+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > Kobayashi, Takahisa  Author > Simon, Donald L.  NASA Center > Glenn Research Center  Publication Year > 2001-2010 > 2007  Subject > A-C > Aircraft Propulsion And Power  Availability Options > Online > PDF  Item/Media Type > Conference Paper  Item/Media Type > NASA Report > Technical Memorandum (TM)  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Integration of On-Line and Off-Line Diagnostic Algorithms for Aircraft Engine Health Management Author(s): Kobayashi, Takahisa; Simon, Donald L. Abstract: This paper investigates the integration of on-line and off-line diagnostic algorithms for aircraft gas turbine engines. The on-line diagnostic algorithm is designed for in-flight fault detection. It continuously monitors engine outputs for anomalous signatures induced by faults. The off-line diagnostic algorithm is designed to track engine health degradation over the lifetime of an engine. It estimates engine health degradation periodically over the course of the engine s life. The estimate generated by the off-line algorithm is used to update the on-line algorithm. Through this integration, the on-line algorithm becomes aware of engine health degradation, and its effectiveness to detect faults can be maintained while the engine continues to degrade. The benefit of this integration is investigated in a simulation environment using a nonlinear engine model. NASA Center: Glenn Research Center Publication Date: September 2007 Document Source: CASI Online Source: View PDF File Document ID: 20070031718 Publication Information: Number of Pages = 17 Report Number: ARL-TR-4090; E-16132; NASA/TM-2007-214980 Contract-Grant-Task Number: 122711.03.11.03.04.01 Price Code: A03 Meeting Information: ASME/IGTI Turbo Expo 2007, 14-17 May 2007, Montreal, Canada Keywords: ALGORITHMS; AIRCRAFT ENGINES; SYSTEMS HEALTH MONITORING; ON-LINE SYSTEMS; FAULT DETECTION; GAS TURBINE ENGINES; SYSTEMS INTEGRATION; KALMAN FILTERS; ENGINE INLETS; DEGRADATION; SENSORS; NONLINEARITY; INLET PRESSURE; Accessibility: Unclassified; No Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2007-10-26 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007