Design of VAV BOX Controller Based on Fuzzy-PID Hybrid Control

Hybrid fuzzy-PID controller is a controller that makes fuzzy and PID controller in parallel, it adopts fuzzy control when away from the operating point taking the advantages of solving the nonlinear uncertainty with fuzzy controller. And it adopts PID control around the work area by using PID to control the characteristics of high precision. The fuzzy PID controller is applied to the VAV BOX for many factors influenced by VAV terminal control. It effectively solves the problems of the VAV air conditioning system which is lag, big inertia, random interference and nonlinear. In addition it is verified in the VAV air conditioning test platform, and achieves the expected control effect.