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The Practice Research of Fuzzy Control in the Waterworks

Author: FanYi
Tutor: ZhuHong；XiaChengLie
School: Sichuan University
Course: Computer technology
Keywords: Fuzzy Control Residual chlorine Mathematical model
CLC: TP273.4
Type: Master's thesis
Year: 2004
Downloads: 184
Quote: 1
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Abstract


Chengdu Water Supply Plant is a build factories early and later expanded several times, and the transformation of the old plant, the process structure of complex multi-order pipeline network link to criss-cross. Usual, the staff can only experience water factory manual chlorine dosing event source water quality suddenly changes, changes in the amount of water, it is a loss, no start, seriously affect the finished water quality. In order to ensure that the finished water quality the residual chlorine compliance, we must establish a set of timely, reliable, convenient chlorine dosing system. With modern computer technology, the rapid development of control technology, the establishment of the water plant computer control system has also become an inevitable trend. Traditional water treatment automatic control system requirements to establish a precise mathematical model, and that it is necessary to follow some of the more demanding linear hypothesis, the actual water treatment systems, however, because of the complexity, nonlinear, time-varying, uncertainty and incomplete , etc., are generally unable to obtain a precise mathematical model and the actual assumptions consistent water treatment automatic control system of traditional control theory to practical engineering applications on water quality fluctuations. Fuzzy Control (Fuzzy Control) able to control the experience and knowledge of the operator or expert said into linguistic variables to describe the control rules, and then use these rules to control the system. Therefore, the fuzzy control is particularly applicable to the mathematical model unknown, complex, non-linear control of the system. The fuzzy logic control method is a way to simulate human thinking and human control experience to achieve the control effect. Traditional control depends on the mathematical model of the controlled system, and fuzzy control is dependent on the physical characteristics of the controlled system. In the understanding and awareness of the controlled system physical characteristics based on the practical experience of the, then experienced staff of summary, the formation of description, expressed as a set of conditional statements and inaccurate rules language. The use of these methods and rules, powerful communication functions by means of powerful computing functions of the computer software and industrial control network, the preparation of fine control and monitoring procedures, automatically adjust the chlorine dosage or interactive adjustment of parameters due to real-time monitoring of dosing the water quality of the source water mutations caused changes of Sichuan University engineering master's degree thesis, and effective control, with a good use of the foreground and the foreseeable development advantages. Keywords: fuzzy control residual chlorine mathematical model

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system > Fuzzy control, fuzzy control system
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