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Stochastic excitation and delayed oscillation of a micro-oscillator

机译:微振荡器的随机激励和延迟振荡

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Stochastic processes in the form of the classical Brownian motion or internal phonon fluctuations may be studied by the use of a microcantilever. We present certain dynamic aspects of the behavior of the noise and the delayed fluctuations exhibited by a microcantilever. In particular, we present an analytic solution describing the transient response of the oscillator and discuss how self-excitation may determine the presence of small delays and, conversely, how delay-induced excitation may provide sensory information. As an application of the analysis, we present dynamic measurement of surface displacement with a preliminary sensitivity of 2 Hz/μm in the chosen frequency window, which may effectively be extended to the nanometer regime.
机译:可以通过使用微悬臂梁研究经典布朗运动或内部声子波动形式的随机过程。我们介绍了噪声和微悬臂梁所展现的延迟波动的行为的某些动态方面。特别是,我们提供了一种描述振荡器的瞬态响应的解析解决方案,并讨论了自激如何确定小延迟的存在,反之,延迟引起的激励如何提供感官信息。作为分析的应用,我们提出了在选定的频率窗口中以2 Hz /μm的初步灵敏度对表面位移进行动态测量的方法,该方法可以有效地扩展到纳米范围。

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