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避让工况下的路径跟踪线性自抗扰控制

DOI: 10.11990/jheu.201407031

Keywords: 避让工况, 路径跟踪, 线性自抗扰控制, Carsim联合仿真

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Abstract:

针对高速紧急避让工况,进行车辆路径跟踪鲁棒性研究.利用二自由度车辆模型,以控制车辆实际横摆角速度跟踪规划的理想横摆角速度为目标,设计线性自抗扰路径跟踪控制器.线性自抗扰控制器能够将车辆质量、整车转动惯量和轮胎侧偏刚度变化等模型参数变化观测出来并且补偿掉,保证系统鲁棒性.针对避让路径存在侧向加速度过大或产生阶跃、曲率不连续问题,引入Sigmoid函数对避让路径进行再规划.为了验证控制器的鲁棒性,利用Carsim提供的某款SUV进行实车仿真验证.仿真结果表明:线性自抗扰路径跟踪控制器能够控制车辆跟踪理想避让路径,保证车辆快速、无碰撞地避让前方障碍物.

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