四驱汽车电控分动器性能预测与试验

摘要

In order to study the transmission characteristics of electric control transfer in 4WD vehicle,through reading the relevant literature at home and abroad,and obtain the form of actuator,the current research progress of electric control transfer in enterprises and academia,the chain splitter with electronically controlled clutch structure was taken as research object,and a performance prediction method was proposed based on genetic PID control.Firstly,the test bench of electronic actuator was built,including the engine,clutch,transmission,transfer,universal joint,load motor,and other components.The transmission characteristic prediction model of electric control transfer device was constructed by analyzing the power loss of the components of transfer,such as Sprockets,bearings,friction plates and other components.Secondly,the influence of parameters such as clutch friction number,friction plate inner diameter and lubricating oil viscosity on its performance transfer was discussed.The performance test was carried out on the electronically controlled transfer test stand.By completing the test of the engine at different speeds and different torques,the correctness of the test bed was verified.Finally,on the basis of the model of electric control transfer,combined with the seven-degree-of-freedom vehicle model,the PID parameters of the splitter controller were optimized by genetic algorithm,and the driving characteristic prediction model of the electric control transfer in 4WD vehicle during the running process was constructed and simulated under the specific working conditions.The results showed that the model can predict transmission characteristics of transfer during the running process,the friction plate was a key component of the electric control transfer,and the PID control based on the genetic method can suppress the slipping of the wheel,reduce the overall power loss of the car and improve the fuel economy of the automobile.The result can provide theoretical basis for the design of post-control system.%为了探讨四驱汽车电控分动器的传动性能,以带多片式离合器式的电控分动器为研究对象,提出一种基于遗传PID控制的电控分动器性能预测方法.首先通过分析分动器各部件功耗损失,构建电控分动器传动特性预测模型;其次探讨离合器摩擦副数、摩擦片内外径、润滑油粘度等参数对其性能传递的影响规律;最后在电控分动器试验台上开展了分动器性能试验.试验结果表明,所提性能预测方法能较好地预测行驶过程中电控分动器传动特性,为后期控制系统设计提供理论依据.