Safety analysis of autonomous systems by extended fault tree analysis
Safety is of major concern in many autonomous functions in automotive
systems and aerospace. In these application areas it is standard to
use fault trees, and a natural question in many modern systems that
include sub-systems like diagnosis, fault-tolerant control, and
autonomous functions, is how to include the performance of these
algorithms in a fault tree analysis for safety. Many possibilities
exist but here a systematic way is proposed. It is shown both how
safety can be analyzed and how the interplay between algorithm design
in terms of missed detection rate and false alarm rate is included in
the fault tree analysis. Examples illustrate analysis of diagnosis
system requirement specification and algorithm tuning.
Jan Åslund, Jonas Biteus, Erik Frisk, Mattias Krysander and Lars Nielsen
International Journal of Adaptive Control and Signal Processing,
2007
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