Abstract
The present report deals with an analysis of a pressure-compensated variable displacement vane pump regarded as a load-compensating control system. On the basis of experimental data of an article on the market, the effective transfer function of he mechanical system can be reduced to a form of 1st order lag system. Furthermore including the pressure surge in actual circuits due to the sudden change of the oad flow into the analysis, it becomes clear that the entire transfer function of the mechanical and hydraulic system has a form of phase lead system. The theoretical solution of the step response of the output pressure is similar to the experimental data. After the consideration of effective parameters in the entire system based on he above results, several guides for parameter design are to improve the load-sensing function and to optimize its step response.
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