%A Jie HANG, Yunhua LI, Liman YANG %T Active fault tolerant control of fuel control system of aeroengine afterburner %0 Journal Article %D 2023 %J Acta Aeronautica et Astronautica Sinica %R 10.7527/S1000-6893.2022.28063 %P 328063-328063 %V 44 %N 14 %U {https://hkxb.buaa.edu.cn/CN/abstract/article_19440.shtml} %8 2023-07-25 %X

To improve the fault tolerance and reliability of the fuel control system of the aeroengine afterburner, a novel Adaptive Integral Robust Fault Tolerant Control (AIRFTC) strategy is proposed for the Fuel Metering Unit (FMU) with unmatched disturbances, sensor faults and internal leakage faults. The proposed Nonlinear Unknown Input Observer (NUIO) based on adaptive parameter estimation can effectively estimate the system state and sensor fault, while not moderated by unmatched disturbances and internal leakage faults. The introduced filter error function combines the integral robust control with adaptive control to address internal leakage faults with sensor noise and unmatched disturbances. By Lyapunov method, we can prove that the displacement of FMU can track reference signal asymptotically. The simulation results show that the control performances of AIRFTC are as low as 0.035 6, 0.001 8, 0.013 6, 25.197 3, 4×10-4 mm in terms of maximum tracking error, the average tracking error, the standard value of tracking error, ITAE, and ITSE, respectively. This paper can provide a novel method and glimpse for aeroengine health management.