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Decoupling control method of non - square matrix system in industrial process

A non-square system, decoupling control technology, applied in the field of industrial process control, can solve the problems of increasing the difficulty of controller design, increasing the cost of control, and not discussing the controlled object of the zero point of the right half plane.

Inactive Publication Date: 2007-07-25
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

The disadvantages of this control method are: adding input or output will increase the cost of control; and deleting input or output will reduce the quality of control; even some non-square objects will contain non- The minimum phase phase, which increases the difficulty of the controller design
Its disadvantage is that the controller in the article is derived based on the static gain matrix of the process. This static decoupling control method is not suitable for occasions with high decoupling performance requirements.
Moreover, the paper does not discuss the plant with right half plane zero

Method used

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  • Decoupling control method of non - square matrix system in industrial process
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Embodiment Construction

[0068] An embodiment of the present invention is described in detail below: this embodiment is implemented under the premise of the technical solution of the present invention, has provided detailed implementation and specific operation process, but protection scope of the present invention is not limited to the following Example. It can be implemented in various deformations without departing from the basic spirit of the present invention and without exceeding the scope involved in the essence of the present invention, and can be widely used in the production processes of industries such as petrochemical, metallurgy, medicine, building materials and textiles.

[0069] As shown in Figures 1 and 2, the design and parameter setting method of the non-square decoupling controller provided by the present invention are implemented for the Shell standard control problem:

[0070] On the basis of the existing internal model control method, the traditional internal model control struct...

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Abstract

A decoupling-control method of non-square system in industrial process includes modifying internal model control structure to add a one order filter in feedback loop of system out for increasing robust stability of system, using relevant function means of pair non-square course to derive internal mode controller, eliminating unstable factor in said controller by adding compensation item and approximating finally obtained internal model controller to be low order controller being realized easily.

Description

technical field [0001] The invention relates to the technical field of industrial process control, in particular to a decoupling control method for non-square systems in industrial processes. Background technique [0002] The multiple-input multiple-output system is a common controlled object in the industrial production process, and the system in which the number of inputs is not equal to the number of outputs is called a non-square system. For example, fractionation tower control and Shell standard control in some petroleum and chemical industries are all non-square systems. The traditional control method of controlling such objects is to transform the non-square system into a system with a square matrix form by adding or deleting inputs or outputs, and then use the general method for MIMO systems to control. The disadvantages of this control method are: adding input or output will increase the cost of control; deleting input or output will reduce the quality of control; ...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 陈培颖张卫东蔡秋花刘媛媛王萍
Owner SHANGHAI JIAO TONG UNIV
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