MEMS based dynamic pressure sensor for gas turbine engine health management


  1. Rinaldi, G.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
The miniaturization of sensors represents a promising approach for gas turbine engine (GTE) health management. The main advantages of miniaturized systems include low mass and low power consumption. Micro-electro-mechanical-systems (MEMS) based sensor systems will play a significant role in the development of miniature, on-line, in-situ, low cost, GTE health monitoring platforms. Derived from semiconductor and integrated-circuit microfabrication processes, it is expected that MEMS based sensors will replace existing macro-sensors for GTE environments. In this regard, dynamic pressure measurements are a versatile approach for obtaining engine performance characteristics for GTEs, particularly as MEMS sensors provide high sensitivity with small size that enables in-situ monitoring of pressure flows. In this paper, a MEMS based dynamic pressure sensor is presented in which dynamic pressure flow of a GTE is measured acoustically in order to demonstrate the sensor’s capability to monitor engine fan speed, fan blade condition and engine surge. Preliminary in-laboratory tests conducted on DC axial fans demonstrate excellent results when employing this method to measure fan speed, fan blade condition and surge. The final aim of this work is to employ the proposed MEMS based sensor on an actual GTE on a test rig to measure the engine RPM and fan blade condition.

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Report Number
DRDC-ATLANTIC-TM-2009-142 — Technical Memorandum
Date of publication
01 Oct 2009
Number of Pages
Electronic Document(PDF)

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