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Multivariable prediction control PID control method for oil-refining heating furnace pressure

A technology of predictive control and control method, applied in the field of automation

Inactive Publication Date: 2015-12-16
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-variable predictive control PID control method for the furnace pressure of the oil refining heating furnace aiming at the deficiencies of the existing chemical process system control technology

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  • Multivariable prediction control PID control method for oil-refining heating furnace pressure
  • Multivariable prediction control PID control method for oil-refining heating furnace pressure
  • Multivariable prediction control PID control method for oil-refining heating furnace pressure

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Experimental program
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Embodiment Construction

[0085] Take the furnace pressure process control of oil refining heating furnace as an example:

[0086] In the furnace pressure control process of the oil refining heating furnace, the adjustment means is to adjust the opening of the flue baffle.

[0087] Step 1, establish the extended non-minimum state space model of the controlled object, the specific steps are:

[0088] 1.1 By collecting the real-time input and output data of the controlled object, the multi-input and multi-output system model is established by using the least square method. The form is as follows:

[0089] Y(k+1)+L 1 Y(k)+L 2 Y(k-1)+...+L n Y(k-n+1)=S 1 U(k)+S 2 U(k-1)+...+S n U(k-n+1)

[0090] Among them, Y(k) represents the q-dimensional output value of the prediction system model at time k, U(k) represents the p-dimensional input at time k, and L 1 , L 2 ,...,L n is the scalar coefficient to be identified, S 1 ,S 2 ,...,S n is the q×p matrix to be identified.

[0091] Y ...

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Abstract

The invention discloses a multivariable prediction control PID control method for oil-refining heating furnace pressure. The method id characterized in that a state space model of a oil-refining heating furnace pressure object is firstly established based on real-time multi-input and multi-output data of the oil-refining heating furnace pressure object, then an extended non-minimum state space model based on a state process and an output error is established. Based on the model, parameters of a PID controller are optimized by a prediction function control method, and finally, PID control over the controlled object is realized. According to the invention, defects of a conventional control mode are overcome, the good control performance is ensured, the simple mode of PID control is realized, and a good control effect on multiple variables is realized.

Description

technical field [0001] The invention belongs to the technical field of automation, and relates to a proportional-integral-differential (PID) control method for furnace pressure in an oil refining heating furnace based on predictive function control optimization, in particular to a multivariable predictive control PID control method for furnace pressure in an oil refining heating furnace. Background technique [0002] The chemical process is an important part of my country's process industry process, and its requirement is to supply qualified industrial products to meet the needs of my country's industry. In the current industrial control, because the traditional PID control technology has the advantages of simple structure, good robustness, and easy operation, it has been widely used in the industry. Furnace furnace of oil refining heating furnace is a typical multiple-input multiple-output (MIMO) object. The traditional PID control theory for multi-variable objects has a co...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 张日东吴胜王玉中王俊宏
Owner HANGZHOU DIANZI UNIV
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