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The pneumatic system based on switch valves has many advantages, such as low cost, high performance, easy maintenance, and so on. The pressure fluctuation produced by open and close of the switch valve will impact on the accuracy of pneumatic position system. A new pneumatic system is established containing an asymmetric cylinder and four switch valves. The Pulse-Width Modulation (PWM) is used to...
A simulation model was developed to study static characteristic of ball bearing with annular orifices. The influence of pre-orifice diameter was discussed through simulation analysis. Simulation results show that for constant supply upstream pressure, the larger pre-orifice diameter is the larger volumetric flow rate of pre-orifice is; and for constant pre-orifice diameter, relation between volumetric...
A simulation model was developed to study the static characteristic of a regulator valve with large flow capacity. The regulator valve couples motion of double poppet valves with the shaft. Then a detailed theoretical model is carried out to explain working principle of the valve. And the simulation model is conducted based on that theoretical model. While simulating the established model, the damping...
Hydraulic power conversion system is widely used as a power take-off system in wave energy converters to realize the aim that transforms wave energy into hydraulic energy. The efficiency of transformation is an interesting research topic which attracts many researchers' attention. In this paper, a control strategy through combining hydraulic cylinders is proposed for improving the efficiency of transformation...
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