Microvibration in spacecraft

An Active Microvibration Isolation System

Fuzzy Sliding Mode for Spacecraft Formation Control in Eccentric Orbits

The problem of relative motion control for spacecraft formation flying in eccentric orbits is considered in this paper. Due to the presence of nonlinear dynamics and external disturbances, a robust fuzzy sliding mode controller is developed. The slopes of sliding surfaces of the conventional sliding mode controller are tuned according to error states using a fuzzy logic and reach the pre-define...

Development of a Vibration Device for Grinding with Microvibration

This study aimed to develop a device to facilitate grinding experiments with microvibration for analyzing the vibration effect on surface finish of ground surfaces. A microvibration device was designed and fabricated. It can be used to provide microvibration to the workpiece vertically and/or horizontally during grinding. The relationship of the driving voltage, vibration displacement, and freq...

Effect of acetylcholine on the microvibration of the body surface.

In our previous studies,1)2) as to the microvibration (MV) of the body surface in the rabbit, OZAKI1) and FUZIWARA2) have reported that adrenaline and noradrenaline were capable of augmenting and inhibiting the MV according to small and large doses injected, respectively. It was suggested in their experiments that the inhibitory effect of adrenaline and noradrenaline on the MV might be attribut...

Coupled microvibration analysis of a reaction wheel assembly including gyroscopic effects in its accelerance

This article discusses the coupled microvibration analysis of a cantilever configured Reaction Wheel Assembly with soft-suspension system. A RWA–seismic mass coupled microvibration measurement system is presented and its model validated against test results. The importance of the RWA driving point accelerances in coupled microvibration designed to measure the driving point accelerances in both ...