Virtual Qualification of Electronic Hardware - NEPP - NASA

Use
Category
Section 1
Section 2
Life Cycle Loading Characterization
The temperatures shown in Table 1 were taken as inputs to the thermal analysis.
Section 1 and section 2 are combined to account for one cycle.
Tmin
( 0 C)
9.5
12.5
Tmax
( 0 C)
49
82
AS900 nominal
temperature profile for
one cycle
Temperature ( o Temperature ( C)
o Temperature ( C)
o C)
Ramp time to
Tmax/ to Tmin
35 min/ 35 min
50 min/ 15 min
120
100
80
60
40
20
0
-20
-40
-60
Section 1
Dwell at Tmax
/Tmin
25 min /30 min
35 min /30 min
Table 1. Sections of one thermal cycle
Time of
Cycles
175 min
160 min
CALCE Electronic Products and Systems Center University of Maryland
c:\mydocuments\presentations\jpl010516.ppt
Total time
365 days/ 10
year
365 days/ 10
year
0 50 100 150 200 250
Time (minutes)
Section 2