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论文类型：期刊论文

发表时间：2018-03-03

发表刊物：JOURNAL OF SOUND AND VIBRATION

收录刊物：SCIE、EI

卷号：416

页面范围：17-28

ISSN号：0022-460X

关键字：Flexible wings; Shape morphing; Piezocomposite actuators; Aeroelasticity; Tracking control; Linear quadratic Gaussian (LQG) controller

摘要：Aerodynamic properties of flexible wings can be improved via shape morphing using piezocomposite materials. Dynamic shape control of flexible wings is investigated in this study by considering the interactions between structural dynamics, unsteady aerodynamics and piezo-actuations. A novel antisymmetric angle-ply bimorph configuration of piezocomposite actuators is presented to realize coupled bending-torsional shape control. The active aeroelastic model is derived using finite element method and Theodorsen unsteady aerodynamic loads. A time-varying linear quadratic Gaussian (LQG) tracking control system is designed to enhance aerodynamic lift with pre-defined trajectories. Proof-of-concept simulations of static and dynamic shape control are presented for a scaled high-aspect-ratio wing model. Vibrations of the wing and fluctuations in aerodynamic forces are caused by using the static voltages directly in dynamic shape control. The lift response has tracked the trajectories well with favorable dynamic morphing performance via feedback tracking control. (C) 2017 Elsevier Ltd. All rights reserved.