Achieving Reliability Goals for an EFV LRU through Laboratory Testing
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Aggressive field and laboratory testing of the Expeditionary Fighting Vehicles (EFV) Hull Electronics Unit (HEU) resulted in a highly reliable product, and provides a qualitative comparison of different test technologies and philosophies. Test methods include qualification, reliability growth testing (RGT), statistical reliability testing (SRT), and hybrid SRT/RGT. Test technologies include traditional single-exciter single-axis (SESA) electrodynamic (ED) shakers, multi-exciter multi-axis (MEMA) ED shakers, and pneumatic repetitive shock (RS).
Qualitative comparison of the different test methods show that qualification, RGT, and SRT with random vibration are all highly useful methods in determining design ruggedness. The applicability of either method is determined by the individual cost-schedule-quality needs of a program. Of the test technologies used, MEMA shaker technology produces greatest ability to apply test results to reliability information.
Keywords: RAMS 2011 Proceedings - Accelerated Life Testing - Product Reliability