DESIGN FOR RELIABILITY: AN EVENT- AND FUNCTION-BASED FRAMEWORK FOR FAILURE BEHAVIOR ANALYSIS IN THE CONCEPTUAL DESIGN OF COGNITIVE PRODUCTS
DS 68-5: Proceedings of the 18th International Conference on Engineering Design (ICED 11), Impacting Society through Engineering Design, Vol. 5: Design for X / Design to X, Lyngby/Copenhagen, Denmark, 15.-19.08.2011
Editor: Culley, S.J.; Hicks, B.J.; McAloone, T.C.; Howard, T.J. & Malmqvist, J.
Author: Sop Njindam, Thierry; Paetzold, Kristin
Section: Design for X, Design to X
Product complexity in modern engineering is rising at an ever-increasing rate for several reasons. On the one hand, designers are aimed at extending the functionality of products, thus, integrating them in human living environments and optimizing their interaction with humans. On the other hand, this functionality extension results from the synergetic integration of different disciplines. However, an important prerequisite for the market launch of these products is their ability to meet the previously defined requirements, particularly safety and reliability. In this perspective, we proposed a framework for the early analysis of the functional behavior of cognitive products. We assume that the failure of a function is linked with a system internal state transition. It is then possible to model the sequencing of different possible states, and by this means different functional failures which lead to critical feared states, thus, taking into account the random nature of the occurring failures. The approach presented is explained using an extended stochastic petri net with switching time to model the failure behavior of a cognitive walker
Keywords: FAILURE BEHAVIOUR ANALYSIS; DESIGN FOR RELIABILITY; COGNITIVE PRODUCTS