Results 241 to 250 of about 497,594 (265)
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A Micromechanical Mode-Matched Gyroscope Using Stiffness Nonlinearity and Electrostatic Tuning
2021 IEEE 34th International Conference on Micro Electro Mechanical Systems (MEMS), 2021This work reports design of a dual-mode decoupled single-mass micromechanical gyroscope with a fully symmetrical structure aiming to achieve mode-matching despite of fabrication errors and packaging stress imbalance. Mode-matching is done by combing the spring-hardening effect caused by the nonlinear stiffness of the elastic beam and the linear ...
Xuetong Wang +6 more
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Adaptive-Twist Airfoil Based on Electrostatic Stiffness Variation
22nd AIAA/ASME/AHS Adaptive Structures Conference, 2014Shape-adaptable airfoils with variable shear center location and torsional stiffness represent a promising solution for controlling the aerodynamic loads on a wing by continuous deformations instead of rigid-body attachments. In the present article, a structural concept for an adaptive-twist airfoil based on wing spars with variable mechanical topology
Raither, Wolfram +4 more
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Comprehensive Model of Laminar Jamming Variable Stiffness Driven by Electrostatic Adhesion
IEEE/ASME Transactions on MechatronicsHongliang Ren +2 more
exaly +2 more sources
Electrostatic Layer Jamming Variable Stiffness Enhanced by Giant Electrorheological Fluid
IEEE/ASME Transactions on MechatronicsJiheng Ding, Huayan Pu
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2017 IEEE SENSORS, 2017
An inherent variable stiffness approach was proposed to suppress the rebound and impact of the electrostatic switch due to waveform deviations. A simple clamped-guided beam spring with large deflection, which generated inherent cubic nonlinear restoring force, was adopted for implementation of the approach.
Xiaojian Xiang +4 more
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An inherent variable stiffness approach was proposed to suppress the rebound and impact of the electrostatic switch due to waveform deviations. A simple clamped-guided beam spring with large deflection, which generated inherent cubic nonlinear restoring force, was adopted for implementation of the approach.
Xiaojian Xiang +4 more
openaire +2 more sources
Electrostatically tunable bending stiffness in a GFRP–CFRP composite beam
Smart Materials and Structures, 2007The suppression of vibrations in structures is commonly considered a useful measure for the extension of their lifetime, when high amplitude vibrations are observed. In the experiments presented in this work, the modification of the stiffness of a beam as a means to suppress vibrations due to resonance is proposed as an alternative to the introduction ...
Bergamini, A. +2 more
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Structure Design and Experiment for a Resonant Accelerometer based on Electrostatic Stiffness
Key Engineering Materials, 2011The introduced resonant accelerometer makes use of the equivalent electrostatic stiffness to sense the acceleration. The sensitivity can be adjusted by changing the applied sensing voltage. But the no-linearity problem between the output frequency and applied acceleration is difficult to calculate the sensitivity and analysis its influence directly ...
Heng Liu +3 more
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Thin Solid Films, 2010
Recent theoretical and experimental research showed that the response of micro/nanocantilevers to detect materials is not always simply related to extra mass. Stiffness of adsorbates and surface stress-induced changes in the stiffness, arising from adsorption, can produce frequency shifts that are several times greater in magnitude than those induced ...
Hamed Sadeghian +3 more
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Recent theoretical and experimental research showed that the response of micro/nanocantilevers to detect materials is not always simply related to extra mass. Stiffness of adsorbates and surface stress-induced changes in the stiffness, arising from adsorption, can produce frequency shifts that are several times greater in magnitude than those induced ...
Hamed Sadeghian +3 more
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A Frequency Selective Silicon Vibration Sensor with Direct Electrostatic Stiffness Modulation
Analog Integrated Circuits and Signal Processing, 2003In the field of industrial machinery an increasing demand for low cost vibration measurement equipment exists. The described frequency selective structures represent a low-cost alternative to the commonly used wide band accelerometers. To continuously cover a wide frequency range with a small number of resonators the sensor structures possess a ...
Dirk Scheibner +5 more
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Applied Physics Letters, 2019
Contact bounce, high driving voltage, and poor robustness to process deviations are the main bottlenecks that limit the reliability of MEMS electrostatic switches. In this study, a variable stiffness strategy offers an optimized path to reach the closure position for the movable electrode. In the proposed method, the switching system's stiffness is low
Xiaojian Xiang +5 more
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Contact bounce, high driving voltage, and poor robustness to process deviations are the main bottlenecks that limit the reliability of MEMS electrostatic switches. In this study, a variable stiffness strategy offers an optimized path to reach the closure position for the movable electrode. In the proposed method, the switching system's stiffness is low
Xiaojian Xiang +5 more
openaire +1 more source