Validation and verification of prognostic and health management technologies

Impact Technologies and the Georgia Institute of Technology are developing a Web-based software application that will provide JSF (F-35) system suppliers with a comprehensive set of PHM verification and validation (V&V) resources which will include: standards and definitions, V&V metrics for detection, diagnosis, and prognosis, access to costly seeded fault data sets and example implementations, a collaborative user forum for the exchange of information, and an automated tool for impartially evaluating the performance and effectiveness of PHM technologies. This paper presents the development of the prototype software product to illustrate the feasibility of the techniques, methodologies, and approaches needed to verify and validate PHM capabilities. A team of JSF system suppliers has been assembled to contribute, provide feedback and make recommendations to the product under development. The approach being pursued for assessing the overall PHM system accuracy is to quantify the associated uncertainties at each of the individual levels of a PHM system, and build up the accumulated inaccuracies as information is processed through the PHM architecture.