南京理工大学机械工程学院,南京,210094
网络首发:2020-07-10,
纸质出版:2020
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顾爱博, 陈刚. 驾驶机器人车辆多新息动态转向力矩补偿[J]. 西安交通大学学报, 2020,54(7):43-51.
Multi-Innovation Based Dynamic Steering Torque Compensation for Driving Robot Vehicle[J]. 2020, 54(7): 43-51.
顾爱博, 陈刚. 驾驶机器人车辆多新息动态转向力矩补偿[J]. 西安交通大学学报, 2020,54(7):43-51. DOI: 10.7652/xjtuxb202007006.
Multi-Innovation Based Dynamic Steering Torque Compensation for Driving Robot Vehicle[J]. 2020, 54(7): 43-51. DOI: 10.7652/xjtuxb202007006.
为了减小驾驶机器人车辆长期自动驾驶过程中转向性能下降带来的影响
提出了一种基于多新息的驾驶机器人车辆动态转向力矩补偿方法。构建了车辆动力学模型和驾驶机器人车辆动力学模型; 建立了以路径曲率及车速为输入、方向盘转向角为输出的驾驶机器人车辆转向性能离线自学习模型; 建立了以方向盘角速度、角加速度及车轮转角为输入
转向机械手驱动力矩为输出的受控自回归在线辨识模型
并运用遗忘因子多新息最小二乘方法进行参数辨识
将迭代计算过程中的标量新息扩展为向量新息
提高了驾驶机器人车辆转向性能参数的辨识精度; 驾驶机器人车辆自动驾驶过程中
利用离线自学习模型和转向机械手动力学方程计算出转向电机输出力矩
加上反馈回来的驱动力矩误差
实现对驾驶机器人车辆转向力矩的在线动态补偿。仿真与试验结果对比表明:所提方法辨识的转向力矩误差在0.1 N·m以内
跟踪目标路径的横向位移偏差小于0.2 m; 所提方法有效减小了驾驶机器人车辆转向性能下降造成的影响。
To weaken the impact of steering performance degradation during long-term automatic driving
a dynamic steering torque compensation method for driving robot vehicle based on multi-innovation is proposed. The vehicle dynamic model and driving robot vehicle dynamic model are constructed
then an off-line self-learning model for the steering performance of driving robot vehicle is established
which takes the path curvature and the vehicle speed as input and the steering wheel angle as output. And a controlled autoregressive on-line identification model is established
which takes the angular velocity of steering wheel
angular acceleration and wheel angle as input and the driving torque of steering manipulator as output
and the parameters are identified with the forgetting factor multi-innovation least square method
the scalar innovation is extended to vector innovation in the iterative calculation to improve the identification accuracy of steering performance parameters of driving rob
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