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为了实现复杂非线性车辆半主动悬架系统的减振控制,对整个系统的动力学特性和磁流变减振器的特性进行分析,得到期望的阻尼力变化趋势,并由此提出一种直接针对减振器电流的新型模糊控制策略。该策略构建了以车身加速度、减振器两端速度差以及悬架动行程作为输入的三维控制结构,并将其简化为二维结构,同时引入减振器的设计思想制定了非对称的模糊控制规则。通过对整个悬架系统及路面激励进行建模,并对非线性被动悬架系统和该模糊控制策略下的半主动悬架系统进行比较仿真实验,结果表明该模糊控制策略能极大地抑制车身加速度和轮胎动载荷,减小悬架动行程,车辆乘坐舒适性、行驶安全性和操作稳定性均得到了显著改善,系统悬架具有良好的综合性能。
In order to achieve the damping control of semi-active suspension system of complex nonlinear vehicle, the dynamic characteristics of the whole system and the characteristics of MR damper are analyzed to obtain the expected trend of damping force change, and a direct A New Fuzzy Control Strategy for Shock Absorber Current. The strategy constructs a three-dimensional control structure with the body acceleration, the speed difference between the two ends of the shock absorber and the moving stroke of the suspension as an input, and simplifies it into a two-dimensional structure. At the same time, the design idea of the shock absorber is introduced to make the asymmetric fuzzy Control rules. Through the modeling of the whole suspension system and the road surface excitation, the simulation experiments of the nonlinear passive suspension system and the semi-active suspension system under the fuzzy control strategy are carried out. The results show that the fuzzy control strategy can greatly reduce the body acceleration And the tire dynamic load, reducing the suspension moving stroke, vehicle ride comfort, driving safety and operating stability have been significantly improved, the system suspension has a good overall performance.