侧向风干扰下的汽车主动前轮转向最优控制  

Optimal Control of Active Front Wheel Steering for Vehicles Under Perturbation of Crosswind

作　　者：丁能根[1] 康乐[1] 王健[1] 余贵珍[1] 

机构地区：[1]北京航空航天大学交通科学与工程学院,北京100191

出　　处：《北京工业大学学报》2013年第2期161-165,173,共6页Journal of Beijing University of Technology

基　　金：国家863计划资助项目(2009AA11Z216);国家自然科学基金资助项目(50908008)

摘　　要：侧向风对汽车行驶操纵稳定性有重要影响.通过分析侧向风干扰下车辆稳定性,提出基于主动前轮转向(active front wheel steering,AFS)的控制策略.AFS控制器采用线性二次型最优控制算法,以实现横摆角速度和质心侧偏角目标值跟踪.为了评价控制算法,基于MATLAB/Simulink和CarSim协同仿真环境建立整车动力学模型、单点预瞄驾驶员模型、控制器模型、道路和侧向风模型.仿真结果表明,AFS可有效提高车辆在侧向风干扰下的操纵稳定性,且控制算法对车速和路面附着系数具有良好的鲁棒性.Crosswind has substantial influence on the handling and stability of vehicles. Based on the analysis of vehicle stability under perturbation of crosswind, a control strategy for active front wheel steering （AFS） is proposed. The controller was designed using linear quadratic optimal control algorithm with the aim of tracking the target values of yaw rate and side slip angle. Based on the co-simulation platform of MATLAB/Simulink and CarSim, vehicle dynamics model, single-point preview driver model, controller model, and road and crosswind models were built to evaluate the control algorithm. Simulation results show that AFS can effectively improve vehicle handling and stability under crosswind, and has good robustness against variation of vehicle speed and tire/road friction coefficient.

关 键 词：侧向风 主动前轮转向 线性二次型最优控制器 

分 类 号：U461.6[机械工程—车辆工程]