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Active buckling control of a beam-column with circular cross-section using piezo-elastic supports and integral LQR control

机译:具有压电弹性支撑和积分LQR控制的圆形截面梁柱的主动屈曲控制

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Buckling of slender beam-columns subject to axial compressive loads represents a critical design constraint for light-weight structures. Active buckling control provides a possibility to stabilize slender beam-columns by active lateral forces or bending moments. In this paper, the potential of active buckling control of an axially loaded beam-column with circular solid cross-section by piezo-elastic supports is investigated experimentally. In the piezo-elastic supports, lateral forces of piezoelectric stack actuators are transformed into bending moments acting in arbitrary directions at the beam-column ends. A mathematical model of the axially loaded beam-column is derived to design an integral linear quadratic regulator (LQR) that stabilizes the system. The effectiveness of the stabilization concept is investigated in an experimental test setup and compared with the uncontrolled system. With the proposed active buckling control it is possible to stabilize the beam-column in arbitrary lateral direction for axial loads up to the theoretical critical buckling load of the system.
机译:受轴向压缩载荷作用的细长梁柱的屈曲代表了轻型结构的关键设计约束。主动屈曲控制可通过主动横向力或弯矩来稳定细长的梁柱。通过实验研究了压电弹性支撑对圆形截面为圆形的轴向受力梁柱进行主动屈曲控制的潜力。在压电弹性支座中,压电叠层致动器的横向力转换成在梁柱端部沿任意方向作用的弯矩。推导了轴向受力梁柱的数学模型,以设计使系统稳定的积分线性二次调节器(LQR)。在实验测试装置中研究了稳定概念的有效性,并与不受控制的系统进行了比较。利用所提出的主动屈曲控制,可以使轴向方向上的梁柱稳定在任意横向方向上,直到系统的理论临界屈曲载荷为止。

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