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基于动态单纯形算法的车辆状态最优观测器

, PP. 112-119

Keywords: 汽车工程,最优观测器,动态单纯形算法,电子稳定性控制系统,质心侧偏角

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Abstract:

?为了精确、实时监控质心侧偏角、路面附着系数等关键车辆状态参数,保证车辆电子稳定性控制系统(ESC)的控制精度和效果,引入具有显式表达式、方便进行在线计算的非线性Dugoff轮胎模型,描述轮胎与地面之间的非线性附着特性;并对Dugoff轮胎模型进行了改进以提高轮胎模型在大滑移率条件下的计算精度。在二自由度车辆模型和非线性轮胎模型基础上,提出了采用组合动态单纯形算法的车辆状态最优观测器,并将设计的车辆最优状态观测器在基于veDYNA动力学仿真软件的驾驶人在环仿真平台上进行了典型工况的在线测试。结果表明:研究的基于组合动态单纯形算法的车辆状态最优观测器具有较好的观测精度和较快的收敛速度。

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