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

IF 1.9 4区 工程技术 Q3 ENGINEERING, MECHANICAL
S. K. Gupta, Ehab E. Basta, O. Barry
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引用次数: 0

Abstract

The application of servo-controlled mechanical-bearing-based precision motion stages (MBMS) is well-established in advanced manufacturing, semiconductor industries, and metrological applications. Nevertheless, the performance of the motion stage is plagued by self-excited friction-induced vibrations. Recently, a passive mechanical friction isolator (FI) has been introduced to reduce the adverse impact of friction in MBMS, and accordingly, the dynamics of MBMS with FI were analyzed in the previous works. However, in the previous works, the nonlinear dynamics components of FI were not considered for the dynamical analysis of MBMS. This work presents a comprehensive, thorough analysis of an MBMS with a nonlinear FI. A servo-controlled MBMS with a nonlinear FI is modeled as a two DOF spring-mass-damper lumped parameter system. The linear stability analysis in the parametric space of reference velocity signal and differential gain reveals that including nonlinearity in FI significantly increases local stability of the system's steady-states. This further allows the implementation of larger differential gains in the servo-controlled motion stage. Furthermore, we perform a nonlinear analysis of the system and observe the existence of sub and supercritical Hopf bifurcation with or without any nonlinearity in the friction isolator. However, the region of Sub and Supercritical Hopf bifurcation on stability curves depends on the nonlinearity in FI. These observations are further verified by a detailed numerical bifurcation which reveals the existence of nonlinear attractors in the system.
带有非线性摩擦隔离器的精密运动平台的稳定性及分岔分析
伺服控制的基于机械轴承的精密运动平台(MBMS)在先进制造业,半导体工业和计量应用中得到了广泛的应用。然而,运动平台的性能受到自激摩擦振动的困扰。近年来,为了减少摩擦对MBMS的不利影响,引入了被动式机械摩擦隔离器(FI),因此,前人的研究工作对具有FI的MBMS的动力学进行了分析。然而,在以往的工作中,并没有考虑FI的非线性动力学分量来进行MBMS的动力学分析。这项工作提出了一个具有非线性FI的MBMS的全面,彻底的分析。将具有非线性FI的伺服控制MBMS建模为二自由度弹簧-质量-阻尼器集总参数系统。参考速度信号和差分增益参数空间的线性稳定性分析表明,在FI中加入非线性显著提高了系统稳态的局部稳定性。这进一步允许在伺服控制的运动阶段实现更大的差分增益。此外,我们对系统进行了非线性分析,并观察到在摩擦隔离器中存在有或没有任何非线性的亚和超临界Hopf分岔。然而,稳定性曲线上的亚、超临界Hopf分岔区域取决于非线性。通过详细的数值分岔进一步验证了这些观测结果,揭示了系统中存在非线性吸引子。
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来源期刊
CiteScore
4.00
自引率
10.00%
发文量
72
审稿时长
6-12 weeks
期刊介绍: The purpose of the Journal of Computational and Nonlinear Dynamics is to provide a medium for rapid dissemination of original research results in theoretical as well as applied computational and nonlinear dynamics. The journal serves as a forum for the exchange of new ideas and applications in computational, rigid and flexible multi-body system dynamics and all aspects (analytical, numerical, and experimental) of dynamics associated with nonlinear systems. The broad scope of the journal encompasses all computational and nonlinear problems occurring in aeronautical, biological, electrical, mechanical, physical, and structural systems.
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