负载口独立控制负载敏感系统模式切换特性  

Research on characteristic of mode switch of separate meter in and meter out load sensing control system

作　　者：徐兵[1] 曾定荣[1] 葛耀峥[1] 刘英杰[1] 

机构地区：[1]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2011年第5期858-863,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50675203);国家863"高技术研究发展计划资助项目(2007AA041803);国家"十一五"科技支撑计划资助项目(2006BAF01B03-01)

摘　　要：传统负载敏感系统在多执行器复合运动而执行器负载差别较大时系统效率低,为改善系统效率,研究新型负载口独立控制负载敏感系统模式切换控制器的设计方法.通过理论推导对比承受轻、重负载执行器支路在不同工作模式下的能耗特性,以减少系统能耗为准则得出不同支路的工作模式选择标准及模式切换的控制方法,并通过实验方式验证所提出的模式切换方法的有效性.模式切换控制实验中执行器速度控制平稳,背腔压力波动小而且维持在低压值,改善了系统的节能性能.研究结果表明,模式切换方法切实可行,负载口独立负载敏感系统在保证系统速度控制特性的前提下,能够进一步提高系统的节能性能.Conventional Load Sensing （LS） system has low efficiency when multiple actuators with different loads are in motion simultaneously, in order to improve system efficiency, the work mode switch controller of a novel separate meter in and sepa rate meter out （SMISMO） LS system was studied. The characteristics of energy consumption and velocity control in different work modes for heavy load actuator and light load actuator were compared through theoretical derivation, and work mode selection criterion and work mode switch controller for corresponding actuators were designed with aim to reduce energy consumption, experiments were carried on to test the effectiveness of the designed mode switch controller. The oscillations of velocity and back chamber pressure are low during mode switch process, back chamber pressure is maintained at low value to improve energy saving characteristic. Obtained results show that the work mode switch controller is feasible, and SMISMO LS system can further improve energy saving characteristic while retaining good velocity control characteristic.

关 键 词：负载口独立控制 负载敏感 模式切换 速度控制 节能 

分 类 号：TH137.5[机械工程—机械制造及自动化]