Electronic Trend Monitoring and Exceedance Recording Systems: A Means to Improved Turbine Engine Reliability PUBLIC ACCESS

[+] Author Affiliations
Michael G. Moore

Semco Instruments, Inc., North Hollywood, CA

Paper No. 87-GT-87, pp. V005T14A004; 8 pages
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Process Industries; General
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7927-6
  • Copyright © 1987 by ASME


Current technology has yielded engine mountable, compact microprocessor-based recording systems that can record information that will aid in maintenance planning and, thus, yield improved reliability. Among data available are:

1) Trend Recording - revealing deviations from non indicating engine performance deterioration

2) Exceedance Recording - documenting time, date, duration, and severity of exceedances for parameters such as temperature, torque, N1, N2, etc.

3) Power Ratings - power (“hit”) checks are available instantaneously and through the through the exercise of power cycle, go or no-go determination made through real time analysis of current sensor outputs against defined tolerances adjusted to density altitude.

4) Run Data - total time duration within each scale of the operating range for each engine and airframe parameter

5) Cycle Counts - start, power, life fatigue, creep life, and improper cool down cycles are tracked based upon engine manufacturer formulae

These engine recorders primarily utilize the existing engine sensors with no effect on signals to established instrument.

Current technology allows these engine recorders to be universal to many different engines, with limit thresholds entered at the factory through a computer keyboard.

Copyright © 1987 by ASME
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