Smooth-switching LPV control for vibration suppression of a flexible airplane wing

• Published in: Aerospace science and technology Vol. 84; pp. 895 - 903
• Main Authors: He, Tianyi, Zhu, Guoming G., Swei, Sean S.-M., Su, Weihua
• Format: Journal Article
• Language: English
• Published: Elsevier Masson SAS 01.01.2019
• ISSN: 1270-9638; 1626-3219
• DOI: 10.1016/j.ast.2018.11.029

In this paper, active vibration suppression of a Blended-Wing-Body flexible airplane wing is studied by utilizing a smooth-switching linear parameter-varying (LPV) dynamic output-feedback control. For the reduced-order LPV models, developed for each divided flight envelop subregion, a family of mixed Input Covariance Constraint and H∞ LPV controllers are designed to robustly suppress the wing bending displacement using hard-constrained control surfaces, while achieving smooth-switching between adjacent controllers. The proposed LPV controllers are developed by minimizing a combination of weighted H2 output performance and smoothness index, subject to a set of Parametric Linear Matrix Inequalities derived from stability and performance conditions. In addition, the weighting coefficient in the cost function is tuned to balance between H2 performance and switching smoothness by iteratively solving convex optimization problems. Simulation results demonstrate that simultaneous smooth-switching and improved performance can be achieved by the proposed LPV control.