用机载传感器实时精准估算风速风向,提升无人机飞行安全与效率。
Design and Implementation of a High-Precision Wind-Estimation UAV with Onboard Sensors
- 基于机载传感器和干扰观测器估计气动力,再用薄板样条模型映射为风矢量。
- 风速误差低至0.06 m/s(风洞)、0.22 m/s(户外悬停),方向误差小于7.3°。
- 可估测垂直风,适用于高速飞行与资源受限平台,适合智能无人机研发者。
高精度实时风矢量估计对提升无人机的安全性、导航精度和能源效率至关重要。传统方法依赖外部传感器或简化飞行器动力学,限制了其在敏捷飞行或资源受限平台上的应用。本文提出一种仅依靠机载传感器的实时风估计方法:首先利用干扰观测器(DOB)估计外部气动力,再通过薄板样条(TPS)模型将其映射为风矢量。自研风筒结构增强了无人机的气动敏感性,进一步提升估计精度。系统在风洞、室内及室外飞行中进行全面验证。实验结果表明,该方法在受控与真实场景下均实现高精度风估计:风洞测试中速度均方根误差(RMSE)低至0.06 m/s,户外悬停时为0.22 m/s,室内外动态飞行下低于0.38 m/s;方向误差始终低于7.3°,优于现有基线。此外,该方法还能提供基线无法获取的垂直风估计,即使在快速室内平移过程中,垂直风误差也低于0.17 m/s。
原文摘要 · Abstract (English)
Accurate real-time wind vector estimation is essential for enhancing the safety, navigation accuracy, and energy efficiency of unmanned aerial vehicles (UAVs). Traditional approaches rely on external sensors or simplify vehicle dynamics, which limits their applicability during agile flight or in resource-constrained platforms. This paper proposes a real-time wind estimation method based solely on onboard sensors. The approach first estimates external aerodynamic forces using a disturbance observer (DOB), and then maps these forces to wind vectors using a thin-plate spline (TPS) model. A custom-designed wind barrel mounted on the UAV enhances aerodynamic sensitivity, further improving estimation accuracy. The system is validated through comprehensive experiments in wind tunnels, indoor and outdoor flights. Experimental results demonstrate that the proposed method achieves consistently high-accuracy wind estimation across controlled and real-world conditions, with speed RMSEs as low as \SI{0.06}{m/s} in wind tunnel tests, \SI{0.22}{m/s} during outdoor hover, and below \SI{0.38}{m/s} in indoor and outdoor dynamic flights, and direction RMSEs under \ang{7.3} across all scenarios, outperforming existing baselines. Moreover, the method provides vertical wind estimates -- unavailable in baselines -- with RMSEs below \SI{0.17}{m/s} even during fast indoor translations.
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