Abstract: As the controlled object is hi-temp Muffle resistance furnace, the paper mainly discusses how to combine variable universe algorithm and fuzzy-PID control algorithm in the temperature-rise period of Hi-temp Muffle resistance furnace to achieve variable universe fuzzy-PID control. The variable universe fuzzy-PID control can ensure the faster response, less overshoot and better ability of anti-jamming in the harsh temperature environment. In the end, it designs a variable universe fuzzy-PID controller which based on variable universe fuzzy-PID algorithm and simulates the whole system in the Simulink environment on Matlab, compares variable universe fuzzy-PID with fuzzy-PID, the simulation experiment proves the variable universe fuzzy-PID has better performance parameter and control effect.

Key words: hi-temp Muffle resistance furnace, variable universe, fuzzy control, PID, simulation