A graphical language for reliability model generationA graphical interface capability of the hybrid automated reliability predictor (HARP) is described. The graphics-oriented (GO) module provides the user with a graphical language for modeling system failure modes through the selection of various fault tree gates, including sequence dependency gates, or by a Markov chain. With this graphical input language, a fault tree becomes a convenient notation for describing a system. In accounting for any sequence dependencies, HARP converts the fault-tree notation to a complex stochastic process that is reduced to a Markov chain which it can then solve for system reliability. The graphics capability is available for use on an IBM-compatible PC, a Sun, and a VAX workstation. The GO module is written in the C programming language and uses the Graphical Kernel System (GKS) standard for graphics implementation. The PC, VAX, and Sun versions of the HARP GO module are currently in beta-testing.
Document ID
19910046453
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Howell, Sandra V. (NASA Langley Research Center; Lockheed Engineering and Sciences Co. Hampton, VA, United States)
Bavuso, Salvatore J. (NASA Langley Research Center Hampton, VA, United States)
Haley, Pamela J. (Computer Sciences Corp. Hampton, VA, United States)