The Research Of Intelligence Control Used In The VAV Air-Conditioning System

Variable-Air-Volume Air-Conditioning System is an all air system with remarkable energy-saving and good comfort. In order to ensure the effect of energy-saving and keep system stability, its running course need proper control methods. But as to such a complex system hard to control, both classic control and modern control are difficult to fit the need fully. So it is necessary to make use of Intelligence Control to realize completely. It is a task of great significance to introducing Intelligence Control into the field of Variable-Air-Volume System control. In this thesis, I have not only studied the fuzzy control design in VAV Terminal, but also probed into eliminate the coupling between the the two loops of the unit side (pressure loop and fresh air loop) by appling PID-ANN decoupling control. The major work what have been finished are:1. On the basis of clarifying VAV air-conditioning and its control system, I analysis the characteristics of VAV system, and point out that intelligent control is the effective way of solving its control problems.2. I have designed a fuzzy controller of double dimensions by the fuzzy control theory for VAV Terminal, so as to accomplish the task of indoor temperature control. Then I use the simulating toolbox of matlab to Simulate and Analyse, the simulating result indicates that no matter what the influence exist or not, indoor temperature can be controlled around the set point, its fluctuation is also within the acceptable scope.3. As to the the two loops of the unit side having strong coupling, I have applicated PID-ANN decoupling control to eliminate the coupling between them. By the simulating of Matlab to study its effect, the first step testifies that this technology can eliminate the coupling between the two loops effectively, and ensure the system operating stably.4. According to my level of understanding and relevant information, I design a experiment installation of Intelligent control for VAV Air-Conditioning System to meet the need of research.