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Dynamic modeling and vibration control of a coupled rigid-flexible high-order structural system: A comparative study

机译:耦合刚性柔性高阶结构系统的动态建模与振动控制:比较研究

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A Generalized Differential Quadrature (GDQ) as an accurate numerical technique based on non-uniform grid point distribution, Chebyshev-Gauss-Lobatto (CGL) and Roots of the Legendre Polynomial (RLP) is investigated for active vibration suppression of flexible spacecraft appendages embedded with piezoelectric (PZT) patches. The flexibility of the system is modeled as a sandwich panel with honeycomb core via high-order theories to monitor extra vibrations of the system for high accuracy missions. The coupled governing partial differential equations of the motion and the corresponding boundary conditions were derived through Hamilton's principle. The spacecraft is maneuvered by constant and harmonic torques with different excitation frequency to analyze the vibration sensitivity of the system. The Strain Rate Feedback (SRF) control law is utilized to apply the effects of PZTs action on vibration suppression of flexible appendages. The numerical study of the system characterized by coupled rigid-flexible (highorder) dynamic provides a powerful general tool for analysis of maneuvering spacecraft with smart sandwich appendages and demonstrates the importance of the proposed formulation for the prediction of higher mode vibration response of flexible parts. (C) 2020 Elsevier Masson SAS. All rights reserved.
机译:作为基于非均匀网格点分布的精确数值技术(GDQ),Chebyshev-Gauss-Lobatto(CGL)和Legendre多项式(RLP)的根部的柔性航天器阑尾的主动振动抑制来研究作为基于非均匀网格点分布的准确数值(GDQ)作为基于非均匀网格分布的准确数值技术压电(PZT)斑块。系统的灵活性通过高阶理论为蜂窝核心的夹层面板,以监测系统的额外振动,以获得高精度任务。通过Hamilton的原理推导出运动的耦合控制的运动和相应的边界条件。通过恒定和谐波扭矩操纵宇宙飞船,具有不同的激励频率来分析系统的振动灵敏度。应变速率反馈(SRF)控制法用于应用PZTS作用对柔性阑尾振动抑制的影响。具有耦合刚性(高效)动态的系统的数值研究提供了一种强大的一般工具,用于分析与智能三明治附录的机动航天器的分析,并展示了所提出的制剂对柔性部件的更高模式振动响应预测的重要性。 (c)2020 Elsevier Masson SAS。版权所有。

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