The variable mass pitching systems along with load quality and its pitch angle displacement, and the same as its position of the center of the pitching and driving torque changes etc.To design the adaptive control strategy, we put forward the inter-partition PID control algorithm for the driven motor of the pitching mechanism. To position servo precision and follow-up time as the goal, according to the pitch rate feedback, three interval PID control algorithm is designed. Based on ADAMS and

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... link simulation technology, we established the virtual prototype model of variable quality pitching system. Through simulation and physical prototype test, the classical PID and the inter-partition PID control algorithm are compared and analyzed by the position control accuracy and rapidity. The results show that, within the scope of the regulation response time, the error precision is less than 0.5°, the inter-partition PID control algorithm can effectively improve the control accuracy of the variable mass pitching system.