大型飞机变排量PDU载荷自适应控制技术研究与验证OA

Variable displacement hydraulic motors can achieve adaptive flow control based on load changes,featuring high efficiency,fast response and low power consumption.However,they also face key technical issues such as a large starting dead zone,low-speed oscillation and significant high pressure internal leakage.To improve the control accuracy and robustness of the variable displacement PDU,we propose a control law design method that combines PID control with feedforward anti-interference.By Simulink modeling simulation and test verification,the proposed control law algorithm can significantly improve dynamic speed response characteristics of the PDU.The test results demonstrate that under the hydraulic condition of 35 MPa and the aerodynamic load of 240 N·m,the flow consumed by the variable displacement PDU is 60.1%lower than that of the same fixed displacement PDU,while the driving efficiency is increased by 100.8%and the total power consumption is reduced by 17.34 kW.