基于改平策略的全航段起飞越障一体化计算研究

Research on Integrated Calculation of Full-Flight Takeoff Obstacle Clearance Based on Level-Off Strategies

摘要:

现有飞机性能软件在分析起飞越障时，虽能获得障碍物限重，但当需要越过第四航段障碍物时，需要人工决策才能合理评估障碍物限重。通过深入分析 CCAR25 部规章条款的意图，提出一种精准的总、净起飞飞行航迹仿真算法，建立涵盖关键约束项的全航段起飞越障计算模型。通过不同改平策略的整合，实现起飞越障的一体化计算。结果表明：相比传统越障模型，本文所提模型在越障评估中障碍物限重提升可达 24%，为国产民用飞机的高效安全运行提供了更为可靠的保障。

Abstract:

Existing aircraft performance software can determine obstacle weight limits when analyzing takeoff clearance. However, when it comes to clearing obstacles during the fourth segment, manual decision-making is required for a reasonable evaluation of the obstacle weight limit. Grounded in a comprehensive analysis of the intentions behind CCAR25 regulatory clauses, this paper proposes a precise simulation algorithm for gross and net takeoff flight paths and establishes a comprehensive model covering key constraints for full-segment obstacle clearance assessment. This model achieves an integrated calculation of obstacle clearance analysis through different level-off height strategies. Compared to traditional obstacle-clearance models, the simulation results demonstrate a possible enhancement of obstacle-limited takeoff weights by up to 24% in this model"s assessments. This research provides more reliable support for the efficient and safe operation of domestic civil aircraft.