NASA 1996 SBIR Phase I


PROPOSAL NUMBER : 96-1 01.15-2321

PROJECT TITLE : Impulse Feedback-Based Health Management System for Aircraft Engine Systems

TECHNICAL ABSTRACT (LIMIT 200 WORDS)

Both historical and recent experience shows that aircraft require improved monitoring and maintenance of engine system condition. Vibration-based health management systems generally depend upon the dynamic response of a machine or structure to operational forces. They cannot reliably determine causes of anomalies. CETI proposes to use Micro Electrical Mechanical Systems (MEMS) technology to deploy a proven troubleshooting technique in a real-time health management system for turbine engines and critical airframe components. This technology will directly support the objective of Subtopic 01.15 for real-time measurement techniques to acquire aerodynamic, structural, and propulsion system performance characteristics in flight and to safely expand the flight envelope of aerospace vehicles. The proposed system would be capable of fault identification, diagnosis, and prediction of remaining component life. The technique is based on combining natural and impulse excited response data to extract system component characteristics. The proposed effort would demonstrate the feasibility of transitioning the technique to a health management system in a bread-board MEMS. System components (on-board exciter, sensors, adaptively modifiable component and tribological models, and evaluation software) can then be incorporated in a MEMS device. Successful deployment of this technology would provide substantial new health management capabilities for aircraft engines and critical stationary components.
POTENTIAL COMMERCIAL APPLICATIONS
Achievement of the project goals will provide NASA with a health management system that reliably protects advanced engine systems from unexpected failures. The proposed system provides assessment of operability and remaining time- to-failure for both critical stationary components and all types of turbomachinery, particularly aircraft gas turbines, rocket engine fuel and oxidizer pumps, and other turbomachinery subsystems. Industrial applications, which also might have some application to aircraft auxiliary systems, include pumps, compressors, steam turbines, fans, and large electric motors.
NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR
William D. Marscher
Concepts ETI, Inc.
4 Billings Farm Road
White River Jct., VT 05001
NAME AND ADDRESS OF OFFEROR
Concepts ETI, Inc.
4 Billings Farm Road
White River Jct., VT 05001