Journal Article

Fault diagnosis and location of the aero-engine hydraulic pipeline based on Kalman filter

Liu, Jiren, Zhao, Dazhe, Li, Zhezhu, Gao, Peixin

2017

Overview

The hydraulic pipeline is subject to the aero-engine base excitation and the pump fluid pulsation which can always damage the pipeline through overload to fatigue. So, the health monitoring technique of hydraulic pipeline is essential for the maintenance of the aero-engine. In this article, the Kalman filter combined with fiber Bragg grating method is proposed to detect the location faults of the hydraulic pipeline system. In this method, the description of state equations for the hydraulic pipeline vibration signals are presented based on autoregressive model. Then, a practical strategy detection method is proposed to investigate the vibration signals of hydraulic pipeline based on the Kalman filter technique. Finally, the clamp loosening and the collision faults of the hydraulic pipeline are conducted as an example to validate the proposed approach. The obtained results show that the present technique is convenient and efficient to detect the location faults of hydraulic pipeline where the fiber Bragg grating sensors are fixed, which can serve as an effective guidance for the health monitoring of hydraulic pipeline in aero-engine.

• Publisher: SAGE Publications,Sage Publications Ltd,SAGE Publishing
• Subject: Aerospace engines / Aircraft / Autoregressive models / Bragg gratings / Composite materials / Equations of state / Fault detection / Fault diagnosis / Fault location / Faults / Hydraulics / Kalman filters / Methods / Pipelines / Random variables / Sensors / Structural health monitoring / Vibration