Vertical and Horizontal High Frequency Electrodynamics Type Vibration Tester Reasonable Useful

Reasonable Useful Vertical and Horizontal High Frequency Electrodynamics Type Vibration Tester

What's the difference between RANDOM & SINE test?

Sinusoidal vibration tests are not as helpful as random testing, because a sine test focuses upon a single frequency at any one time. A random vibration test, on the other hand, excites all the frequencies in a defined spectrum at any given time. Consider Tustin’s description of random vibration – “I’ve heard people describe a continuous spectrum, say 10-2000Hz, as 1990 sine waves 1Hz apart. No, that is close but not quite correct. Sine waves have constant amplitude and phase, cycle after cycle. Suppose that there were 1990 of them. Would the totality be random? No. For the totality to be random, the amplitude and starting phase of each slice would have to vary randomly, unpredictably. Unpredictable variations are what we mean by random. Broad-spectrum random vibration contains not sinusoids but rather a continuum of vibrations.”

Test system composition

1. One-piece horizontal vibration generator
2. Vertical expansion table
3. Cooling fan with muffler
4. Digital switching power amplifier
5. Multi-function vibration control measuring instrument.

Specification