摘要
液压减振器两端橡胶节点能够保护作动器的安全,但其参数会对减振器的性能产生很大影响。将节点等效成并联的弹簧阻尼系统,建立了作动器橡胶节点的动力学模型,理论分析了节点刚度以及作动频率对作动力滞后相位的影响。充分考虑液压阀和负载的影响,利用SIMPACK和MATLAB建立了液压作动器和车辆系统的联合仿真模型,并对不同节点刚度的情况进行了仿真分析。结果表明:对于较低的工作频带,节点刚度对实际输出到车体上的作动力影响不大,但会造成作动器活塞杆的作动位移产生很大差异。最后,给出了实际应用中合理选择橡胶节点参数的建议。
The rubber joints on both ends of the hydraulic shock absorber can protect the safety of the actuator, but its parameters have a significant impact on the performance of the shock absorber. By equivalenting the joint to a parallel spring damping system, we establish a dynamic model of the actuator rubber joint. By this model, theoretical analyses of the influence of the joint stiffness and actuation frequency on the lag force phase are carried out. Fully considering the influence of hydraulic valves and loads, we establish a simulation model of hydraulic actuators and vehicle system combined SIMPACK and MATLAB, and various situations of different joint stiffness are analyzed. The results indicate that for lower operating frequency bands, the joint stiffness has little impact on the actual output force to the car body, while the actuation displacement of the actuator piston rod is definitely effected. Finally, the reasonable choice of the rubber joint parameters in practical application is recommended.
出处
《液压与气动》
北大核心
2017年第11期36-40,共5页
Chinese Hydraulics & Pneumatics
基金
国家重点研发计划(2016YFB1200501)
关键词
节点刚度
全主动控制
液压减振器
闭环控制
滞后相位
joint stiffness, active control, hydraulic shock absorber, closedloop control, lag phase
