基于ISD悬架动惯性效应的重型车辆道路友好性与平顺性协调机理及控制研究

Due to the road damage problem of the heavy vehicle, this program aims to carry out the research on the coordinate mechanism between ride comfort and road friendliness of heavy vehicle, semi-active synthesis between mechanical network and electric network and the dynamic coordinate control based on the inertia adjustment in the vertical direction of the dynamic inertia effect of ISD suspension. The dynamic behavior of ISD suspension and its impact on the full car performance are analyzed in order to acquire the influence mechanism of the dynamic inertia effect on ride comfort and road friendliness. Then, a new hydraulic-electric inerter is designed and the dynamic mechanical-electric-hydraulic coupling model of the ISD suspension is built. A new structure design theory is proposed and the structure design can be changed to the optimization of the transfer function and the semi-active synthesis between the mechanical network and electric network. The coupling mechanism between a fixed mechanical network and a variable electric network is explored during the network synthesis. The dynamic control problem of the suspension is inducted to the compromise problem between the input impedance and the system impedance. A control system is designed by considering the performance compromise, stability of system, switching smooth and matching impedance on the basis of the coordinate mechanism between ride comfort and road friendly of the heavy vehicle. At last, the prototype is designed and experiments are carried out in order to improve the high efficient compromise between the dynamic tire load and the acceleration of vehicle body of the heavy vehicle. The research achievements can improve the road friendliness, ride comfort, coordinate the full car performance, and provide a new research idea and method for the suspension of heavy vehicle.

针对重型车辆行驶过程引发的道路损伤难题，拟运用ISD悬架动惯性效应对车辆垂向运动惯性的调节作用，开展重型车辆道路友好性与平顺性协调机理、机电网络半主动综合及协调控制研究。分析ISD悬架动力学行为及对整车性能影响，获得动惯性效应对道路友好性与平顺性作用机理；设计新型液电惯容器，构建ISD悬架机电液系统耦合动态模型，创新提出动态结构设计理论，将其转化为目标传递函数的鲁棒优化及机电网络半主动综合，探讨综合过程中固定机械网络与可变电路网络的耦合作用规律；将悬架控制问题归纳为输入阻抗对系统阻抗的匹配问题，构建重型车辆道路友好性与平顺性协调机制，设计包含性能协调、系统稳定性、切换平稳性及阻抗匹配的协调控制系统；研制原理样机，进行试验验证，实现重型车辆ISD悬架轮胎动载荷与车身加速度高效协调。研究成果可改善重型车辆道路友好性、提高平顺性、协调整车综合性能，为重型车辆悬架理论研究提供一种新的思路与方法。