用牛顿-拉夫森法实现轻量级飞行器控制,省电省时还更准。
Lightweight Tracking Control for Computationally Constrained Aerial Systems with the Newton-Raphson Method
- 基于牛顿-拉夫森法设计轻量级追踪控制器,理论性能有保障。
- 实测显示追踪误差更低,计算耗时和能耗大幅下降。
- 适合资源受限的微型飞控系统,如微型飞艇与小型四旋翼。
我们研究了一种基于牛顿-拉夫森法的轻量级追踪控制器在微型飞艇和中型四旋翼上的表现。该方法对特定系统类具有理论性能保证,已在简化运动模型的移动机器人和仿真中成功应用。本文通过真实飞行实验,在受实际部署与机载计算约束的空中平台上评估该方法。对比基线控制框架:飞艇采用反馈线性化,四旋翼与飞艇均采用非线性模型预测控制。评估指标包括:(i) 轨迹与目标轨迹间的均方根误差,(ii) 算法计算时间,(iii) 控制算法对应的CPU能量消耗。实验结果表明,牛顿-拉夫森控制器在追踪性能上达到或优于基线方法,同时显著降低计算时间和能耗。
原文摘要 · Abstract (English)
We investigate the performance of a lightweight tracking controller, based on a flow version of the Newton-Raphson method, applied to a miniature blimp and a mid-size quadrotor. This tracking technique admits theoretical performance guarantees for certain classes of systems and has been successfully applied in simulation studies and on mobile robots with simplified motion models. We evaluate the technique through real-world flight experiments on aerial hardware platforms subject to realistic deployment and onboard computational constraints. The technique's performance is assessed in comparison with established baseline control frameworks of feedback linearization for the blimp, and nonlinear model predictive control for both the quadrotor and the blimp. The performance metrics under consideration are (i) root mean square error of flight trajectories with respect to target trajectories, (ii) algorithms' computation times, and (iii) CPU energy consumption associated with the control algorithms. The experimental findings show that the Newton-Raphson-based tracking controller achieves competitive or superior tracking performance to the baseline methods with substantially reduced computation time and energy expenditure.
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