MIL-DTL-82909A (OS)
FIGURE 1. Axis orientation for the shock and vibration test and impact
orientations for the six- and forty-foot drop tests.
(2) Resonance dwell (5 Hz to 2,000 Hz): The two battery packs shall be vibrated along
axis I at 70°F for 30 minutes at each resonant point. In the event that more than four points are noted, the
four most severe shall be used for resonance dwell. The response shall be peaked during the dwell period.
The test levels and schedule are shown in figure 2 and table VI, respectively. After the resonance dwell
along axis I, the battery packs shall be visually inspected for external damage.
(3) Sinusoidal Cycling (5 Hz to 2,000 Hz): The two battery packs shall be subjected to the
sinusoidal vibration cycling along axis I at 70°F with the frequency varying logarithmically from 5 Hz to
2,000 Hz and back to 5 Hz in approximately 20 minutes. The test levels and schedule are shown in figure 2
and table VI, respectively. Depending on the number of resonant points found in the search, the battery
pack shall be vibrated for 180 minutes minus the time spent in dwell. After the vibration cycling along axis
I, the battery packs shall be visually inspected for external damage.
(4) After completion on the non-gunfire vibration along axis I, the procedure shall be repeated
along the axis II orientation.
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