University of California, Riverside

Department of Electrical and Computer Engineering



Diagnostics, Prognostics, and Health Management at Pratt & Whitney


Diagnostics, Prognostics, and Health Management at Pratt & Whitney
 
Ravi Rajamani
Diagnostics, Prognostics & Health Management, Pratt & Whitney Company

Date: Friday, February 10, 2006
Time: 11:00 am
Location: Bourns Hall A265

The increasing complexity and stringent performance requirements of modern jet engines have made engine health management an important component of aircraft operations. The goal is to lower lifetime ownership costs through increased fleet reliability and average time on wing. Continuous monitoring and early anomaly warning capability can buy precious time for the operator in terms of taking preventive actions. The ultimate goal is to improve operational safety, minimize downtime, and improve asset management via condition-based maintenance.

In this talk I will give a brief overview of what Pratt & Whitney is doing in this area, as well as present some results we have obtained using innovative diagnostics techniques. Specifically I will present results on data normalization and fault isolation. We have shown, for example, that a hybrid model using elements of physical laws and empirical techniques such as neural networks does a better job of predicting engine parameters better than either technique alone. We also use Kalman filtering techniques for fault isolation. I will also briefly share my thoughts on future directions for PHM.

About the speaker:

Ravi Rajamani has been with United Technologies Corporation for five years, first at its research center for three years. Currently he is with the Pratt & Whitney division. Pratt and Whitney is a leading maker of aircraft engines for commercial and military applications. Ravi was with the General Electric Company for ten years before joining UTC. While his interests have changed over the years, his primary focus has been in the area of controls and diagnostics of gas turbines for aerospace and industrial applications. He currently leads the Diagnostics, Prognostics & Health Management area at Pratt & Whitney. Ravi has a BTech (ME) from IIT Delhi, an MS (Aut) from IISc Bangalore, and a PhD (EE) from the University of Minnesota.
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Electrical and Computer Engineering
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