3.2.3 SYNTHETIC RANDOM VIBRATION

The major deterrent to universal acceptance of random vibration is the impact this type of test would have on program costs since a random vibration test facility is extremely expensive. A concept for economically generating random vibration was evolved which capitalizes on the fact that most major electronic equipment manufacturers maintain basic electrodynamic sinusoidal vibration test facilities. This technique, which was structured to utilize these existing facilities, employs a cassette tape deck, in lieu of expensive random programming devices, to excite the basic shaker system.

The detailed procedures necessary for generating random vibration using an electrodynamic vibration system and a cassette tape deck as a signal source are included herein as an Appendix.