Based on the V-type diesel engine crankshaft system, the paper combined the finite element method (fem) and multi-body dynamics method together, made a virtual simulation analysis. First, by 3d software and finite element software to establish the multi-body dynamic models of the crankshaft, bearing and piston, then simulated the actual engine working condition, and got the data such as cranksh...

The current paper describes the design and fabrication of a micromachined electrostatically suspended gyroscope. Electrostatic levitation is employed to suspend the rotor, eliminating the mechanical bearing and thus friction effects between the rotor and the substrate, hence improving long-term stability. The rate of rotation can be measured by detecting the torque-induced displacement of the s...

Effect of geometry on crushing behavior, energy absorption and failure mode of woven roving jute fiber/epoxy laminated composite tubes were experimentally studied. Investigations were carried out on three different geometrical types of composite tubes (circular, square and radial corrugated) subjected to axial compressive loading. It was observed in axial crushing study that the load bearing ca...

Position sensing is one of the crucial parts active magnetic bearing (AMB) system. The printed circuit board (PCB) eddy current position sensor a new type for AMB system, which makes compact structure, high quality, and low cost. In this article, an improved driver proposed sensor. includes excitation signal conditioning circuits. A crystal oscillator with power stage used to provide coil stabl...

This article investigates the localization problem of a network in 2-D and 3-D spaces given positions anchor nodes global frame internode relative measurements local coordinate frames. It is assumed that frames different have unknown orientations. First, an angle-displacement rigidity theory developed, which can be used to localize all free by known (local position, distance, bearing, angle, or...

As special equipment for storing energy, the safety performance of liquified natural gas (LNG) storage tanks under earthquake action is extremely important. To study dynamic characteristics large-scale LNG tank structure and response action, shaking table test numerical simulation analysis model are carried out. The results demonstrate that vibration frequency significantly reduced after isolat...

To clarify the factors affecting stability of deep-buried hydraulic tunnels containing pore water, elastoplastic theory and Mogi-Coulomb strength criterion were used to derive analytical solutions stress on surrounding rock-lining structure, tunnel wall displacement, plastic zone radius in rock under different operating conditions. During this process, seepage effect interaction considered. The...