Results 11 to 20 of about 336,341 (295)
Quasi-Static Pull-in: an Instability in Electrostatic Actuators [PDF]
Scientific Reports, 2020 AbstractWe identify a new instability in electrostatic actuators dubbed quasi-static pull-in. We report experimental evidence of the instability and study its characteristics in two types of micro actuators operating in ambient air. We found that the underlying mechanism is a fast-slow dynamic interaction between slowly-varying electrostatic excitation
Al-Ghamdi, M. S. +3 more
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Electrostatic pull-in instability for tweezer architectures [PDF]
Meccanica, 2022 The authors investigate the static pull-in instability of electrostatically actuated tweezers with tubular electrodes. It is well known that an accurate analytical prediction of pull-in parameters is fundamental for the correct determination of the operation voltage and power dissipation in the system, in addition to the limitations on power ...
G. Bianchi +3 more
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Jump and Pull-in Instability of a MEMS Gyroscope Vibrating System
Micromachines, 2023 Jump and pull-in instability are common nonlinear dynamic behaviors leading to the loss of the performance reliability and structural safety of electrostatic micro gyroscopes.
Yijun Zhu, Huilin Shang
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PULL-DOWN INSTABILITY OF THE QUADRATIC NONLINEAR OSCILLATORS [PDF]
Facta Universitatis, Series: Mechanical Engineering, 2023 A nonlinear vibration system, over a span of convincing periodic motion, might break out abruptly a catastrophic instability, but the lack of a theoretical tool has obscured the prediction of the outbreak. This paper deploys the amplitude-frequency formulation for nonlinear oscillators to reveal the critically important mechanism of the pseudo-periodic
Ji-Huan He +3 more
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Nanoelectromechanical relay without pull-in instability for high-temperature non-volatile memory [PDF]
Nature Communications, 2020 Designing reliable, scalable and energy efficient data storage systems that can operate in extreme temperatures, remains a challenge. Here, the authors demonstrate a nanoelectromechanical relay that does not exhibit pull-in instability for reliable ...
Sunil Rana +6 more
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Alexandria Engineering Journal, 2020 A significant phenomenon associated with devices used in nano/microelectromechanical systems (N/MEMS) is the dynamic pull-in instability. The basic theme of this manuscript is to study the nonlinear oscillation and dynamic pull-in instability in an N ...
Naveed Anjum, Ji-Huan He
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Pull-in Instability of Micro-switch Actuators: Model Review [PDF]
International Journal of Nonlinear Sciences and Numerical Simulation, 2008 The existing three widely used pull-in theoretical models (i.e., one-dimensional lumped model, linear supposition model and planar model) are compared with the nonlinear beam mode in this paper by considering both cantilever and fixed-fixed type mi cro and nano-switches.
W.-H. Lin, Y.-P. Zhao
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Early Postural Instability in Parkinson’s Disease: A Biomechanical Analysis of the Pull Test [PDF]
Parkinson's Disease, 2019 Postural instability in Parkinson’s disease (PD) is commonly assessed by the pull test. This clinical test may be biased by the variability of the pull force applied.
Javier Ricardo Pérez-Sánchez +1 more
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Numerical Investigation of Pull-In Instability in a Micro-Switch MEMS Device through the Pseudo-Spectral Method [PDF]
Modelling and Simulation in Engineering, 2016 A pseudo-spectral approximation is presented to solve the problem of pull-in instability in a cantilever micro-switch. As well known, pull-in instability arises when the acting force reaches a critical threshold beyond which equilibrium is no longer ...
P. Di Maida, G. Bianchi
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Rontgen's electrode-free elastomer actuators without electromechanical pull-in instability. [PDF]
Proc Natl Acad Sci U S A, 2010 Electrical actuators made from films of dielectric elastomers coated on both sides with stretchable electrodes may potentially be applied in microrobotics, tactile and haptic interfaces, as well as in adaptive optical elements. Such actuators with compliant electrodes are sensitive to the pull-in electromechanical instability, limiting operational ...
Keplinger C +3 more
europepmc +4 more sources