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一、引言电子液压伺服疲劳试验机(下文简称试验机)的给定装置,它是试验机不可缺少的重要组成之一。目前,国内外大多数试验机的给定装置,基本上是由一台能产生正弦波、三角波、方波等波形的函数发生器和一台直流信号发生器所组成;有的还配有白噪声发生器,模拟实际波形的磁带,程序信号发生器等;为了用户外接特殊信号的方便,常常在装置上配有外接信号插口;一般地,用户都希望给定装置波形种类多、频率范围宽广、控制灵活、操作方便、连续工作时间长,性能稳定可靠。
I. INTRODUCTION The given device of electronic hydraulic servo fatigue testing machine (hereinafter referred to as testing machine) is one of the indispensable important components of testing machine. At present, most of the domestic and foreign testing machine given device, basically by a can produce sine wave, triangle wave, square wave function generator and a waveform composed of a direct current signal generator; some also with white Noise generator, tape to simulate the actual waveform, program signal generator, etc .; for the convenience of external special signal users, often with an external signal socket on the device; generally, users want a wide range of device waveform, wide frequency range , Flexible control, easy operation, long working hours, stable and reliable performance.