Hitachi HDS721025CLA382 Benutzerhandbuch
Hitachi hard disk drive specifications
42
6.6.4
Nonoperating shock
The drive will operate with no degradation of performance after being subjected to shock pulses with the
following characteristics
following characteristics
.
6.6.4.1
Trapezoidal shock wave
Approximate square (trapezoidal) pulse shape
Approximate rise and fall time of pulse is1 ms
Average acceleration level is 50 G. (Average response curve value during the time following the 1 ms rise
time and before the 1 ms fall with a time "duration of 11 ms")
time and before the 1 ms fall with a time "duration of 11 ms")
Minimum velocity change is 4.23 meters/second
6.6.4.2
Sinusoidal shock wave
The shape is approximately half-sine pulse. The figure below shows the maximum acceleration level and
duration.
duration.
Models
Accleration level (G)
Duration (ms)
1D/2D models
350
2
All models
150
11
Table 24 Sinusoidal shock wave
6.6.5
Nonoperating Rotational shock
All shock inputs shall be applied around the actuator pivot axis.
Duration
Rad/sec
2
1 ms
30,000
2 ms
20,000
Table 25 Rotational Shock