Influence of Oil Elastic Modulus on System Characteristics of Closed Pump-Controlled Motor
The influence of the elastic modulus of oil on the dynamic characteristics of hydraulic system can not be ignored,espe-cially under high pressure conditions.Taking the closed pump-controlled motor hydraulic system as the test object,the dynamic response performance of the system under the elastic modulus of each oil is tested,and the controller is used to complete the optimi-zation process.The results show that the system can maintain stable state under three kinds of elastic modulus of oil.When the elas-tic modulus of the oil is 1396MPa and 1593MPa,the time-domain parameters are very close to each other,and there is no over-shot.The rising time is consistent with the adjustment time,while the frequency domain indexes are somewhat different.At this time,the system obtains large value margin and phase margin,and reaches a more stable state.The system with the elastic modu-lus of oil of 1396MPa was optimized,and the rise control process and adjustment time of the optimized system were 1.55s and 5.32s respectively,which were greatly shortened compared with the initial system.The controller is used to significantly improve the system responsiveness,and the overshoot can also meet the design requirements.The research has a very good guiding value for the dynamic characteristic analysis and accurate control of the related hydraulic system.
Elastic Modulus of OilClosed SystemDynamic ResponsePump-Controlled MotorSystem Optimi-zation
万方数据
维普
