| With the rapid ecomomic growth of world, energy consumption has been increased gradually, and crisis of energy became worsen and worsen. Hydraulic system has to meet not only the control performance requirement but also the effective utilization of resources. Secondary regulation system has many advantages, such as high efficiency, good controllability and recycling and reusing the dynamic energy and potential energy of the load. So inertial load system which has big quality or start-brake frequently drived by secondary regulation system can save a lot of energy, and has very important research value.Based on consulting relevant data, this paper summarizes the research and utilization situation of secondary regulation hydrostatic transmission system, analyzes the composition, operation principle characteristics and energy-saving princple of secondary regulation system. Using the mechanism modeling technology, based on hydraulic system dynamic modeling research of the secondary regulation inertial load system. The mathematical model consist of swashplate variable cylinder, secondary element and energy recovery system. System identification of secondary regulation inertial load system has been studied. The correctness of model has been verified by simulation results.On the basis of mathematical model, the simulation model of secondary regulation has been bulid with Matlab/Simulink?. The simulation results of control characteristics and energy recovery efficiency have been analyzed and compared under the different load inertia, acceleration, set speed, system pressure and initial state of accumulator.The secondary regulation inertial load test-bed has been estabilshed, and dSPACE soft-hardware integrated system has been used for controlling and data acquisition. Large quantity data of different influencing factors has been collected and analyzed. The experimental result proves the correctness of theoretical analysis, which is significant for practical application. |
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