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Motion planning for a reversing general 2-trailer configuration using Closed-Loop RRT

机译:使用闭环RRT进行可逆通用双拖车配置的运动规划

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摘要

Reversing with a dolly steered trailer configura- tion is a hard task for any driver without extensive training. In this work we present a motion planning and control framework that can be used to automatically plan and execute complicated manoeuvres. The unstable dynamics of the reversing general 2- trailer configuration with off-axle hitching is first stabilised by an LQ-controller and then a pure pursuit path tracker is used on a higher level giving a cascaded controller that can track piecewise linear reference paths. This controller together with a kinematic model of the trailer configuration is then used for forward simulations within a Closed-Loop Rapidly Exploring Random Tree framework to generate motion plans that are not only kinematically feasible but also include the limitations of the controller’s tracking performance when reversing. The approach is evaluated over a series of Monte Carlo simulations on three different scenarios and impressive success rates are achieved. Finally the approach is successfully tested on a small scale test platform where the motion plan is calculated and then sent to the platform for execution. 
机译:对于没有经过大量培训的驾驶员来说,采用多莉转向拖车构型进行倒车是一项艰巨的任务。在这项工作中,我们提出了一个运动计划和控制框架,该框架可用于自动计划和执行复杂的动作。带有偏轴悬挂的可逆通用2挂车配置的不稳定动力学首先由LQ控制器稳定,然后在更高级别上使用纯追逐路径跟踪器,从而提供可跟踪分段线性参考路径的级联控制器。然后,该控制器与挂车配置的运动学模型一起用于闭环快速探索随机树框架内的前向仿真,以生成不仅在运动学上可行的运动计划,而且还包括倒车时控制器跟踪性能的限制。通过在三种不同情况下进行的一系列蒙特卡洛模拟评估了该方法,并获得了令人印象深刻的成功率。最终,该方法在小规模测试平台上成功进行了测试,在该平台上计算了运动计划,然后将其发送到平台以执行。

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