航空学报 > 2026, Vol. 47 Issue (15): 632797-632797   doi: 10.7527/S1000-6893.2025.32797

航空发动机智能控制与健康管理专栏

面向曲面光滑的部件特性修正改进下赶法

柏兆龙, 刘晓锋()   

  1. 北京航空航天大学 交通科学与工程学院,北京 102206
  • 收稿日期:2025-09-17 修回日期:2025-09-29 接受日期:2025-11-10 出版日期:2025-11-14 发布日期:2025-11-13
  • 通讯作者: 刘晓锋 E-mail:liuxf@buaa.edu.cn
  • 基金资助:
    国家自然科学基金(52372371)

An improved high-to-low method for component characteristics modification towards curved surface smoothness

Zhaolong BAI, Xiaofeng LIU()   

  1. School of Transportations Science and Engineering,Beihang University,Beijing 102206,China
  • Received:2025-09-17 Revised:2025-09-29 Accepted:2025-11-10 Online:2025-11-14 Published:2025-11-13
  • Contact: Xiaofeng LIU E-mail:liuxf@buaa.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52372371)

摘要:

高精度的航空发动机数字模型依赖于高匹配度的部件特性数据。针对传统下赶法修正结果不唯一、曲面不光滑等问题,提出了一种基于改进下赶法的部件特性修正方法。该方法首先通过缩放基准点进行初步缩放修正,确保设计点的高精度及工况的覆盖性;随后,采用粒子群算法优化由发动机目标参数构建的适应度函数,以获取不同工况下的最优部件修正系数。在部件特性图上补充对应工况特性线,并基于修正系数对补充与原始特性线进行缩放,最终得到全工况匹配且曲面连续光滑的特性数据。以某型双轴混排发动机为研究对象,开展了所提方法与传统下赶法的对比仿真验证。结果表明,改进方法修正后的发动机目标参数仿真相对误差均小于1%,整体精度优于传统下赶法,并且有效消除了修正结果的不光滑现象。

关键词: 航空发动机, 部件特性修正, 部件级模型, 粒子群优化, 非设计点匹配

Abstract:

High-precision aeroengine digital models require well-matched component characteristics data. An improved component characteristics modification method is proposed to address the non-unique results and non-smooth curved surfaces from the traditional high-to-low method. Preliminary scaling modification is carried out through reference points to ensure high accuracy at design point and broad coverage across all operation points. Fitness function constructed from target parameters is optimized by using particle swarm optimization algorithm to determine optimal component correction coefficients for all operation points. Component characteristic maps are expanded by adding characteristic lines corresponding to these conditions. Both the expanded and original lines are scaled using the obtained coefficients, resulting in a fully-matched and continuously smooth characteristic curved surface. A comparative simulation between the improved method and traditional method was conducted on a two-spool mixed-flow engine. The simulation results demonstrate that all the relative errors of the target parameters corrected by the improved method are less than 1%, outperforming the tradition method in overall accuracy while successfully avoiding non-smooth correction results.

Key words: aeroengine, component characteristics modification, component level model, particle swarm optimization, off-design point matching

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