Complete time delay compensation control method for chemical engineering multi-variable process

A compensation control, multi-variable technology, applied in program control, comprehensive factory control, electrical program control, etc., can solve the problems of no great improvement in control performance, compensation, and inability to perform complete time delay.

Inactive Publication Date: 2015-08-26
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

Some scholars have extended it to the control of multi-variable objects, but due to the inability

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  • Complete time delay compensation control method for chemical engineering multi-variable process
  • Complete time delay compensation control method for chemical engineering multi-variable process
  • Complete time delay compensation control method for chemical engineering multi-variable process

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Embodiment Construction

[0045] The present invention is further described in detail with reference to the accompanying drawings and simulation examples. figure 1 It is a structural diagram of a complete time-delay compensation control method for a chemical multivariable process provided by the present invention.

[0046] Firstly, a model is established for the multi-variable chemical process. The process contains n inputs and n outputs. The transfer function is expressed as:

[0047]

[0048] Among them, g ij (s) is the transfer function from the jth input to the ith output.

[0049] Observe the characteristics of the object, select the decoupled generalized object matrix Q(s), if q ii If the delay time of (s) is less than or equal to the minimum delay time of object i row, then the decoupler design is performed directly. Otherwise, considering the physical realizability of the decoupling module, add the delay compensation term:

[0050] Θ = diag { ...

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Abstract

The invention discloses a complete time delay compensation control method for a chemical engineering multi-variable process. According to the control method, a control module which is used for controlling the multi-variable process to make the same meet the requirements of control indexes, a decoupling module which is used for decoupling the multi-variable processes into a plurality of independent individual variable objects, and a feedback control module which is used for rendering estimated feedback information and increasing the robustness of a system are adopted. With the complete time delay compensation control method of the invention adopted, the deficiency of incapability of a traditional control method to realize complete time delay compensation can be eliminated; (2) reverse decoupling is adopted, and the realization form of a decoupler is simple; and a filter is additionally installed in the feedback control module, so that the robustness of the system can be improved. As for the multi-variable process, the complete time delay compensation control method can realize effective control and can be popularized.

Description

technical field [0001] The invention belongs to the field of process control and relates to a complete time-delay compensation control method for multi-variable chemical process. Background technique [0002] Due to the complex reaction in the chemical process and the mutual influence and correlation between variables, for such objects, the simple single-loop control can no longer achieve the ideal control effect, and even lead to system instability. In order to eliminate the coupling effect between the variables of the multivariable process, engineers usually decouple the multivariable objects into independent single-loop objects for control. The decoupling methods adopted are generally divided into static decoupling and dynamic decoupling. The static decoupling method can only achieve decoupling in the steady state, and there is still coupling between the dynamic process variables, which cannot be completely decoupled, making the control effect unsatisfactory. In order t...

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02G05B19/4188
Inventor 靳其兵李敏王元飞王琪
Owner BEIJING UNIV OF CHEM TECH
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