There is a deviation between the actual value and the target value of the oil pressure of the wet clutch during the power shifting process of the tractor.This study adopts the Fuzzy Immune PID(FIPID)control method to achieve follow-up control of the clutch oil pressure.A mathematical model of the wet clutch drive mechanism is constructed,and a Fuzzy Immune PID controller for the wet clutch is designed.Control and hydraulic models are established based on MATLAB/Simulink and AMESim platforms,and simulation analysis is carried out for the engagement process.The simulation results show that under a square wave signal,the Fuzzy Immune PID has a dynamic response time of only 0.069 s,and the steady-state error under a sine wave signal is±0.020 1 MPa.The tracking control effect is better than that of PID and Fuzzy PID,achieving effective tracking control of the clutch pressure.Under transportation conditions,compared with PID and Fuzzy PID,the maximum impact degree of the Fuzzy Immune PID is reduced by 43％and 29％respectively,and the sliding friction power is increased by 18％and 2％respectively.Under plowing conditions,compared with PID and Fuzzy PID,the maximum impact degree of the Fuzzy Immune PID is reduced by 53％and 38％respectively,and the sliding friction power is increased by 4％and 2％respectively.
维普
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