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Circuit as a sensor, a practical approach toward embedded electronic prognostics

The maintainability and reliability of critical electronic systems such as radars and global positioning system (GPS) on military and commercial aircrafts is a significant concern. Practical condition assessment and prediction of remaining useful life for such systems offer significant potential for improved readiness and field reliability. This paper introduces the 'circuit as a sensor' concept as an innovative and practical PHM solution for electronic systems through proof of concept using radio frequency digital (RF/D) systems. To demonstrate the feasibility of this concept, an economical test platform operating in the frequency range representative of modern avionic systems, with available system and component features was selected. An experiment to study the effects of degradation from the highly accelerated tests on diagnostic features as well as derive failure progression trends was conducted. Results from this research are presented. The embedded diagnostic and prognostic capability developed is scalable and can be applied to broad class of electronic systems.