Nonlinear Dynamics of Pneumatic Isolators in Ultra-Precision Manufacturing Machines

超精密制造机器中气动隔离器的非线性动力学

• 批准号: 2000984
• 负责人: Oumar Barry
• 金额: $ 32.55万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2000984&HistoricalAwards=false
• 关键词: Nonlinear; Dynamics; Pneumatic; Isolators; Ultra

Ultra-precision manufacturing (UPM) machines enable the production of micro- and nano-devices that are critical for the advances in the electronics, biomedical, communications and other cutting-edge industries. As a critical step in meeting UPM machine’s stringent precision requirement, they must be isolated from unwanted vibrations stemming from fast moving machines and ground motions. For this purpose, pneumatic (passive) isolators are often preferred over active systems because of their relatively low cost and energy efficiency. Recent studies have demonstrated that the performance of pneumatic isolators can be significantly improved using more sophisticated control approaches. However, those past studies did not account for the well-known inherent complex, and nonlinear, behaviors in pneumatic isolators. The aim of this award is to support fundamental research to understand the nonlinear dynamics of passively-isolated UPM machines and determine how the benefits of nonlinear dynamics can be exploited to improve the performance of pneumatic isolators. The knowledge gained will enable U.S. manufacturing industry to build cheaper, better, and faster UPM machines, advancing national prosperity and impacting efforts to secure the national defense. In a broader context, the findings can also be applied to a broader class of nonlinear mechanical and electromechanical systems. The research work will also help broaden the representation and retention of underrepresented minority (URM) in engineering fields.The research project will be the first to conduct a nonlinear vibration analysis of pneumatic isolators to scientifically reveal whether the benefits of mode coupling observed in linear systems can be extended to nonlinear systems. To this end, a nonlinear system identification via a direct reconciliation of experimental measurements and theoretical modeling will be conducted to detect and quantify the nonlinear stiffness and nonlinear damping of pneumatic isolators. A thorough theoretical analysis will then be carried out to understand the interplay between nonlinear mode coupling, stability, and bifurcation in pneumatic isolated UPM machines. Optimal control theory will be used to determine the optimum design parameters, which will then serve as guidelines for improving the design of pneumatic isolators. Rigorous physical experimentation will be performed to guide and validate the theoretical findings. The outcome of the researched work will lead to new insights on how to exploit nonlinear dynamic phenomena for improving the performance of pneumatic isolators. The PI will continue to focus on the participation from underrepresented groups though connections to the National Society of Black Engineers and other STEM-related activities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

超精密制造（UPM）机器可以生产对电子、生物医学、通信和其他尖端行业的进步至关重要的微型和纳米器件。作为满足UPM机器严格精度要求的关键步骤，它们必须与快速移动的机器和地面运动产生的不必要振动隔离。为此，气动（被动）隔离器往往优于主动系统，因为它们的成本和能源效率相对较低。最近的研究表明，气动隔离器的性能可以显着提高使用更复杂的控制方法。然而，这些过去的研究并没有考虑到众所周知的固有的复杂性，非线性，在气动隔离器的行为。该奖项的目的是支持基础研究，以了解被动隔离UPM机器的非线性动力学，并确定如何利用非线性动力学的优势来提高气动隔离器的性能。所获得的知识将使美国制造业能够制造更便宜，更好，更快的UPM机器，促进国家繁荣并影响国防安全。在更广泛的背景下，研究结果也可以应用到更广泛的一类非线性机械和机电系统。该研究项目将首次对气动隔振器进行非线性振动分析，以科学地揭示在线性系统中观察到的模式耦合的好处是否可以扩展到非线性系统。为此，将通过实验测量和理论建模的直接协调进行非线性系统识别，以检测和量化气动隔离器的非线性刚度和非线性阻尼。深入的理论分析，然后将进行了解之间的相互作用的非线性模式耦合，稳定性，和分岔的气动隔离的UPM机器。最优控制理论将被用来确定最优的设计参数，这将作为指导，以改善气动隔离器的设计。将进行严格的物理实验来指导和验证理论研究结果。研究工作的结果将导致新的见解如何利用非线性动力学现象，以提高气动隔离器的性能。PI将继续关注代表性不足的群体的参与，通过与全国黑人工程师协会和其他STEM相关活动的联系。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

On the Nonlinear Mode-Coupling in Ultra Precision Manufacturing Machines: Experimental and Analytical Analyses

超精密制造机器中的非线性模式耦合：实验和分析

• DOI: 10.1115/detc2020-22398
• 发表时间: 2020
• 期刊: Proceedings of the ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
• 作者: Gupta, Sunit K.;Bukhari, Mohammad A.;Barry, Oumar R.;Okwudire, Chinedum E.
• 通讯作者: Okwudire, Chinedum E.

BIFURCATION ANALYSIS OF A PD CONTROLLED MOTION STAGE WITH A NONLINEAR FRICTION ISOLATOR

具有非线性摩擦隔离器的 PD 控制运动平台的分岔分析

• 发表时间: 2023
• 期刊: ASME: IDETC-CIE 2022
• 作者: Ehab E. Basta, Sunit K.

Stability and Bifurcation Analysis of Precision Motion Stage With Nonlinear Friction Isolator

非线性摩擦隔离器精密运动平台的稳定性和分岔分析

• DOI: 10.1115/1.4062266
• 发表时间: 2023
• 期刊: Journal of Computational and Nonlinear Dynamics
• 影响因子: 2
• 作者: Gupta, Sunit K.;Basta, Ehab E.;Barry, Oumar R.
• 通讯作者: Barry, Oumar R.

Nonlinear mode coupling in a passively isolated mechanical system

被动隔离机械系统中的非线性模式耦合

• DOI: 10.1007/s11071-020-05908-9
• 发表时间: 2020
• 期刊: Nonlinear Dynamics
• 影响因子: 5.6
• 作者: Gupta, Sunit K.;Bukhari, Mohammad A.;Barry, Oumar R.
• 通讯作者: Barry, Oumar R.