Consider the accelerated life testing (ALT) of a system based on Miner’s rule of two stress levels. At each stress level, the life pdf is an exponential distribution f(N) = λexp(-λN). Given:
Stress level 1: λ1 = 0.04
Normal stress level: λn
A number of systems have been tested using the following condition:
n1 = 10 cycles, nn = 30
The experimental failure probability of the system is obtained as Pf (experiment) = 0.4
Using Trapezoidal rule to calculate the theoretical failure probability, find λn at the normal stress level.
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