Motion Characteristics Optimization of Hydraulic Cylinder of Integrated Energy Storage Excavator Boom
The integrated energy storage hydraulic cylinder is a multi-chamber hydraulic cylinder,which is formed by the combination of differential cylinder and plunger cylinder.It is directly connected with the accumulator to form an energy storage circuit,which can recover and reuse potential energy.Although this method has efficient potential energy recycling and wide applicability,the introduction of accumulator makes it difficult to achieve high-precision operation of integrated energy storage hydraulic cylinder.In order to solve the above problem,a collaborative control scheme of main circuit and energy storage circuit is proposed.In this scheme,the proportional valve is introduced into the energy storage circuit,and it is controlled cooperatively with the main circuit valve to improve the motion characteristics of the boom in the excavator.The co-simulation model of the excavator is established in SimulationX software environment,and the motion characteristics of the boom under the control scheme are analyzed and compared with that under the traditional control scheme.The simulation results show that the proposed control scheme can reduce the influence of the accumulator on the motion characteristics of the boom,and improve the speed and displacement control accuracy of the integrated hydraulic cylinder of energy storage.
integrated hydraulic cylinderhydraulic-gas energy storagecooperative control
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