A 250 kW / 5 kWh engineering prototype Flywheel Energy Storage System (FESS) was designed, fabricated and component tested by Adelwitz Technologiezentrum GmbH (ATZ) and L-3 Communications Magnet Motor GmbH (MM). A heavy – load vertical 0.6 ton rotor is suspended totally magnetically by an HTS radial-passive bearing on the top together with a PM bearing at the bottom. Further features are the fl...

Chromaticity compensation (Q 0 x Q 0 y 0) is required to avoid the \head-tail" eeect in all high-energy accelerators. A potential advantage of the \MM obius" scheme, or any other strongly coupled lattice, is that, because of cooperation between damping in the two planes, a less-restrictive condition, Q 0 x ?Q 0 y , should be satisfactory. This \chromaticity sharing" concept has been tested at C...

It is of great significance for improving the landing stability and adjusting the attitude of equipment base by designing a cardan mechanism in the asteroid lander. In the paper, a cardan mechanism having cushion and attitude adjusting functions is designed for the asteroid lander. The cardan mechanism contains electromagnetic damping, belt transmission and cross-shaft, and it has merits of adj...

Trains including reciprocating machines are subject to the most varied and often most severe torsional disturbances in comparison to other machinery classes. If crankshaft or rotating component failures occur as a result of shaft torsional oscillations, the consequences can be catastrophic. In this paper a new comprehensive model and solution method using analytical formulations are developed t...

Malaysians were reported to have the most number of Facebook friends, spend more time on Facebook and might be addicted to Facebook as well. This paper explored Facebook usage pattern, motivations and psycho logical/behavioural factors affecting the users. A focus group study was first conducted to explo re motives to use Facebook and symptoms related to excessive Facebook usage. The themes eme...

In this research, we integrate a three-dimensional micro-/nano-lattice structure metamaterial with conventional helical gears using composite method to reduce the vibration. A comprehensive six-degree-of-freedom nonlinear dynamics model is constructed analyze vibration characteristics of resulting mechanical gear pair. The incorporates crucial factors such as meshing damping, error excitation, ...