摘要
电液激振器受传统的电液伺服阀频响特性的限制，其激振频率难以提高，采用2D阀替代传统伺服阀组成电液激振器的方案，该激振器通过增加阀芯的旋转速度来提高其激振频率，同时将该电液激振器应用于4轴高频结构试验系统。对试验系统的结构和工作原理进行了分析讨论，包括频率、幅值和相位的控制方法。基于系统的频响仿真分析，提出了4个作动器的同步控制策略，对理论分析进行实验验证。试验结果表明：该电液四轴强度疲劳试验系统能在40~200Hz范围内对试验对象进行同步加载试验,其频率、幅值连续可控。
Abstract
In the proposed scheme of electrohydraulic vibration exciter, a 2D valve (two-dimensional control valve) is used to replace conventional servo valve to enhance frequency response capability by increasing the rotary speed of the spool of the 2D valve. This electrohydraulic vibration exciter is applied to a 4-axis high-cycle structure testing system. The structure and working principle, including the control method of frequency, amplitude and phase, of the testing system is described and discussed. Based on a simulation analysis to frequency response of the system, the control strategy of the synchronization for 4 hydraulic actuating cylinders is developed. The measured vibration wave is given to validate the theoretical analysis. It is classified that the vibration of the tested object can be excited synchronously in four-axis with the frequency 40~200Hz adjustable, and the frequency, amplitude and phase can be controlled continuously.
关键词
高频 /
疲劳试验 /
电液伺服
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Key words
High frequency /
Fatigue test /
Electrohydaulic servo
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贾文昂;阮健;李胜;裴翔;俞浙青;朱发明.
电液四轴高频结构强度疲劳试验系统[J]. 振动与冲击, 2010, 29(5): 86-90
JIA Wen-ang;RUAN Jian;LI Sheng;PEI Xiang;YU Zhe-qing;ZHU Fa-ming .
Four-axis high-frequency structural strength fatiguetest system[J]. Journal of Vibration and Shock, 2010, 29(5): 86-90
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脚注
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