Continuous stirred reactor system control method based on Hammerstein model

Abstract

In order to solve the problem of reactant concentration control of a chemical reaction system in a process industry, the present invention provides a continuous stirred reactor system control method based on a Hammerstein model. Using the Hammerstein model, a highly precise mathematical model for a continuous stirred reactor system is established; and applying a combined signal source, parametersof each serially connected model are estimated, thus designing a controller with a special structure of the model. The method firstly, according to input-output data of a separable signal, adopts a correlation analysis method to estimate parameters of a dynamic linear module in the model. Secondly, based on the input-output data of a random signal, parameters of a static nonlinear module in the model are estimated through a clustering method and a stochastic gradient method. Finally, using the special structure of the Hammerstein model, the problem of reactant concentration control of the continuous stirred reactor system is converted into a linear system control problem, thereby simplifying design of a control system and achieving a good control effect.

Description

Technical field [0001] The invention belongs to the field of process industry, and is a continuous stirring reactor system control method based on the Hammerstein model. The method is suitable for chemical industry, biological pharmacy, petroleum production and other related fields. Background technique [0002] Continuous Stirred Tank Reactor (CSTR) is a typical, highly non-linear chemical reaction system in the process industry. The reactor where the reaction takes place plays a very important role, and its operating conditions directly affect the efficiency and quality of production Standard, the current continuous stirred reactor system control technology has become one of the key areas of research. In order to ensure the normal progress of the reaction, some key process parameters such as concentration, pressure, temperature, etc. in the reactor need to be controlled to stabilize the system. [0003] The most commonly used method in the continuous stirred reactor system contr...

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Problems solved by technology

[0006] 2. In terms of parameter estimation of the continuous stirring reactor system, the existing parameter estimation methods often contain product terms of system parameters, and decomposition techniques are required to realize the separation of parameters, which increases the complex...

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