|Precaution to Be taken during
Random vibration
testing
Vibration jig Platform Fixture:
Vibration jigs are specially designed as per the profile requirement for
UUT. It plays critical role during random vibration testing mode. It
must transfer uniform level of vibration effect on UUT and this effect
can be monitored by using vibration sensors placed on jig platform.
Sensors Mounting:
Use good quality monitoring sensors to see the misalignment between
applied input profile and profile presented on the surface of the jig.
Fig. 10 shows misalignment between input and output feedback profile
(which was monitored by sensors).There are many reasons for such type of
errors i.e. Improper fixing of jig on vibration actuator, use of
incorrect profile of jig, and loose mounting of sensors. After making
the appropriate changes in setup the output profile will follow the
input profile curve as shown in Fig. 11.