装备半主动悬架的整车虚拟样机协同仿真研究

【作者】 王辉；

【导师】 方宗德；

【作者基本信息】 西北工业大学 ， 车辆工程， 2006， 硕士

【摘要】 随着高速公路的发展,汽车的速度越来越高,人们对汽车整体性能的要求也在不断提高。悬架系统对汽车整车行驶性能(如行驶平顺性、操纵稳定性等)有举足轻重的影响。传统汽车悬架由于不能同时满足平顺性和操纵稳定性的要求,针对主/半主动悬架的研究变得越来越迫切。 本文采用ADAMS/Car和MATLAB/Simulink联合仿真方法,分别对装备被动悬架、天棚阻尼控制半主动悬架和模糊天棚阻尼控制半主动悬架整车的平顺性和操纵稳定性进行了分析。在ADAMS/Car环境中建立了装备可控悬架的整车虚拟样机模型;给出了模糊控制性能评估表,将模糊控制和天棚阻尼控制策略相结合,并利用MATLAB/Simulink建立半主动悬架控制器模型。联合ADAMS/Car中建立的整车虚拟样机模型和MATLAB/Simulink中建立的控制器模型进行了仿真。 仿真结果表明,装备了半主动悬架的整车平顺性和操纵稳定性均比采用被动悬架的性能要好。联合仿真避免了建立整车动力学方程及推导传递函数,为复杂机械系统的控制与仿真提供了新思路。同时,采用虚拟样机协同设计、调试和试验的方法,同传统的设计方法相比有明显的优势,可以大大地提高设计效率,缩短开发周期,降低开发产品的成本,获得优化的系统整体性能。更多还原

【Abstract】 With the development of highway, the speed of vehicle is becoming higher and higher, and people’s requirements for the integrated performance of vehicles has increased .Suspension systems have a close relationship with the ride comfort and handling and stability of vehicles. Traditional suspensions can not satisfy the requirements for ride comfort and handling and stability at the same time. The study on active /semi- active suspension is becoming more and more urgent.Based on the co-simulation method with ADAMS/Car and MATLAB/Simulink, the paper analyses the ride comfort and handling and stability of whole vehicle ,which is respectively equipped with passive suspension, sky-hook controlled semi-active suspension and fuzzy sky-hook controlled semi-active suspension. Virtual prototype models furnished with controlled suspension are established under the environment of ADAMS. In addition, the controller models of semi-active suspension are set up using MATLAB/Simulink software and simulations are done.The results show the ride comfort and handling and stability of semi- active suspension is better than that of traditional suspension. The co-simulation method, where no complex dynamic equation and transfer function is needed, offers a new approach to control and simulation of complicated mechanism. At the same time, comparing with the conventional means of design, it is much useful to assist designing, adjusting and testing via Virtual Prototype Technology. This means can highly enhance the efficiency of design, decrease the developing periods, cut down the cost of developing products and acquire the optimized integrated performance of the system.更多还原