基于深度学习辅助修正的履带车辆路径跟随控制研究

Research of Deep Learning Network Assisted Path-Following Control

  • 摘要: 为了提升在城市、厂区等铺面路应用场景下的无人履带平台的路径跟随作业精度,减少差速转向中滑移滑转对车辆行驶路径的影响,提出了一种基于深度学习辅助修正的履带车辆路径跟随控制方法. 基于卷积神经网络−径向基函数网络(convolutional neural network- radial basis function,CNN-RBF)建立了车辆滑移滑转率识别预测模型,根据车辆在城市道路行驶过程中对滑移滑转率保持均方根误差(root mean square error,RMSE)小于0.101的识别水平,基于线性时变模型预测控制技术(linear time varying-model predictive control,LTV-MPC)建立了车辆路径跟随控制算法,并采用识别预测得到的滑移滑转率进行辅助修正,以提升城市应用场景下履带车辆路径跟随控制精度. Recurdyn-Simulink联合仿真试验结果表明,与无修正的路径跟随控制比较,采用基于深度学习辅助修正的履带车辆路径跟随控制算法对跟随误差平均优化了45.5%、最大优化67%.

     

    Abstract: To enhance the path-following accuracy of unmanned tracked platforms in urban and factory area applications, and to reduce the impact of skid-steering slip on the vehicle’s path, a deep learning assisted path-following control method for tracked vehicles was proposed. A vehicle slip ratio prediction model was established based on a convolutional neural network-radial basis function (CNN-RBF) network, which keeps root mean square error(RMSE) lower than 0.101 recognition and prediction accuracy for the slip ratio based on rotational speeds of the tracks on both sides of the vehicle during urban road driving. A vehicle path-following control algorithm was developed using linear time varying-model predictive control (LTV-MPC) technology, and the predicted slip ratio was used for auxiliary correction to improve path-following control accuracy of tracked vehicles in urban application scenarios. The Recurdyn-Simulink co-simulation results show that, compared to path-following control without correction assisted, the deep learning assisted path-following control algorithm for tracked vehicles optimizes the following error by an average of 45.5%, with a maximum optimization of 67%.

     

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