A closed-loop dynamic matrix control method for continuous stirring reactor

A stirring reactor and closed-loop dynamic technology, which is applied in the direction of electric controllers and controllers with specific characteristics, can solve problems such as unreachable dynamic characteristics, and achieve the effects of improving closed-loop dynamics, suppressing reverse response, and simple parameter adjustment

Active Publication Date: 2022-04-01
ZHEJIANG UNIV
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Problems solved by technology

Although the stability of the dynamic matrix control algorithm in these methods has been well guaranteed, the closed-loop dynamic results of these methods have a qualitative relationship but not a quantitative relationship because the controller parameters have only a qualitative relationship with the closed-loop dynamic results. Performance is also often not up to the desired dynamic characteristics

Method used

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  • A closed-loop dynamic matrix control method for continuous stirring reactor
  • A closed-loop dynamic matrix control method for continuous stirring reactor
  • A closed-loop dynamic matrix control method for continuous stirring reactor

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specific Embodiment approach

[0052] Step 2, calculate the feed-forward response model offline. Its specific implementation is as follows:

[0053] Step 2-1, firstly determine the desired closed-loop response model, which is set as a step process in this example so as to demonstrate the closed-loop tracking characteristics of the present invention.

[0054] Step 2-2, Solve the optimization problem

[0055]

[0056] s.t.

[0057]

[0058]

[0059] in Represents the feed-forward response model that needs to be optimized, Σ represents the summation, Indicates the jth parameter of the step response model of the process object, Indicates the i-th parameter of the expected closed-loop response model, N m Indicates the model length, which is set to 21 in this example, and β indicates the stability coefficient, which is set to 0.05 in this example.

[0060] Step 2-3, according to the feed-forward response model obtained in step 2-2, determine the actual closed-loop response model in, Indicates ...

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Abstract

The invention discloses a closed-loop dynamic matrix control method for a continuous stirring reactor, comprising the following steps: (1) performing a step test on the reaction process of the continuous stirring reactor to obtain a model of the process object; (2) calculating Feed-forward response model, construct generalized process object; (3) collect the input and output of process control, construct optimization problem, calculate the input of generalized process object; (4) convert the input of generalized process object into the input of process object; (5) ) Repeat step (3) and step (4), realize the process control to continuous stirring reactor. The invention can realize the control of the process object, the method used in the invention has good robustness and stability, improves the dynamic characteristics of the control of the continuous stirring reactor, and improves the economic benefit.

Description

technical field [0001] The invention relates to the field of control algorithms in industrial process control systems, in particular to a closed-loop dynamic matrix control method for continuous stirring reactors. Background technique [0002] Model predictive control technology is a kind of model-based computer control method produced in the 1970s, and after more than 40 years of development, it has become the most successfully applied modern advanced control technology in the process industry after PID. Model predictive control technology has the ability to deal with problems such as multi-variable coupling and constraints on output and intermediate variables, and provides an effective solution for multi-variable, constrained complex industrial processes. [0003] As one of the representatives of model predictive control technology, the dynamic matrix control algorithm was first proposed by the American Shell engineer Cutler at the Automatic Control Conference in 1980 and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 谢磊石尧张志铭
Owner ZHEJIANG UNIV
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