仅用标准传感器实现无人机吊挂物精准跟踪
Towards Fully Onboard State Estimation and Trajectory Tracking for UAVs with Suspended Payloads
- 仅依赖GNSS和IMU数据,融合动力学模型进行状态估计
- 仿真显示性能仅比真实测量差<6%,对负载参数变化鲁棒
- 适合无额外传感器的低成本无人机系统,实测验证有效
本文针对无人机吊挂负载的位置跟踪问题,提出一种面向实际部署、硬件要求极低的解决方案。与依赖动作捕捉系统、额外机载摄像头或传感负载的现有方法不同,本工作仅使用标准机载传感器——实时动态全球导航卫星系统(RTK-GNSS)和惯性测量单元(IMU)数据,实现负载位置的估计与控制。系统建模了飞行器与负载的完整耦合动力学,集成线性卡尔曼滤波器进行状态估计,结合模型预测轮廓规划器与增量式模型预测控制器。该控制架构在感知受限和估计不确定条件下仍保持有效性。大量仿真表明,所提系统性能接近基于真值测量的控制,性能下降小于6%;且对负载参数变化具有强鲁棒性。野外实验进一步验证了该框架在仅使用现成无人机硬件下的实用性和可靠表现。
原文摘要 · Abstract (English)
This paper addresses the problem of tracking the position of a cable-suspended payload carried by an unmanned aerial vehicle, with a focus on real-world deployment and minimal hardware requirements. In contrast to many existing approaches that rely on motion-capture systems, additional onboard cameras, or instrumented payloads, we propose a framework that uses only standard onboard sensors--specifically, real-time kinematic global navigation satellite system measurements and data from the onboard inertial measurement unit--to estimate and control the payload's position. The system models the full coupled dynamics of the aerial vehicle and payload, and integrates a linear Kalman filter for state estimation, a model predictive contouring control planner, and an incremental model predictive controller. The control architecture is designed to remain effective despite sensing limitations and estimation uncertainty. Extensive simulations demonstrate that the proposed system achieves performance comparable to control based on ground-truth measurements, with only minor degradation (< 6%). The system also shows strong robustness to variations in payload parameters. Field experiments further validate the framework, confirming its practical applicability and reliable performance in outdoor environments using only off-the-shelf aerial vehicle hardware.
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