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A New Hybrid Gyroscope with Electrostatic Negative Stiffness Tuning [PDF]

open access: yesSensors, 2013
A variety of gyroscopes have been extensively studied due to their capability of precision detection of rotation rates and extensive applications in navigation, guidance and motion control.
Xian Chu   +5 more
doaj   +4 more sources

Dynamically variable negative stiffness structures [PDF]

open access: yesScience Advances, 2016
A novel active structure supports loads while dynamically and continuously changing stiffness by more than 100× in less than 10 ms.
Christopher B. Churchill   +4 more
openaire   +3 more sources

H Optimization of Three-Element-Type Dynamic Vibration Absorber with Inerter and Negative Stiffness Based on the Particle Swarm Algorithm [PDF]

open access: yesEntropy, 2023
Dynamic vibration absorbers (DVAs) are extensively used in the prevention of building and bridge vibrations, as well as in vehicle suspension and other fields, due to their excellent damping performance. The reliable optimization of DVA parameters is key
Ting Gao   +4 more
doaj   +2 more sources

A Novel Sensor Prototype with Enhanced and Adaptive Sensitivity Based on Negative Stiffness Mechanism [PDF]

open access: yesSensors, 2020
Loess–mudstone/soil-rock interfacial landslide is one of the prominent landslide hazards that occurs in soil rock contacting zones. It is necessary to develop sensors with high sensitivity to weak and low frequency vibrations for the early warning of ...
Lijun Liu, Yongzhong Nie, Ying Lei
doaj   +2 more sources

Negative stiffness in gear contact

open access: yesApplied and Computational Mechanics, 2015
The tooth contact stiffness is very often included in dynamic mathematical models of gear drives. It is an important value for calculation of torsion eigenfrequencies as well as the dynamic properties of the whole transmission systems.
Půst L., Pešek L., Radolfová A.
doaj   +1 more source

Structural Mechanics of Negative Stiffness Honeycomb Metamaterials [PDF]

open access: yesJournal of Applied Mechanics, 2021
AbstractThe development of multi-stable structural forms has attracted considerable attention in the design of architected multi-materials, metamaterials, and morphing structures, as a result of some unusual properties such as negative stiffness and, possibly, negative Poisson's ratio. Multi-stability is achieved through a morphological change of shape
Mehreganian, N, Fallah, AS, Sareh, P
openaire   +3 more sources

UNIFORM RISK SPECTRA FOR NEGATIVE STIFFNESS SYSTEMS [PDF]

open access: yesProceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015), 2021
ISBN:978-618-85072-3 ...
Reggiani Manzo, Natalia   +3 more
openaire   +2 more sources

Semi-Active Cable Damping to Compensate for Damping Losses Due to Reduced Cable Motion Close to Cable Anchor

open access: yesApplied Sciences, 2022
The relative motion of transverse cable dampers is smaller than predicted by the taut string model because of the effects of bending stiffness and fixed support conditions.
Felix Weber   +4 more
doaj   +1 more source

Negative-Stiffness Structure Vibration-Isolation Design and Impedance Control for a Lower Limb Exoskeleton Robot

open access: yesActuators, 2023
The series elastic actuator (SEA) is generally used as the torque source of the exoskeleton robot for human–robot interaction (HRI). In this paper, an impedance control method for lower limb exoskeleton robots driven by SEA is presented.
Yaohui Sun, Jiangping Hu, Rui Huang
doaj   +1 more source

Further Optimization of Maxwell-Type Dynamic Vibration Absorber with Inerter and Negative Stiffness Spring Using Particle Swarm Algorithm

open access: yesMathematics, 2023
Dynamic vibration absorbers (DVAs) are widely used in engineering practice because of their good vibration control performance. Structural design or parameter optimization could improve its control efficiency. In this paper, the viscoelastic Maxwell-type
Yuying Chen   +3 more
doaj   +1 more source

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