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A Diagnostic Approach for Electro-Mechanical Actuators in Aerospace SystemsElectro-mechanical actuators (EMA) are finding increasing use in aerospace applications, especially with the trend towards all all-electric aircraft and spacecraft designs. However, electro-mechanical actuators still lack the knowledge base accumulated for other fielded actuator types, particularly with regard to fault detection and characterization. This paper presents a thorough analysis of some of the critical failure modes documented for EMAs and describes experiments conducted on detecting and isolating a subset of them. The list of failures has been prepared through an extensive Failure Modes and Criticality Analysis (FMECA) reference, literature review, and accessible industry experience. Methods for data acquisition and validation of algorithms on EMA test stands are described. A variety of condition indicators were developed that enabled detection, identification, and isolation among the various fault modes. A diagnostic algorithm based on an artificial neural network is shown to operate successfully using these condition indicators and furthermore, robustness of these diagnostic routines to sensor faults is demonstrated by showing their ability to distinguish between them and component failures. The paper concludes with a roadmap leading from this effort towards developing successful prognostic algorithms for electromechanical actuators.
Document ID
20090033810
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Balaban, Edward
(NASA Ames Research Center Moffett Field, CA, United States)
Saxena, Abhinav
(Research Inst. for Advanced Computer Science Moffett Field, CA, United States)
Bansal, Prasun
(NASA Ames Research Center Moffett Field, CA, United States)
Goebel, Kai Frank
(NASA Ames Research Center Moffett Field, CA, United States)
Stoelting, Paul
(Moog, Inc. East Aurora, NY, United States)
Curran, Simon
(Moog, Inc. East Aurora, NY, United States)
Date Acquired
August 24, 2013
Publication Date
March 7, 2009
Subject Category
Avionics And Aircraft Instrumentation
Report/Patent Number
ARC-E-DAA-TN-339
IEEEAC-Paper-1345
Meeting Information
Meeting: 2009 IEEE Aerospace Conference
Location: Big Sky, MT
Country: United States
Start Date: March 7, 2009
End Date: March 14, 2009
Sponsors: American Inst. of Aeronautics and Astronautics, Institute of Electrical and Electronics Engineers
Funding Number(s)
WBS: WBS 645846.02.07.01.13.01
Distribution Limits
Public
Copyright
Other

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