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arXiv 2103.13429eess.SYcs.SY
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多旋翼无人机鲁棒轨迹估计与跟踪的高增益观测器方法

A High-Gain Observer Approach to Robust Trajectory Estimation and Tracking for a Multi-rotor UAV

Connor J Boss, Vaibhav Srivastava

AI总结:

针对多旋翼无人机在未知参考轨迹及外部扰动下的跟踪问题,采用扩展高增益观测器(EHGO)估计未测状态与扰动,并结合反馈线性化控制器设计鲁棒输出反馈控制方法,实现了对移动地面车辆的跟踪与运动中降落。

摘要:

以多旋翼无人机(UAV)的轨迹估计与跟踪为背景,我们探讨了将高增益观测器应用于高动态系统所面临的挑战。多旋翼将在存在外部扰动和建模误差的情况下运行。同时,参考轨迹是未知的,并由具有未知或部分已知动力学的参考系统生成。我们假设仅有的可用测量是多旋翼的位置和姿态以及参考系统的位置。我们采用扩展高增益观测器(EHGO)估计框架来估计未测量的多旋翼状态、建模误差、外部扰动和参考轨迹。我们设计了一种用于轨迹跟踪的鲁棒输出反馈控制器,该控制器由反馈线性化控制器和EHGO组成。对所提出的控制方法进行了严格分析以确立其稳定性。最后,我们通过数值仿真和实验验证阐明了理论结果,其中多旋翼跟踪具有未知轨迹和动力学的移动地面车辆,并成功在运动中降落到该车辆上。

英文摘要:

Using the context of trajectory estimation and tracking for multi-rotor unmanned aerial vehicles (UAVs), we explore the challenges in applying high-gain observers to highly dynamic systems. The multi-rotor will operate in the presence of external disturbances and modeling errors. At the same time, the reference trajectory is unknown and generated from a reference system with unknown or partially known dynamics. We assume the only measurements that are available are the position and orientation of the multi-rotor and the position of the reference system. We adopt an extended high-gain observer (EHGO) estimation framework to estimate the unmeasured multi-rotor states, modeling errors, external disturbances, and the reference trajectory. We design a robust output feedback controller for trajectory tracking that comprises a feedback linearizing controller and the EHGO. The proposed control method is rigorously analyzed to establish its stability properties. Finally, we illustrate our theoretical results through numerical simulation and experimental validation in which a multi-rotor tracks a moving ground vehicle with an unknown trajectory and dynamics and successfully lands on the vehicle while in motion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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