Optimal method for controlling mixed model of first-order reaction continuous stirred tank reactor (CSTR)

A technology of optimized control and hybrid model, applied in the direction of adaptive control, chemical/physical/physicochemical fixed reactor, general control system, etc., can solve problems such as difficulty in model verification, non-unique MLD model, etc.

Inactive Publication Date: 2011-04-20
ZHEJIANG UNIV
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Problems solved by technology

However, the MLD model method is a hybrid system modeling method based on logical relations, so it is only suitable for a type of hybrid system that switches according to the state. In addition, choosing different logic variables will also lead to non-uniqueness of the MLD model, and then for Model Validation Brings Difficulties

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  • Optimal method for controlling mixed model of first-order reaction continuous stirred tank reactor (CSTR)
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  • Optimal method for controlling mixed model of first-order reaction continuous stirred tank reactor (CSTR)

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Embodiment Construction

[0020] In order to overcome the shortcomings of traditional multi-model control and MLD model control, the present invention proposes another nonlinear system optimization control method based on a hybrid model framework. On the one hand, the present invention retains the advantages of using a hybrid model framework to synthesize several linear subsystems of a nonlinear system, so that all the dynamic characteristics of the subsystems are described under a unified framework, ensuring that the system is under a unified and overall performance index run. On the other hand, the present invention adopts the full-space discretization method, which can be applied not only to the hybrid system switched according to the state, but also to the hybrid system switched according to time. In addition, since the binary variable selection method is uniquely determined, the hybrid model established in this way only one. First, the hybrid model framework is used to synthesize several linear s...

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Abstract

The invention discloses an optimal method for controlling a mixed model of a first-order reaction continuous stirred tank reactor (CSTR). The method can ensure that the first-order reaction CSTR can rapidly, accurately, stably operate under the following two conditions: a transient process that a system is started and then operates into a certain stable operating point, and a transient process that the system converts into the other stable working point from a certain stable operating point. Compared with the existing first-order reaction CSTR control method, the method provided by the invention has obvious advantages.

Description

technical field [0001] The invention relates to a hybrid system model frame optimization control method, in particular to a hybrid system model frame optimization control method for a first-order reaction continuous stirred tank reactor (CSTR). Background technique [0002] The actual first-order response CSTR exhibits strong nonlinear characteristics. Although nonlinear control technology has made great progress in recent years, it has not yet formed a unified theory and method, and has not been well applied in industrial practice. The main reasons are as follows: First, the existing nonlinear controller design methods often require an accurate nonlinear model, but obtaining an accurate nonlinear model is not an easy task; second, even if there is an accurate nonlinear model, based on The controller design of the nonlinear model is also very complicated; in addition, the nonlinear controller also has a certain application range, and once it exceeds this range, the control ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04B01J19/18
Inventor 宋春跃王林涛
Owner ZHEJIANG UNIV
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