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Safety Analysis for Icing Aircraft during Landing Phase Based on Reachability Analysis

机译：基于可达性分析的降落飞机结冰飞机安全性分析

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摘要

Icing is one of the leading causes of fatal aircraft accidents worldwide. Encountering icing conditions, dynamic characteristics of the aircraft will be damaged, thereby greatly affecting flight safety. Research on real-time estimations of the safety envelope under icing conditions is critical to improve flight safety. In order to determine the safety envelope, the reachability analysis based on the level set method is presented. The reachable set is obtained via computing the Hamilton-Jacobi partial differential equation (HJPDE), which is based on optimal control and is used in the landing phase of an aircraft. The results show that icing will shrink the safety envelope. Particularly under severe icing conditions, the stall speed of the aircraft will increase, and dynamic behavior will be more sensitive. A slight change of command by the pilot may contribute to the flight state moving outside the safety envelope. Furthermore, the effect of flap deflection was considered, which positively impacts the expanding safety envelope during the landing phase. Finally, a maneuvering coping strategy based on safety envelope is proposed. Examples are provided using the NASA's generic transport model (GTM), and the results can be applied to flight safety risk assessment, providing theoretical guidance for the design of envelope protection systems.
机译：结冰是全球致命飞机事故的主要原因之一。遇到结冰情况，飞机的动力特性将受到破坏，从而极大地影响飞行安全。对结冰条件下安全包线的实时估计进行研究对于提高飞行安全至关重要。为了确定安全范围，提出了基于水平集方法的可达性分析。可达集是通过计算汉密尔顿-雅各比偏微分方程（HJPDE）获得的，该方程基于最佳控制，并用于飞机着陆阶段。结果表明，结冰将缩小安全范围。特别是在严酷的结冰条件下，飞机的失速速度将增加，动态行为将更加敏感。飞行员的命令略有改变可能会导致飞行状态移至安全范围之外。此外，还考虑了襟翼偏斜的影响，这在着陆阶段对扩大的安全范围产生了积极影响。最后，提出了一种基于安全包络的机动应对策略。使用NASA的通用运输模型（GTM）提供了示例，这些结果可以应用于飞行安全风险评估，为包络保护系统的设计提供理论指导。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第14期|3728241.1-3728241.10|共10页
  • 作者

    Zhou Chi; Li Yinghui; Zheng Wuji; Wu Pengwei; Dong Zehong;

  • 作者单位

    Air Force Engn Univ, Aeronaut Engn Coll, Xian 710038, Shaanxi, Peoples R China;

    Air Force Engn Univ, Aeronaut Engn Coll, Xian 710038, Shaanxi, Peoples R China;

    Air Force Engn Univ, Aeronaut Engn Coll, Xian 710038, Shaanxi, Peoples R China;

    Air Force Engn Univ, Aeronaut Engn Coll, Xian 710038, Shaanxi, Peoples R China;

    Air Force Engn Univ, Aeronaut Engn Coll, Xian 710038, Shaanxi, Peoples R China;

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