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Failure modes and probabilities of a high redundancy actuator

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posted on 06.03.2008, 15:27 by Thomas Steffen, Jessica Davies, Roger Dixon, Roger M. Goodall, John T. Pearson, Argyrios C. Zolotas
A high redundancy actuator (HRA) is composed of a high number of actuation elements, increasing both the travel and the force over the power of an individual element. This provides inherent fault tolerance, because when an element fails, the capabilities of the actuator may be reduced, but it does not become dysfunctional. This paper analyses the likelihood of different reductions in capabilities, based on the reliability of the actuation elements used. The result is a probability distribution that quantifies the capability of the high redundancy actuator. Together with the required capabilities, this determines the fault tolerance of the actuator.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

STEFFEN, T. ... et al, 2008. Failure modes and probabilities of a high redundancy actuator. 17th IFAC World Congress, July 6-11, Seoul, Korea

Publisher

© The International Federation of Automatic Control (IFAC)

Publication date

2008

Notes

This is a conference paper

Language

en