2D阀控电液激振器振动中心偏置量控制的研究  

The Research of Bias Control System for Electro-hydraulic Exciter with Two-dimensional Valve

作　　者：陆明江[1] 李胜[1] 阮健[1] 

机构地区：[1]特种装备制造与先进加工技术教育部重点实验室(浙江工业大学),浙江杭州310014

出　　处：《流体传动与控制》2013年第2期18-21,25,共5页Fluid Power Transmission & Control

摘　　要：为了消除2D阀控电液激振器由于加工误差和载荷不对称产生的单侧偏移,并且实现受控的零位偏移振动。提出了一种偏置控制方法。该方法是将一个数字伺服阀与2D阀并联,数字伺服阀、电-机械转换器和位移传感器构成活塞杆的位置闭环控制系统。通过对活塞杆的位置闭环实现激振器偏置量的控制。实验结果显示活塞杆位置闭环控制系统的阶跃响应时间为2.9s,稳态误差为3.04%。激振器以1Hz的频率作偏置振动时振动中心的稳态误差为0.3%,以100Hz的频率作偏置振动时振动中心稳态误差为1.35%。In order to eliminate the one sided offset due to machining error and load asymmetry, and to realize the controlled offset vibration. A sheme of a digital servo valve connected in parallel with a two-dimensional valve is proposed. Digital servo valve, the Electro-mechanical converter and displacement sensor formed the position closed-loop control system for the piston rod. Use this system to realize the bias control for the exciter. The result shows that the position closed-loop control system＇s step response time is 2.9 seconds, and the steady-state error is 0.76%. When the exciter works at a frequency of 1 Hz, the steady-state error of vibration central position is 0.3%, when the frequency comes to 100 Hz, the steady-state error is 1.35%. And it meets the expectation.

关 键 词：2D阀 偏置控制 电液激振器 

分 类 号：TH137[机械工程—机械制造及自动化]