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Controller and control method for single-input and single-output non-self-balancing production process

A single-input, single-output, production process technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of many controller adjustment parameters, difficulty in analyzing the stability of the control system, and difficulty in modeling

Active Publication Date: 2017-08-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that in the prior art, it is difficult to model the single-input and single-output non-autonomous production process, the stability of the obtained control system is difficult to analyze, and the controller has many adjustment parameters.

Method used

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  • Controller and control method for single-input and single-output non-self-balancing production process
  • Controller and control method for single-input and single-output non-self-balancing production process
  • Controller and control method for single-input and single-output non-self-balancing production process

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specific Embodiment approach

[0168] (1) According to the process characteristics, determine the system model parameter N=80 and the sampling time T s = 1s.

[0169] (2) Select the appropriate fitting point H=24, a=1, closed-loop response time T ref =10s to verify the following formula

[0170]

[0171] Whether it is true, if not, re-select the appropriate fitting point H. If the controlled object is a time-delay object, the selected fitting point H should be greater than the lag time.

[0172] (3) seeking The optimal solution of , let H 1 =H 2 = H, then y ref (k+H)=y m (k+H)+E(k+H), get the current moment control law

[0173]

[0174] And apply the control input at the current moment to the object.

[0175] (4) k→k+1, repeat steps 2-3.

[0176] In actual operation, the operator hopes that the liquid level of column B is controlled at 60% of the total column liquid level and the fluctuation is as small as possible, and the liquid level of column B is controlled by the invented method such ...

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Abstract

The invention relates to a controller and a control method for a single-input and single-output non-self-balancing production process, which mainly solves the difficulties in modeling the non-self-balancing production process in the prior art, the stability of the obtained control system is difficult to analyze, and the controller has many adjustment parameters. The problem. The present invention adopts a single controller, and only needs to perform an impulse response test on the controlled object to obtain a prediction model of the production process. By constructing a single-degree-of-freedom control input and using a novel error feedback correction method, a prediction function control algorithm is built: (1 ) to establish single-degree-of-freedom control input: select the future system control input to be composed of a weighted basis function; (2) implement pulse signal excitation to the controlled object to obtain the process model; (3) establish the expected performance index of the future system; (4) predict the future The derivation of the output; (5) Build a special error feedback correction; (6) The stability guarantee of the control system and the technical solution of tracking the zero deviation of the set value solve this problem well, and can be used in the non-self-balancing production process operation optimization control.

Description

technical field [0001] The invention relates to a single-input single-output non-self-balancing production process controller and a control method thereof. Background technique [0002] In the actual industrial process control application, a common class of objects, that is, when the system is stimulated by an input signal, the controlled system cannot reach a new equilibrium by itself, and its process output value will continue to increase or decrease. This type of system is called is a non-self-balancing system. Common non-self-balancing objects include the liquid level of rectification towers, distillation towers, stripping towers and other devices. Whether these devices can be well controlled in actual operation to reduce the impact on downstream devices is very critical. [0003] At present, the control method for this kind of system is mainly the correction application of the conventional PID regulator, but the disadvantage of this kind of method is still that it need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04B01D3/42
Inventor 张彬刘文杰郭毅
Owner CHINA PETROLEUM & CHEM CORP
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