Robust Fault Diagnosis for Fixed Wing Aircraft Fault Tolerant Flight Control System
R. Jaganraj1, R. Velu2
1R. Jaganraj, Department of Aeronautical Engineering, Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology, Chennai (Tamil Nadu), India.
2R. Velu, Department of Mechanical Engineering, Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology, Chennai (Tamil Nadu), India.
Manuscript received on 01 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript published on 30 May 2019 | PP: 2008-2013 | Volume-8 Issue-7, May 2019 | Retrieval Number: G6260058719/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Fault Tolerant Flight Control (FTFC) system and Fault Detection and Identification system (FDI) are used to isolate the aircraft fault and recover its operation during the fault occurrence. FTFC and FDI uses either actuator feedback or desired performance monitoring method to estimate fault source. These methods are limited with the fault source identification. FTFC and FDI have limitation in identification of the fault source. FTFC and FDI needs to be revisited with respect to the identification of fault source. This paper presents the design and implementation of FTFC based on a robust model reference fault detection and identification system (MRFDI) for fixed-wing aircraft. The proposed method demonstrates the identification of actuator fault, measurement error in instrument and presence of uncontrolled disturbance. The proposed method combines the actuator feedback with aircraft parameter to distinguish faults in actuator, instrument and deviation due to uncontrolled motion of the aircraft. A typical aircraft mathematical model of the aircraft is simulated with developed FTFC embedded with MRFDI. The fault is injected to simulate actuator fault, feedback instrument fault and uncontrolled motion to observe the performance of FTFC. Results reveals that proposed FTFC method is distinguishing different fault sources among them and recovering aircraft from fault occurrence.
Keyword: Model Reference Fault Detection and Identification System, Fault Tolerant Flight Control, Fault Classification.
Scope of the Article: Robotics and Control.