Application Of Fuzzy-PID Control In Central Air-conditioning System

The twenty first century is a modernized city's century which is characterized by trend towords digit,network and intelligence. The development of high technology on information, computer and control make the intelligent building technology more and more mature and get widely use.Intelligent building mainly consists of building facility automatic system,communitation automatic system and office automatic system,and the first one is the basic and most important part.Air-conditioning system is a very important part of intelligent building. With the development of our economy and promotion of city transformation's level,using center Air-conditioning is more and more common;but the large energy dissipation of air-conditioning system, which take 60-70% of all makes how to save enery of this system into a focal point of building enery saving .Since 1970s to 1980s,as one of artificial intelligence control technology,the theory and technique of fuzzy control have been noticed greatly, widely used and researched by related exports and scholars.The fuzzy control technique which does not need establish exact mathematical model on passive control object, and so on has overwhelming advantages than typical control technique.The main purpose of the essay is to propose a way that applies the fuzzy control technique to air-conditioning control of intelligent building.In detailed,we choose cheep and high integrated single PIC to buil hardware and software,and use PID control and optimized fuzzy control to realized high efficiency and low dissipation which are very important for air-conditioning design in modern intelligent building.