Generalized prediction control algorithm of continuous stirring tank reactor system

A generalized predictive control, reactor system technology, applied in the direction of adaptive control, general control system, control/regulation system, etc.

Inactive Publication Date: 2017-08-25
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

For nonlinear systems, the linearization method is generally used, but the linearization method has certain limitations, and most of the linear control methods cannot be directly applied to the nonlinear system

Method used

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  • Generalized prediction control algorithm of continuous stirring tank reactor system
  • Generalized prediction control algorithm of continuous stirring tank reactor system
  • Generalized prediction control algorithm of continuous stirring tank reactor system

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Embodiment Construction

[0044] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] like figure 1 and figure 2 Shown, the present invention has designed a kind of generalized predictive control algorithm of continuous stirred tank reactor system (CSTR), in practical application, specifically comprises the following steps:

[0046] Step 1. Construct the nonlinear model structure corresponding to the continuous stirred tank reactor system (CSTR) as follows:

[0047]

[0048] Among them: y represents the concentration of a reactant in the continuous stirred tank reactor system (CSTR), as the output of the continuous stirred tank reactor system (CSTR); u represents the reactant entering the continuous stirred tank reactor system (CSTR ), as the input of the continuous stirred tank reactor system (CSTR), represents the controller output in the control system design.

[0049] Then, the Taylor th...

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Abstract

The invention relates to a generalized prediction control algorithm of a continuous stirring tank reactor system. A nonlinear model is established for the continuous stirring tank reactor system and is converted into an output prediction model based on a U model. A reference trajectory is set, the generalized prediction control of the output prediction model is carried out, and a pseudo input of the system is obtained. Then a secant method is used to carry out iterative calculation to obtain an actual input of the system. According to the generalized prediction control algorithm, the combination of the secant method and the U model is used, thus when a nonlinear equation about the actual input is solved, a derivation problem in using a Newton iterative algorithm is avoided, the computation time is reduced, at the same time the convergence rate is fast, and a nonlinear system control design problem is simplified.

Description

technical field [0001] The invention relates to a generalized predictive control algorithm for a continuous stirred tank reactor system, belonging to the technical field of nonlinear system control. Background technique [0002] In the petrochemical field, the continuous stirred tank reactor (CSTR) plays an important role in the chemical reaction, and it has the advantages of low cost and strong heat exchange capacity. At the same time, it has high research value in model and control. In the CSTR process, too high or too low temperature will affect the depth of reaction and conversion rate of reaction, thus affecting the quality of products. In conclusion, the control of reactor temperature and reactant concentration has been a research hotspot in the field of chemical process control. For nonlinear systems, the linearization method is generally used, but the linearization method has certain limitations, and most of the linear control methods cannot be directly applied to ...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 丁洁周婷
Owner NANJING UNIV OF POSTS & TELECOMM
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