Balanced Technology Extended (BTX) Thermal/Mechanical Design Information
Thermal and Mechanical Design Guidelines 47
5.2.1.1 Random Vibration Test Procedure
Recommended performance requirement for a system:
• Duration: 10 min/axis, 3 axes
• Frequency Range: 5 Hz to 500 Hz
5 Hz @ .001 g2/Hz to 20 Hz @ 0.01 g2/Hz (slope up)
20 Hz to 500 Hz @ 0.01 g2/Hz (flat)
• Power Spectral Density (PSD) Profile: 2.2 G RMS
Figure
5-2. Random Vibration PSD
Vibration System Level
0.0001
0.001
0.01
0.1
1 10 100 1000
Hz
g
2
/Hz
+ 3 dB Control Limit
- 3 dB Control Limit
5.2.1.2 Shock Test Procedure
Recommended performance requirement for a system:
• Quantity: 2 drops for + and - directions in each of 3 perpendicular axes (i.e., total
12 drops).
• Profile: 25 G trapezoidal waveform
225 in/sec minimum velocity change. (systems > 20 lbm)
250 in/sec minimum velocity change. (systems < 20 lbm)
• Setup: Mount sample system on tester.
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