Closed-loop dynamic matrix control method for continuous stirring reaction kettle

A technology of stirring reaction kettle and closed-loop dynamic, which is applied in the direction of electric controller, controller with specific characteristics, etc., can solve the problem of unable to achieve dynamic characteristics, and achieve the effect of improving closed-loop dynamic, suppressing reverse response, and simple parameter adjustment.

Active Publication Date: 2021-07-09
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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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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  • Closed-loop dynamic matrix control method for continuous stirring reaction kettle
  • Closed-loop dynamic matrix control method for continuous stirring reaction kettle
  • Closed-loop dynamic matrix control method for continuous stirring reaction kettle

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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 reaction kettle. The method comprises the following steps of: (1) carrying out step test on a reaction process of the continuous stirring reaction kettle to obtain a model of a process object of the continuous stirring reaction kettle; (2) calculating a feedforward response model, and constructing a generalized process object; (3) collecting input and output of process control, constructing an optimization problem, and calculating input of a generalized process object; (4) converting the input of the generalized process object into the input of a process object; and (5) repeating the step (3) and the step (4) to realize process control on the continuous stirring reaction kettle. By utilizing the method, control over the process object can be realized, the method used in the invention has high robustness and stability, the dynamic characteristic of the continuous stirring reaction kettle control is improved, and the economic benefit is improved.

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 Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 谢磊石尧张志铭
Owner ZHEJIANG UNIV
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