Vibration isolation performance of an ultra-low frequency folded pendulum resonator
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Vibration isolation by relative resonance perceived in combination of rigid bodies and elastic beams
2024, Journal of Sound and VibrationInvestigation on the free vibration characteristics of vertical quasi-zero stiffness isolation system considering the disc spring's loading position
2024, Soil Dynamics and Earthquake EngineeringDynamic and experimental analyses of QZS system with beneficial quadratic stiffness
2023, Communications in Nonlinear Science and Numerical SimulationA three-axis modular horizontal vibration isolation system with adjustable stiffness: Design, analysis and experimental validation
2022, Journal of Sound and VibrationCitation Excerpt :In that case, small changes in the payloads close to the buckling limit can significantly alter the response of the isolator [30]. Low frequency horizontal vibration isolators or horizontal QZS isolators can be realized with different means based on crossed-wire suspensions [1], Roberts linkages [11], folded pendulums [2,9] and inverted pendulums/elastic instability [10,30-32]. The current study focuses on designs which are on the verge of elastic instability.
Analysis and design of an adjustable stiffness three-axis horizontal vibration isolator using elastic columns and a string in tension
2022, Journal of Sound and VibrationCitation Excerpt :In the literature, there are various low-frequency vibration isolator designs [1–7]. These systems can be used to isolate instruments such as gravitational wave detectors, seismographs, laser Doppler vibrometers and atomic force microscopes from low frequency excitations [1–3]. They can also be used as pre-isolator systems for further stages of isolation processes [4–5].
Multi-layer electromagnetic spring with tunable negative stiffness for semi-active vibration isolation
2019, Mechanical Systems and Signal ProcessingCitation Excerpt :An HSLDS isolator can be designed by paralleling the negative stiffness with the positive stiffness element. Many negative stiffness mechanisms have been studied in recent years, such as oblique springs [19–23], Euler buckled beams [24,25], cam-roller-spring mechanisms [26,27], inverted pendulums [28,29] and magnetic springs [30–33]. These mechanisms have been applied to passive nonlinear vibration isolators, with good performance for low-frequency vibration isolation.