Direct Feedback Linearization Based Control in Variable Air Volume air-conditioning System

In this paper a state space model of VAV air-conditioning system is developed. It is found that the dynamic model is formulated as nonlinear system. To obtain good control performance, a novel control method, direct feedback linear (DFL) is applied for the nonlinear model of VAV air-conditioning system. Then DFL control system of VAV system is designed and simulated based on SIMLINK. In order to show that the DFL control strategy has better performance than conventional PID control, a comparison has also been made between the performance of conventional PID and the novel control strategy. The results show that DFL control system is better than conventional PID control system in celerity, stability and other aspects.