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一般的电液伺服系统目前已在材料试验机中得到了广泛的应用。它由电液伺服阀控制液压缸,由液压缸对试件施加作用力来进行各种试验。这种控制方式大部分的能量损耗在伺服阀和溢流阀的节流口上,因此效率很低,在试验时消耗的功率较大。为节省能源,国外已研出各种谐振式疲劳试验机并投入使用,国内有些单位在使用这些试验机,也有某些单位正在研究中,有关资科一般只介绍了它的工作原理,对谐振频率应该怎样计算,哪些参数对谐振频率有关,这些参数相互
The general electro-hydraulic servo system has been in the material testing machine has been widely used. It consists of electro-hydraulic servo valve control hydraulic cylinder, hydraulic cylinder exert force on the specimen for a variety of tests. Most of this control energy loss in the servo valve and relief valve orifice, so the efficiency is very low, the power consumed in the test larger. To save energy, foreign countries have developed a variety of resonant fatigue testing machine and put into use some of the units in the use of these test machines, there are some units under study, the relevant information generally only describes its working principle of resonance How to calculate the frequency, what parameters are related to the resonant frequency, these parameters mutual