Physical Modeling for Anomaly Diagnostics and Prognostics

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,929.00
Award Year:
2011
Program:
SBIR
Phase:
Phase II
Contract:
NNX11CA04C
Award Id:
n/a
Agency Tracking Number:
094059
Solicitation Year:
2009
Solicitation Topic Code:
A1.12
Solicitation Number:
n/a
Small Business Information
AZ, Tucson, AZ, 85704-5645
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
Y
Duns:
157955597
Principal Investigator:
NeilKunst
Principal Investigator
(520) 742-3300
neil.kunst@ridgetopgroup.com
Business Contact:
MilenaThompson
Business Official
(520) 520-3300
milena@ridgetop-group.com
Research Institute:
Stub




Abstract
Ridgetop developed an innovative, model-driven anomaly diagnostic and fault characterization system for electromechanical actuator (EMA) systems to mitigate catastrophic failures.Ridgetop developed a MIL-STD-1553 bus monitor and a MIL-STD-1553 bus controller that simulates the aircraft data bus, reads the environmental (i.e., altitude) and operational (i.e., response of system) data of a system and determines if a fault is manifesting; and if true determines the root cause and symptoms of the fault. Once an anomaly is detected, the Model-based Avionic Prognostic Reasoner (MAPR) solves a user-outlined state-space model, symbolically, using a Gauss-Newton optimization method and the information from the MIL-STD-1553 bus. This algorithm outputs a list of best fitting parameters to match the command to the actual performance. Rules are programmed in, based on results from principal component analysis . The rules determine both fault mode and the severity of that fault. The rules can distinguish between two failure modes: Mechanical jam and MOSFET failure, and healthy.The real-time processing will allow for critical evolutions in flight safety and provides a game-changing approach to condition-based maintenance. Once deployed, flight safety can be improved by allowing the on-board flight computers to read from the MAPR and update their control envelope based on its evaluations, reducing damage propagation and increasing operational safety.In Phase 2, we will develop a functioning ground-based prototype of the technology to show the efficacy of the method. A ground-based version of the tool is the best candidate for development to ease adoption by testing in a low-risk environment; this tool will be demonstrated at the end of Phase 2. The MAPR concept is also applicable to any system with a state-space representation but at this point it has been developed with EMAs in mind.The MAPR prototype is at TRL 5 and will reach a TRL 7 by the end of Phase 2.

* information listed above is at the time of submission.

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