Temperature Control System of LNB Based on Fuzzy Controller

According to the characteristics of nonlinearity,large delay and unprecision physical model and requirements for temperature control in the low noise block(LNB)down converter temperature system,a novel bi-fuzzy control method with proportional-integral-tuning unit,which optimizes the control rule by adjusting factors,is developed to realize the temperature control for LNB.Moreover,its implementation with DSP TMSLF2407A is also given.Smooth actions of the controller during switching are guaranteed by using fuzzy inference.The experimental results show that the bi-fuzzy controller is much better than the conventional PID controller,and can meet the design requirements for the LNB temperature controller.