Reliability Based Design Recommendations for an Electromechanical Actuator Test Stand

Michael T. Koopmans, Rudy C. Hooven, and Irem Y. Tumer
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Full Paper
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phmc_10_037.pdf1.01 MBOctober 11, 2010 - 2:53pm

Quality and robust data sets of faulted electromechanical actuators (EMAs) with regard to specific parameters has been sought recently to strengthen aircraft prognostics and health management (PHM) systems. Primary flight surface control actuators are of particular interest because the lack of known failure data erodes the confidence of the component and subsequently sub-system health predictions. To aid in this research, an EMA test stand has been designed to help in predicting the life and wear characteristics of faulted actuators with respect to their nominal counterparts. Fault seeds are injected into the actuator during in-flight experiments while actuator parameters are recorded and then post-processed on the ground. The study presented in this paper is an assessment of the availability and reliability of the test stand design. Specifically, using the performance history of similar components in the field, this paper demonstrates design aspects of the test stand that affect test system design and fault data quality. It validates and offers design recommendations to increase test stand availability and ability to supply quality and robust fault to failure data sets.

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