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中文摘要：
仪表着陆系统是飞机导航系统的重要子系统,其可靠性直接关系到飞机能否安全运行。为了准确描述故障对仪表着陆系统功能的影响程度,文中基于对仪表着陆系统接收机故障概率的分析,将模糊数学和故障树方法相结合,以AIR-BUS 320仪表着陆系统接收机为例,详述了模糊故障树的建模过程,并通过对其进行失效分析,给出了仪表着陆系统接收机的故障诊断算法。仿真结果表明,所建立的模型满足仪表着陆系统对接收机的故障诊断要求,且建模方法具有广泛的适用性。
英文摘要：
Instrument landing system is an important sub-aircraft navigation system,the reliability of which influences the safety of aircraft directly.In order to accurately describe the effect of fault on ILS,it combines fuzzy math and faulty tree based on the analysis of receivers＇ failure probability.Taking the AIRBUS 320 ILS receiver as example,the modeling procedure of fuzzy fault tree is detailed,and the fault diagnonsis algorithm of ILS receiver is presented by failure analysis.The simulation results show that this method is effective to diagnose the fault of the instrument landing system,and the proposed method is widely applicable.
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