Fermentation temperature has a great impact on the quality and flavor of the beer in thebeer fermentation process. Thus it is a very important task to control the temperature preciselyin accordance with the process curve. Presently, for practical operation, PID controller ismostly used in the beer fermentation temperature control system. But traditional PIDcontroller usually falls short to meet modernized production requirements, as the controlledobject is nonlinear, large-lag and time-varying. Particle swa...