The aircraft sudden failure is a kind of random faults, which is a serious threat for the safe. To present the law of the aircraft sudden failure, this paper proposes to analyze and disclose the mechanism, the feature and procedure of the aircraft sudden failure evolution by dissipative structure theory. Based on that, it models the sudden failure evolution model on aircraft via time varying entropy and time varying frequency band energy distribution, and then it simulates the model by the surge of aero-engine. The results suggest that the entropy and the frequency band energy distribution of the dissipative structure are useful to present the procedure and the feature of the aircraft sudden failure evolution.%飞行器突发故障是一种随机故障,常对飞行器的安全飞行造成严重威胁.为认识和揭示飞行器突发故障的演化规律,提出利用耗散结构理论对飞行器突发故障的演化机理、演化过程及演化特征进行分析和研究,根据时变熵和时变频带能量分布建立飞行器突发故障演化模型,并以飞机发动机喘振为例进行仿真验证.结果表明,耗散结构熵值的变化和时变频带能量的波动,能够反映飞行器突发故障的演化过程和演化特征.
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