大型装备电液系统统一切换控制  

Unified switching control of an electro-hydraulic system for large equipment

作　　者：许文斌[1,2] 谭建平[1] XU Wenbin;TAN Jianping(State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China;College of Aviation Electronic Equipment Maintenance,Changsha Aeronautical Vocational and Technical College,Changsha 410124,China)

机构地区：[1]中南大学高性能复杂制造国家重点实训室,湖南长沙410083 [2]空军航空维修技术学院航空电子设备维修学院,湖南长沙410124

出　　处：《哈尔滨工程大学学报》2018年第11期1861-1866,共6页Journal of Harbin Engineering University

基　　金：国家重点基础研究发展计划(2014CB049405);高性能复杂制造国家重点实验室自主探索基金项目(zzyjkt2013);湖南省教育厅科学研究项目(16C0016)

摘　　要：针对大型装备电液系统非线性、负载时变等特点,建立了阀控非对称缸液压系统动力学模型,构建了基于等效负载的系统分段切换模型。提出了统一切换控制策略,对切换控制律进行修正优化,将切换控制增益等效为一个常量和一个切换分量,通过调整切换分量实现各子模型的切换,进一步简化控制算法。仿真和实验对比了不同参考速度时,固定负载和变负载情况下系统速度响应特性。结果表明采用统一切换控制可使系统的速度响应稳态误差保持在0. 2 mm/s的范围内,证明了统一切换控制可以提高时变负载作用下系统速度响应精度和稳定性。Considering the problems of the nonlinearity and time-varying load of electro-hydraulic system for large equipment,the dynamic model was established.Based on the equivalent load,the segmenting switching model was constructured.A unified switching control strategy was proposed.For the purpose of simplifying the control algorithm,the switching control gain was revised equivalent to a constant and a small switching component for optimizating the control law,and the switching of different sub models was implementated by adjusting the switching gain.Simulation and experiment compared the speed response characteristic of the system under the conditions of constant load and varying load with different reference velocity.The results show that the unified switching control can keep the speed response steady-state error of the system in the range of 0.2 mm/s.As a result,the unified switching control can improve the speed response accuracy and stability of the system under the time-varying load.

关 键 词：大型装备 电液系统 时变负载 切换系统 统一切换控制 稳态误差 

分 类 号：TH117[机械工程—机械设计及理论]