Abstract: In response to the problem of low adjustment and control accuracy of the existing attitude adjustment system for tillage equipment in hilly and mountainous areas under complex operating conditions, which led to poor stability and safety of the equipment operation,based on the lateral attitude adjustment system of the equipment, a set of attitude adjustment system suitable for hilly and mountainous tillage operations was designed using the fuzzy PID control algorithm. Compared with the conventional PID control algorithm, based on the dynamic modeling of the attitude adjustment system, simulation analysis was conducted using MATLAB. The results showed that the lateral attitude adjustment time of the conventional PID control algorithm was 4.5 seconds, and the overshoot of the lateral attitude angle was 0.89°;the lateral attitude adjustment time of the implement using the fuzzy PID control algorithm was 1.9 seconds, and there was basically no overshoot of the lateral attitude angle. The simulation test results had verified the feasibility, correctness, and scientificity of the attitude adjustment system of the equipment. The accuracy and stability performance of the adjustment system met the requirements of complex working conditions in hilly and mountainous cross slope operations.

Key words: hilly and mountainous areas, tillage equipment, attitude adjustment system, fuzzy PID control algorithm, simulation analysis