Robust Gust Alleviation and Stabilization of Very Flexible Aircraft
Robust Gust Alleviation and Stabilization of Very Flexible Aircraft
复制标题
DOI：
10.2514/1.j051697
复制
发表时间：
2013-01
期刊：
影响因子：
2.5
通讯作者：
R. Cook;R. Palacios;P. Goulart
中科院分区：
文献类型：
--
作者：
R. Cook;R. Palacios;P. Goulart
本文研究了采用后缘操纵面的大柔性飞机的鲁棒线性控制和模型降阶方法。控制器的非线性气动弹性方程的线性化设计，和闭环响应的线性化和非线性系统的离散阵风分布进行了比较，开环动态。结果表明，对于一个相对较大的线性化系统，在临界阵风长度下，采用鲁棒∞控制器可使根部弯矩载荷减轻9%。当应用于同一车辆的非线性模型，鲁棒控制器给出了一个很好的性能，在响应短阵风，包括临界长度，甚至更好的负载减少比线性情况。然而，随着阵风长度的增加，这种性能差距减小。它还示出了如何标准的模型简化技术可以提供一个最小尺寸的气动弹性系统的选择的度量。最后，它显示...
Robust linear control, combined with model-reduction methodologies, is investigated for gust rejection on large, very flexible aircraft using trailing-edge control surfaces. Controllers are designed on linearizations of the nonlinear aeroelastic equations, and the closed-loop response of both the linearized and nonlinear system to discrete gust distributions is compared to the open-loop dynamics. Results show that an ℋ∞ controller performs well on a relatively large linearized system, with 9% load alleviation in root bending moments for the critical gust length. When applied to the nonlinear model of the same vehicle, the robust controller gives a good performance in response to short gusts, including the critical length, with even better load reductions than the linear case. However, this performance gap decreases as the gust length is increased. It is also shown how standard model-reduction techniques can provide metrics for the selection of a minimum size of the aeroelastic system. Finally, it is shown...