US-Egypt Cooperative Research: On-Line Tonal Tuning of a Variable Inertia Vibration Absorber

美国-埃及合作研究：可变惯性减振器的在线音调调节

• 批准号: 0108951
• 负责人: Behrooz Fallahi
• 金额: $ 2.5万
• 依托单位: Northern Illinois University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-10-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0108951&HistoricalAwards=false
• 关键词: US; Egypt; Cooperative; Research; Line

0108951FallahiDescription: This award is to support a collaborative project by Dr. Behrooz Fallahi and Dr. Mohamed Seif, both in the Department of Mechanical Engineering, Northern Illinois University, Dekalb, Illinois, and Dr. Said Megahed, Mechanical Design and Production Department, Cairo University, Cairo, Egypt. They plan to study the dynamics and control of a new class of adaptive Tuned Vibration Absorber (TVA: variable effective inertia absorber). The approach has two facets: spectral analysis of the excitation and online tuning of the absorber. The spectral analysis reveals the frequency content of the excitation. The online tuning uses the frequency content of the excitation to reposition a moving mass for tonal vibration suppression. The analytical work, involving linearization of equations and study of its effect, will be supplemented by experimental study to assess the effectiveness of the proposed tonal tuning method. The novelty of the method is that the absorber tuning is done online for tonal vibration suppression, that moving a secondary mass changes absorber resonant frequency, and that the dynamic equation is derived with time dependent control parameter.Scope: The proposed technique may be widely implemented in industrial cases such as civic structures, airplane wings, submarine hulls, and helicopter cabins. The stability of the vibration suppression device is always guaranteed. The US and Egyptian collaborator have strong records of research and experience in mechanical dynamic systems, vibrations and control, and application to robotics and automating systems. The two sides complement each other, as Dr. Megahed is particularly experienced in modeling and simulation, while the US team is particularly strong in the planning and execution of the experiments and in the analysis of the data. The proposal meets the INT objective of supporting collaborative research in areas of mutual interest. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.

0108951 Fallahi描述：该奖项是为了支持Behrooz Fallahi博士和Mohamed Seif博士的合作项目，他们都在伊利诺伊州Dekalb的北方伊利诺伊大学机械工程系，以及埃及开罗大学机械设计和生产系的Said Megahed博士。 他们计划研究一类新的自适应调谐振动吸收器（TVA：可变有效惯性吸收器）的动力学和控制。 该方法有两个方面：光谱分析的激发和在线调谐的吸收。 频谱分析揭示了激励的频率内容。 在线调谐使用激励的频率内容来重新定位用于音调振动抑制的移动质量。 分析工作，包括线性化方程和研究其效果，将补充实验研究，以评估拟议的音调调整方法的有效性。 该方法的新奇在于，在线调谐的音调振动抑制，移动二次质量改变吸收器的谐振频率，并得出与时间相关的控制parameter.Scope的动态方程：所提出的技术可以广泛地实施在工业情况下，如公民结构，飞机机翼，潜艇船体，和直升机机舱。 振动抑制装置的稳定性始终得到保证。 美国和埃及的合作者在机械动态系统，振动和控制以及机器人和自动化系统的应用方面有着丰富的研究和经验。 双方相辅相成，Megahed博士在建模和仿真方面特别有经验，而美国团队在实验的规划和执行以及数据分析方面特别强大。 该提案符合INT的目标，即支持在共同感兴趣的领域进行合作研究。 该项目得到了美国-埃及联合基金方案的支持，该方案向两国的科学家和工程师提供赠款，以开展这些合作活动。