变刚度电液力加载系统性能研究  

Investigation of Electro-Hydraulic Loading System with Variable Stiffness

作　　者：傅晓云[1] 贺向宗[1] 李宝仁[1] 

机构地区：[1]华中科技大学,武汉430074

出　　处：《中国机械工程》2015年第2期192-195,共4页China Mechanical Engineering

摘　　要：针对海洋船舶拖曳系统半实物仿真的需要,设计了以钢丝绳为力传递介质的电液力加载系统。建立了力加载系统的数学模型,通过试验得出了钢丝绳刚度与加载力的对应关系式;分析了钢丝绳刚度对系统性能、控制器设计的影响,得出钢丝绳刚度减小会导致力加载系统频宽减小、滞后增大的结论。基于此设计了变增益前馈补偿控制器。试验结果表明,该方法提高了系统加载力跟踪精度。An electro-hydraulic loading system,conveying force by wire-rope,was designed to meet the requirements of hardware-in-the-loop simulations of the towing system in the marine vessel.A mathematical model of the electro-hydraulic loading system was presented herein.The relationship ex-pression between the wire-rope stiffness and the loading force was derived from the results of experi-ments.Through the analysis of the effect of the wire-rope stiffness on the performance of the loading system and the design of the controller,it is concluded that the frequency width minifies and hysteresis increases with the wire-rope stiffness decreases.Then a variable gain feed-forward compensation con-troller was designed.Experimental results show that this method can improve force tracking accuracy of the system.The paper provides a theoretical basis for high performance electric hydraulic loading system controller design with variable stiffnesses.

关 键 词：电液力加载 钢丝绳刚度 复合控制 输入前馈 

分 类 号：TH137[机械工程—机械制造及自动化]