MEMS-Based Control of Structural Dynamic Instability
MEMS-Based Control of Structural Dynamic Instability
复制标题
基于 MEMS 的结构动态不稳定性控制
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Stephen C. Jacobsen
中科院分区：
文献类型：
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作者：
Andrew A. Berlin;J. Geoffrey Chase;Mark H. Yim;Brian J. Maclean;M. Olivier;Stephen C. Jacobsen
本文描述了一种将分布式MEMS技术应用于屈曲受压构件主动稳定的原型有源柱的设计、分析和表征。通过主动控制屈曲的动力失稳，可以提高结构构件的轴向承载能力。有效的主动稳定取决于三个主要因素：传感器精度、执行器权限和控制系统带宽。将MEMS传感器网络阵列、丝状PZT驱动器和最近开发的最优控制策略相结合，展示了对固有不稳定柱的主动控制。该主动系统采用有限元和优化方法进行设计和仿真，可使实验柱的轴向抗压荷载稳定到临界屈曲荷载的2.9倍。此外，该系统在从拉伸到最大轴向压缩载荷范围内的所有载荷下都是稳定的。
This paper describes the design, analysis and characterization of a prototype active column that applies distributed MEMS technology to the active stabilization of a buckling compressive member. The axial load bearing capacity of structural members can be increased by actively controlling the dynamic instability of buckling. Effective active stabilization is dependent on three primary factors: sensor precision, actuator authority, and control system bandwidth. A networked array of MEMS sensors, filamentary PZT actuators, and recently developed optimal control strategies are combined to demonstrate active control of an inherently unstable column. The active system, designed and simulated using finite element and optimization methods, stabilizes an experimental column for compressive axial loads up to 2.9 times the critical buckling load. Additionally, the system is stable for all loads in the range from tension to this maximum compressive axial load.