Systems reliability for phased missions
Rachel A. La Band
2134/34438
https://repository.lboro.ac.uk/articles/thesis/Systems_reliability_for_phased_missions/9213071
The concept of a phased mission has been introduced as a sequential set of objectives
that operate over different time intervals. During each phase of the mission, the
system may alter such that the logic model, system configuration, or system failure
characteristics may change to accomplish a required objective.
A new fault tree method has been proposed to enable the probability of failure in each
phase to be determined in addition to the whole mission unreliability. Phase changes
are assumed to be instantaneous, and component failure rates are assumed to be
constant through the mission. For any phase, the method combines the causes of
success of previous phases with the causes of failure for the phase being considered to
allow both qualitative and quantitative analysis of both phase and mission failure. A
new set of Boolean laws is introduced to combine component success and failure
events through multiple phases so that the expression for each phase failure can be
reduced into minimal form. [Continues.]
2018-08-09 16:06:21
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Engineering not elsewhere classified