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Limsting PID control method of single input single output system

A single-input, single-output, control method technology, applied to controllers with specific characteristics, adaptive control, electric controllers, etc.

Inactive Publication Date: 2006-06-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, there is still a certain error between the Maclaurin PID controller and the original controller before approximation

Method used

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  • Limsting PID control method of single input single output system
  • Limsting PID control method of single input single output system
  • Limsting PID control method of single input single output system

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Embodiment

[0051] The control method proposed by the present invention is used in the automatic control system of the papermaking production process, and its purpose is to produce paper with constant weight. The so-called quantitative here is the weight of paper per square meter. The control object of the system is a typical fourdrinier paper machine. In the papermaking process, the medium-consistency pulp sent from the beating section is mixed with the recovered white water under the wire to become low-consistency pulp suitable for online feeding, which is transported to the headbox, which can be the input of the paper machine. Then it is sprayed from the outlet of the slice plate of the headbox to the net, and the pulp is filtered on the net to remove most of the water to form a wet paper sheet and then enter the press section. Most of the remaining moisture then enters the drying section and is heated in a series of drying cylinders filled with high-temperature steam, so that the moi...

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PUM

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Abstract

A method for controlling limit PID of single input / single output system includes carrying out identification on object after A / D conversion for obtaining digital signal of sampling signal, ensuring four parameters corresponding to PID controller to be position value by regulating bottom limit of controller parameters, judging polarity of digital amount input signal and calculating error signal according to it, calculating parameter value of limit PID controller and calculating increment value being sent to executor after D / A conversion for operating controlled object in set range.

Description

technical field [0001] The invention relates to a method in the technical field of industrial process control, in particular to a limit PID control method for a single-input single-output system. Background technique [0002] The purpose of the PID controller tuning method is to obtain the best proportional, integral, and differential control time constant items, so that the closed-loop response of the actual process is as good as possible consistent with the ideal closed-loop response. At present, the most used PID controller tuning method is still based on the traditional empirical method. However, the traditional tuning methods based on experience only use part of the information of the system dynamic characteristics, and cannot design the controller according to the specified performance and robustness. In recent years, the controller design method based on IMC control structure has been widely valued because it makes full use of the dynamic characteristic information o...

Claims

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Application Information

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IPC IPC(8): G05B13/00G05B11/42
Inventor 张卫东陈培颖曹春生尹汝泼赵青
Owner SHANGHAI JIAO TONG UNIV
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