Engineering Creativity Award: Piezoelectric Damping of Flexible Structures

工程创意奖：柔性结构的压电阻尼

• 批准号: 8811633
• 负责人: Thomas Alberts
• 金额: $ 6.29万
• 依托单位: Old Dominion University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-09-01 至 1991-02-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8811633&HistoricalAwards=false
• 关键词: Engineering; Creativity; Award; Piezoelectric; Damping

Lightweight flexible manipulators are playing an important role in current and future space activities. An existing example is the Shuttle Remote Manipulator System (RMS) and future plans call for other RMS-like arms to automate space operations, such as assembly. A key problem to be resolved is to dampen the vibrations caused by the necessary long reach and lightweight construction of the RMS system. The objective of this research project is to investigate the potential passive damping characteristics of piezoelectric film coatings when applied to flexible structural members. It is proposed to use a polymer film, PVDF, which has piezoelectric characteristic, to dessipate vibrational energy by means of an electric current. A layer of PVDF film applied to the surface of a vibrating member will generate an electric current due to mechanical deformations. The electric current can be passed through a passive impedance thus dessipating vibrational energy thereby reducing the vibrations. Using PVDF film to passively dampen vibrations is a new idea which has not been investigated. The ultimate goal is to provide an easily implemented modification to the RMS, or similar flexible manipulator that enhances performance without significantly increasing system cost, weight, and complexity of control or computational costs.

轻型柔性机械手在当前和未来的太空活动中发挥着重要作用。 现有的一个例子是航天飞机远程操纵系统（RMS），未来的计划需要其他类似 RMS 的机械臂来实现太空操作（例如装配）的自动化。 需要解决的一个关键问题是抑制 RMS 系统所需的长距离和轻量化结构所引起的振动。 该研究项目的目的是研究压电薄膜涂层应用于柔性结构构件时的潜在被动阻尼特性。 建议使用具有压电特性的聚合物薄膜PVDF，通过电流耗散振动能量。 施加到振动部件表面的一层PVDF薄膜会因机械变形而产生电流。 电流可以通过无源阻抗，从而消耗振动能量，从而减少振动。 使用 PVDF 薄膜被动减震是一个尚未被研究的新想法。 最终目标是为 RMS 或类似的灵活操纵器提供易于实施的修改，以增强性能，而不会显着增加系统成本、重量以及控制或计算成本的复杂性。