Reasearch On A Measure And Control System Of Indoor Environmental Comfort Level Based On Fuzzy Variable Representation

This paper designs a measure and control system of indoor environmental comfort based on fuzzy variable representation based on the requirement of sufficient investigation.First, this paper analyzes the symbolized measurement theory and the fuzzy control theory from the theory. It also explains the concepts of measurement and fuzzy symbolized measurement from a perspective of symbolized information representation. It is a process of which presents the information of fuzzy symbolized representation measured, under defined structure of measurement, using fuzzy mathematical theory and method, through special technical instrument. Then it introduces the concept of fuzzy control system and basic control ideas, and demonstrates the design approaches of fuzzy controller, and gives the general model of fuzzy control system. This paper introduces a method of evaluating indoor environmental comfort level, which is based on fuzzy variable representation.Second, this paper provides a data syncretic method of fuzzy transducer, make the data measured from transducer as input variable, and syncretic results as output variable, and make input variables and output variables fuzzy separately. And then compute and merge all of the input concurrent degrees in order to gain the whole concurrent degree. Finally, make use of the method of doing fuzzy to confirm the place of maximum concurrent degree to be the syncretic result. And it also introduces the synthesized method of fuzzy transducer comfort level, based on temperature and humidity. This method realized the consistency syncretism of fuzzy transducer, based on wholly considering the factors, such as each transducer's importance and similarity of their outputs, and so on.In the end, this paper use fuzzy control technique to control temperatureand humidity. And design a fuzzy controller of temperature and humidity, based on MSP430F449 single-chip computer to supervise temperature and humidity at all times and control automatically. Simultaneously, this paper also designs a set of measurement and control system of comfort level, adopting HYCAN Bus of HuaKong company in Beijing. And use VB language to compile control interface.