نتایج جستجو برای: passive damping
تعداد نتایج: 91983 فیلتر نتایج به سال:
Additional dampers are employed in order to decrease the dynamic response of structure against the earthquake and wind loading recently. In this study, two types of systems related to waste of inactive energy, i.e. frictional damper which is categorized in dampers dependent on movement and viscoelastic damper which is categorized in dampers dependent on velocity, in making steel structures resi...
Previous research has shown that passive (or ballistic) walking is an energetic efficient and mechanical cheap way of walking. Therefore ballistic walking would be suitable for apphcauons in rehabilitation technology and autonomous robots. Successful application would require a smooth hip trajectory in ordet to protect respectively the patient or electronics against large velocity changes due t...
We report on the design and performance of small optic suspensions developed to suppress seismic motion of out-of-cavity optics in the input optics subsystem of the Advanced Laser Interferometer Gravitational Wave Observatory. These compact single stage suspensions provide isolation in all six degrees of freedom of the optic, local sensing and actuation in three of them, and passive damping for...
This paper presents a hardware configuration for a long reach robotic arm in which passive dampers eliminate unwanted oscillation. This paper derives and reduces the equations of motion for the proposed configuration; then develops a "realistic" design. Using a single degree of freedom approximation, the paper presents and experimentally verifies equations for the dominant natural frequency and...
A helicopter structure experiences substantial highfrequency mechanical excitation from powertrain components such as gearboxes and drive shafts. The resulting structureborne vibration excites the windows which then radiate sound into the passenger cabin. In many cases the radiated sound power can be reduced by adding damping. This can be accomplished using passive or active approaches. Passive...
As the vibration of high speed train becomes fierce when the train runs at high speed, it is crucial to develop a novel suspension system to negotiate train’s vibration. This paper presents a novel suspension based on Magnetorheological fluid (MRF) damper and MRF based smart air spring. The MRF damper is used to generate variable damping while the smart air spring is used to generate field-depe...
Passive Landau cavities have been built, installed and taken into regular operation in the MAX II ring. The purpose of the Landau damping system is twofold: to decrease the energy spread of the beam induced by coupled bunch oscillations and to increase the Touschek life-time. The cavities are of the pillbox type operated at 1500 MHz, the third harmonic of the main RF. This paper describes the d...
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