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Design of an Improved Hybrid FTC for Faults in Aero-Engine Closed-Loop Control System
International Journal of Aerospace Engineering ( IF 1.4 ) Pub Date : 2021-09-16 , DOI: 10.1155/2021/3553461
Xiaofeng Liu 1 , Chenshuang Luo 1 , Liuqi Xiong 1
Affiliation  

Due to the aero-engines in a high temperature, pressure, and spool speed environment, the concurrent faults in actuator/sensor combined with degradation of the aero-engine could arise the problem of closed-loop instability during the flight. For this purpose, an improved hybrid fault-tolerant control (FTC) technique has been studied in this paper to deal with simultaneous failure of actuators and sensors associated with health parameters of the typical components’ degradation in aero-engines. The improved hybrid FTC structure combined with the nonlinear thermodynamic component-level (NCL) model-based estimation method merges fault estimation of actuators/sensors and typical components’ degradation estimation process into the FTC process. A robust state feedback controller under the disturbance of simultaneous actuator and sensor faults is designed in the proposed method, together with the switching algorithm serving for the fault estimation and improved hybrid FTC channels. In order to show the feasibility of the proposed method, several semiphysical experiments are engaged to illustrate that the improved hybrid FTC structure can save the tolerant-control time and improve performance of the control system.

中文翻译:

一种改进的航空发动机闭环控制系统故障混合FTC设计

由于航空发动机处于高温、高压和阀芯转速环境,执行器/传感器的并发故障与航空发动机的退化相结合,可能会出现飞行过程中的闭环不稳定问题。为此,本文研究了一种改进的混合容错控制 (FTC) 技术,以处理与航空发动机中典型部件退化的健康参数相关的执行器和传感器的同时故障。改进的混合 FTC 结构结合基于非线性热力学组件级 (NCL) 模型的估计方法,将执行器/传感器的故障估计和典型组件的退化估计过程合并到 FTC 过程中。一个健壮的该方法设计了在执行器和传感器同时故障干扰下的状态反馈控制器,以及用于故障估计的切换算法和改进的混合 FTC 通道。为了证明所提出方法的可行性,进行了几个半物理实验来说明改进的混合FTC结构可以节省容控时间并提高控制系统的性能。
更新日期:2021-09-16
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