Vehicle Dynamics Modeling and Simulation for ACC

A 7 degree-of-freedom (DOF) 4 wheels vehicle dynamics model based on Matlab-Simulink is established,and 7 DOF vehicle dynamics equations in the form of nonlinear state-space standards are given.The characters of the electronic throttle and the active braking system have been analyzed.And the electronic throttle model and the active braking system model are built according to the test results respectively.Off-line simulation results indicate that the model is suitable for the vehicle adaptive cruise control ...     

基于SD卡的驾驶行为再现存储系统设计

本文以ABS采集系统为基础,利用嵌入式技术设计了以SD卡为存储介质的驾驶行为再现存储系统,对ABS的数据进行读写操作.本系统采用了目前通用的通信方式及SD卡对数据进行存储,设计了基于嵌入式的硬件平台,而在软件设计方面采用了实时操作系统,为上层运用软件开发提供很好的软件运行环境,同时简化了底层软件的开发.最后,系统在实验中表现出功能适用、性能稳定的特点,达到了驾驶行为再现数据存储的目的.     

基于15自由度动力学模型的ABS仿真实验研究

车辆仿真模型的精度是防抱死系统仿真研究的关键环节,控制逻辑是防抱死系统关键技术之一.详细描述了15自由度车辆动力学模型,与实车试验对比完成了模型验证工作.介绍了专业车辆动力学仿真软件veDYNA,并基于仿真环境开发了基于四相位控制逻辑的ABS控制软件,进行了干沥青路面的仿真实验研究.实验结果证明:15自由度动力学模型可以很好的用于ABS技术研究,ABS四相位控制逻辑能较好地发挥系统的性能.四相位控制逻辑也能用于ESP技术的研究.     

Research on Directly Adaptive Fuzzy Algorithm Based ACC Controller

A directly adaptive fuzzy algorithm is applied in vehicle adaptive cruise control system. The basic principle of the adaptive fuzzy algorithm is analyzed. The initial value of the fuzzy based vector is given by the traditional fuzzy membership. Adaptive law of the adjustable parameters θ is also determined. The directly adaptive fuzzy ACC controller is designed based on Matlab fuzzy toolbox. Matlab-Simulink is adopted to test the function of the adaptive fuzzy ACC controller. The control system is established using a 7 DOF vehicle dynamics model. Simulation results indicate that the principle of the method is correct and it performs well both in cruise and distance keeping.