibility and reliability are higher; compared with dispersed state feedback control, the control quality is higher; and the distributed state feedback control method also has the advantages of high tracking speed, smooth tracking process, high anti-coupling performance and low stable-state error.

Description

technical field [0001] The invention relates to an automatic control method, in particular to a distributed state feedback control method for the liquid level of a four-capacity water tank. Background technique [0002] The liquid level of the water tank is one of the common control parameters in industrial process production. It has significant characteristics such as multivariable, strong coupling, large inertia, and nonlinearity. It is a common controlled object used to test the effectiveness of algorithms in the field of automation technology. In addition, liquid level control is reflected in many production processes, such as the automatic control process of the reaction tank of the chemical plant, the automatic drainage process of the sewage treatment plant, etc., all need to achieve the effect of automatic control by controlling the liquid level value. The control accuracy of the liquid level height of the controlled object is not only related to the quality of the pr...

Claims

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Application Information

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IPC IPC(8): G05D9/12
Inventor 潘蕾陈琛沈炯孙立李益国吴啸刘西陲
Owner SOUTHEAST UNIV
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