乘用车操稳转向性能指标分解技术应用研究

车辆动力学性能开发包括性能目标设定、目标分解、优化设计、底盘调校,逐渐向目标达成逼近,开发结束后实现目标达成。性能目标分解即指标分解,用简单有物理意义的理论公式关联整车指标与总成指标,将整车的客观性能指标分解至系统特性,是整车性能目标达成的关键环节,在性能开发中承上启下,是各主机厂的核心技术。性能指标分解正常在车辆开发初期,用于指标分解的模型应采用尽可能少的建模参数,建模分析迅速且模型能明确表达系统参数对整车性能的影响规律。ADAMS或CarSim模型,由于模型结构过于复杂,不适用于车辆性能的指标分解。本文建立了用于性能指标分解的模型,并基于此模型研究底盘动力学操稳转向性能指标的分解及应用方法,为车辆动力学性能开发工作提供理论指导。

Development of Handling and Steering Performance Target Cascading For Passenger Car

Vehicle dynamic development includes targets setting,target cascading,optimization design,chassis tuning,gradually approaching the goal,and achieving the goal after development.Target cascading is the key link to achieve the performance target of the whole vehicle,which decomposes objective performance indexes of the whole vehicle into system characteristics.It is the core technology of the OEM.Performance index cascading is normal in the early stage of vehicle development.The model used for index cascading should adopt as few modeling parameters as possible.Modeling analysis is fast and the model can clearly express the influence of system parameters on vehicle performance.ADAMS or Carsim models are not suitable for vehicle performance index cascading because of their complex structure.This paper establishes a model for performance index cascading,and studies the decomposition and application method of vehicle dynamic handling and steering performance index based on this model,which provides theoretical guidance for vehicle dynamic performance development.