Semiactive Control of Vibrating Systems Using Electrorheological Fluids

使用电流变流体的振动系统的半主动控制

• 批准号: 9115056
• 负责人: George Leitmann
• 金额: $ 2万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115056&HistoricalAwards=false
• 关键词: Semiactive; Control; Vibrating; Systems; Using

This project is supported under NSF's "Small Grants for Exploratory Research (SGER)" Program and jointly by the Structural Systems and Construction Processes and Earthquake Hazard Mitigation Program. The objective of this project is to explore the feasibility and applicability of electrorheological fluids (ER) as a semiactive scheme for vibration control of structures. The approach is to use a simple system whose control parameters, damping and stiffness coefficients, dependent on the ER fluid, are varied in real time through control of the electric field. a multidisciplinary approach is undertaken in which both experimental and analytical tasks will conducted. The analytical model takes into account the nonlinear dynamics of this problem. A nonlinear control scheme will be developed, based on the constructive use of Lyapunov stability theory. Such a controller is efficient in computation time (essential for real time applications) and, in addition, handles nonlinear dynamics. ER materials characterization and response will be measured using the experimental arrangement. One important result of the research, in addition to demonstration the advantages of semiactive control for structural vibration, is that it will provide guidelines for the requirements of suitable ER fluids for such applications. This investigation explores, for the first time, the feasibility of ER scheme for use in controlling the dynamic structural response and assesses its potentials in solving seismic, wind, or machine-induced vibration problems.

该项目由NSF的“探索性研究小赠款”资助。 研究（SGER）”计划，并由结构系统和 施工过程和地震减灾计划。 本项目的目的是探索可行性， 电流变液（ER）作为半活性 结构振动控制方案。 方法是使用 一个简单的系统，其控制参数，阻尼和刚度 取决于ER流体的系数在真实的时间内变化 通过电场的控制。 一个多学科 采取的方法，其中实验和分析 任务将执行。 分析模型考虑了 这个问题的非线性动力学 一种非线性控制方案 将开发，基于建设性地使用李雅普诺夫 稳定性理论 这样的控制器在计算上是有效的 时间（对于真实的时间应用是必要的），此外， 处理非线性动力学。 ER材料表征和 将使用实验装置测量响应。 一 研究的重要成果，除了示范， 结构振动半主动控制的优点在于， 它将为合适的ER的要求提供指导方针 流体用于此类应用。 这项调查探讨，为 第一次，ER方案用于控制的可行性， 动态结构响应，并评估其在解决 地震、风或机器引起的振动问题。