Continuous stirred reactor system control method based on Hammerstein model

A technology of a reactor system and a control method, which is applied in the field of continuous stirring reactor system control, can solve the problems of a large amount of calculation, a complex control law, an increase in the complexity of the calculation and the difficulty of parameter estimation, etc.

CN110221540AActive Publication Date: 2019-09-10JIANGSU UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-09-10

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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.
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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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Embodiment Construction

[0053] The present invention will now be described in detail with reference to the drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic way, so it only shows the structure related to the present invention.

[0054] Such as figure 1 As shown, a continuous stirred reactor system control method based on the Hammerstein model includes the following steps:

[0055] First, in a continuous stirred reactor system, F 0 = 34.3 (L / h) and C B0 =1.12 (mol / L) are the steady-state values ​​corresponding to the reaction at a steady-state operating point, where F 0 Indicates the steady state value of flow, C B0 Indicates the steady-state value of the concentration of reactant B. The present invention uses a composite signal composed of a binary signal and a random signal as the input of the system. When using the Hammerstein model to establish a high-precision mathematical model of the continuous stirred reactor...