Robot reliability using fuzzy fault trees and Markov models

Martin Leuschen; Ian David Walker; Joseph R. Cavallaro

doi:10.1117/12.256340

30 October 1996 Robot reliability using fuzzy fault trees and Markov models

Martin Leuschen, Ian David Walker, Joseph R. Cavallaro

Proceedings Volume 2905, Sensor Fusion and Distributed Robotic Agents; (1996) https://doi.org/10.1117/12.256340
Event: Photonics East '96, 1996, Boston, MA, United States

Abstract

Robot reliability has become an increasingly important issue in the last few years, in part due to the increased application of robots in hazardous and unstructured environments. However, much of this work leads to complex and nonintuitive analysis, which results in many techniques being impractical due to computational complexity or lack of appropriately complex models for the manipulator. In this paper, we consider the application of notions and techniques from fuzzy logic, fault trees, and Markov modeling to robot fault tolerance. Fuzzy logic lends itself to quantitative reliability calculations in robotics. The crisp failure rates which are usually used are not actually known, while fuzzy logic, due to its ability to work with the actual approximate (fuzzy) failure rates available during the design process, avoids making too many unwarranted assumptions. Fault trees are a standard reliability tool that can easily assimilate fuzzy logic. Markov modeling allows evaluation of multiple failure modes simultaneously, and is thus an appropriate method of modeling failures in redundant robotic systems. However, no method of applying fuzzy logic to Markov models was known to the authors. This opens up the possibility of new techniques for reliability using Markov modeling and fuzzy logic techniques, which are developed in this paper.

Citation Download Citation

Martin Leuschen, Ian David Walker, and Joseph R. Cavallaro "Robot reliability using fuzzy fault trees and Markov models", Proc. SPIE 2905, Sensor Fusion and Distributed Robotic Agents, (30 October 1996); https://doi.org/10.1117/12.256340

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