| 基于遗传算法的航空发动机部件特性修正 |
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| 引用本文： | 潘鹏飞,李秋红,任冰涛,姜殿文. 基于遗传算法的航空发动机部件特性修正[J]. 北京航空航天大学学报, 2014, 40(5): 690-694. DOI: 10.13700/j.bh.1001-5965.2013.0333 |
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| 作者姓名： | 潘鹏飞 李秋红 任冰涛 姜殿文 |
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| 作者单位： | 南京航空航天大学 江苏省航空动力系统重点实验室, 南京 210016 |
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| 基金项目： | 航空科学基金;中央高校基本科研业务费专项;江苏高校优势学科建设工程项目 |
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| 摘 要： | 研究了航空发动机部件特性修正技术，提出了一种基于变适应度函数的模型优化算法，以达到减小总体建模误差，提高模型精度的目的.在稳态模型的基础上，对引气系数、总压恢复系数和各部件的特性进行了修正，使修正后的模型输出与实验数据相一致.采用改进遗传算法，对交叉率和变异率进行了非线性自适应调整，并根据误差大小调整适应度加权系数，避免算法陷入局部最优，同时减小最大建模误差.仿真结果表明，修正后各实验参数平均误差从2.420 8%减小到0.321 7%，模型满足稳态误差小于2%的要求.
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| 关 键 词： | 航空发动机 变适应度 部件特性修正 遗传算法 |
| 收稿时间： | 2013-06-08 |
Component map correction of aero-engine based on genetic algorithm |
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| Affiliation: | Jiangsu Province Key Laboratory of Aerospace Power Systems, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | The components characteristic modification technology was studied. A model optimization algorithm based on changed fitness function was proposed to reduce the modeling error and improve the model accuracy. Based on the static model, characteristic correction coefficients of every component, air-entraining correction coefficients and pressure recovery correction coefficients were optimized to achieve high matching accuracy of engine model outputs to test data. The improved genetic algorithm with adaptive crossover rate and mutation rate was adopted, and the weighting coefficient in fitness function was adjusted according to the error. Then the trapping in local optimal solution was avoided and the maximum modeling error was reduced. Simulation results show that the average error of test parameters decrease from 2.420 8% to 0.321 7% after modification, and the model meets the requirements that the static error should be less than 2%. |
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