This paper presents several different control structures that facilitate flight control and does a comparison between them. Specifically, this paper considers command-filtered backstepping, nonlinear dynamic inversion (NDI), and a new decoupled approach that decouples the rotational and translational dynamics by estimating the higher order derivatives of the angle of attack and sideslip angle. The latter is also augmented by exploiting a feedback of the control deficiency resulting in improved performance. A series of simulations is performed to gage the performance of different controllers, showing the performance in the case of sensor noise, when performing aggressive maneuvers, when exposed to wind disturbances, as well as when there are model imperfections. The main finding is that all control structures work well for flight control, but the new decoupled method is able to improve the performance. A major reason for the improvement is that the decoupling method alleviates the tuning of the control gains, thus allowing for faster response through suitable gains.

中文翻译：

---

具有新成果的飞行控制不同控制结构的比较研究

本文提出了几种有助于飞行控制的不同控制结构，并对它们进行了比较。具体来说，本文考虑了命令过滤的反步法，非线性动态反演（NDI）和一种新的解耦方法，该方法通过估计迎角和侧滑角的高阶导数来解耦旋转和平移动力学。通过利用控制缺陷的反馈来增强后者，从而改善性能。进行了一系列模拟，以衡量不同控制器的性能，显示了在传感器噪声情况下，执行激进操作，暴露于风扰以及模型不完善时的性能。主要发现是所有控制结构都可以很好地用于飞行控制，但是新的解耦方法可以提高性能。改进的主要原因是，去耦方法减轻了控制增益的调整，从而允许通过合适的增益实现​​更快的响应。