arXiv:2508.17038cs.ROcs.SY2025-08被引 12

提出快速迭代路径规划法,实现自动泊车高效避障与平滑控制。

A Rapid Iterative Trajectory Planning Method for Automated Parking through Differential Flatness

  • 基于微分平坦性构建路径,确保符合车辆运动模型。
  • 在换挡点引入终端平滑约束,提升轨迹控制可行性。
  • 仿真与实车验证表明效率高、跟踪误差小,适合实际车辆应用。

随着自动驾驶技术发展,自动泊车日益重要。但路径速度分解(PVD)轨迹规划面临两大挑战:如何兼顾快速与精确避障,以及在换挡点(GSP)保持足够控制可行性。本文提出一种基于PVD的快速迭代轨迹规划(RITP)方法,通过新型避障框架平衡时间效率与避障精度,并结合车辆运动学模型与在GSP处加入终端平滑约束(TSC),提升整体轨迹控制可行性。利用微分平坦性保证路径满足车辆动力学约束,TSC确保换挡点曲率连续。仿真结果表明,该方法在时间效率和跟踪误差上优于模型集成及其他迭代方法;实车实验基于ROS平台验证了RITP方法在真实车辆上的适用性。

原文摘要 · Abstract (English)

As autonomous driving continues to advance, automated parking is becoming increasingly essential. However, significant challenges arise when implementing path velocity decomposition (PVD) trajectory planning for automated parking. The primary challenge is ensuring rapid and precise collision-free trajectory planning, which is often in conflict. The secondary challenge involves maintaining sufficient control feasibility of the planned trajectory, particularly at gear shifting points (GSP). This paper proposes a PVD-based rapid iterative trajectory planning (RITP) method to solve the above challenges. The proposed method effectively balances the necessity for time efficiency and precise collision avoidance through a novel collision avoidance framework. Moreover, it enhances the overall control feasibility of the planned trajectory by incorporating the vehicle kinematics model and including terminal smoothing constraints (TSC) at GSP during path planning. Specifically, the proposed method leverages differential flatness to ensure the planned path adheres to the vehicle kinematic model. Additionally, it utilizes TSC to maintain curvature continuity at GSP, thereby enhancing the control feasibility of the overall trajectory. The simulation results demonstrate superior time efficiency and tracking errors compared to model-integrated and other iteration-based trajectory planning methods. In the real-world experiment, the proposed method was implemented and validated on a ROS-based vehicle, demonstrating the applicability of the RITP method for real vehicles.

自动驾驶路径规划运动控制泊车系统

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