Reliability Analysis of Aircraft Fuel Closed-loop Control System Based on GO Methodology and Markov Process

doi:10.12382/bgxb.2021.0288

Abstract

Abstract: Aircraft fuel control system is the energy control center of engine. The aircraft fuel control system has an important influence on the flight performance of aircraft. An engine electronic controller is used to control the thrust of engine by adjusting the fuel flow，while the bypass valve is reversed to open to form a closed-loop feedback control system. To enhance the reliability calculation accuracy of the system with closed-loop link，a system reliability calculation method is proposed based on GO (Goal-oriented) methodology. A GO model is established according to the principle diagram of aircraft fuel control system. The state transition matrix of closed-loop link is obtained by using Markov state transition process theory. The steady state probability formula of the closed-loop link is derived for the reliability calculation of a certain aircraft fuel control system. The results show that the proposed method considers the influence of closed-loop feedback signals on the system reliability while not changing the modeling rules of GO methodology，which can more truly reflect the reliability of the aircraft fuel closed-loop control system.

Key words: aircraftfuelclosed-loopcontrolsystem, systemreliabilityanalysis, goal-orientedmethodology, closed-loop, feedbacksignal

CLC Number:

V240.2

LI Jingkui， LIN Wenjie， JIANG Xiuhong， LU Yuze. Reliability Analysis of Aircraft Fuel Closed-loop Control System Based on GO Methodology and Markov Process[J]. Acta Armamentarii, 2022, 43(6): 1447-1455.

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