基于改进果蝇算法优化的GRNN航空发动机排气温度预测模型

皮骏; 马圣; 张奇奇; 王力平; 崔东泽

doi:10.13224/j.cnki.jasp.2019.01.002

基于改进果蝇算法优化的GRNN航空发动机排气温度预测模型

doi: 10.13224/j.cnki.jasp.2019.01.002

1.
中国民航大学通用航空学院，天津，300300
2.
中国民航大学航空工程学院，天津，300300
3.
珠海摩天宇航空发动机维修有限公司，广东珠海，519030
4.
中国民航大学中欧航空工程师学院，天津，300300

基金项目: 国家自然科学基金委员会与中国民用航空局联合资助(U1633101)；中央高校基本科研业务费项目中国民航大学专项资助(3122017056)；中国民航大学创业创新项目(201810059121)

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出版历程
- 收稿日期: 2017-12-12
- 刊出日期: 2019-01-28

Aero-engine exhaust gas temperature prediction model based on IFOA-GRNN

摘要

摘要: 利用广义回归神经网络(GRNN)良好的非线性映射能力，对航空发动机排气温度(EGT)进行预测。由于GRNN的预测性能受宽度系数的影响，因此采用改进的果蝇算法优化广义回归神经网络(IFOA-GRNN)，并用优化后的GRNN对航空发动机的EGT进行预测。以某发动机为案例，选取相关参数作为预测模型的输入变量，EGT作为预测模型的输出变量。在相同的样本分配下，将FOA-GRNN(fruit fly optimization algorithm to optimize GRNN)、GRNN、自回归预测模型和优化的支持向量回归机作为对比算法。分析结果表明：IFOA-GRNN的收敛精度高于FOA-GRNN；IFOA-GRNN对EGT预测的平均相对误差为2.47%、拟合优度为0.8506，其预测效果均优于其他对比算法；同时，IFOA-GRNN对噪声的敏感性也低于其他对比算法。
- 航空发动机 /
- 排气温度 /
- 改进的果蝇算法 /
- 广义回归神经网络 /
- 温度预测
Abstract: General regression neural network (GRNN) has a good nonlinear mapping ability.So exhaust gas temperature (EGT) is predicted by GRNN.But, its accuracy of prediction is affected by the width coefficient of GRNN.To address the problem,the GRNN optimized by the improved fruit fly optimization algorithm (IFOA-GRNN) was proposed. And it was used to predict EGT.Taking the engine as an example, some parameters were taken as input variables and EGT taken as output variable of prediction models.The forecast results of IFOA-GRNN, FOA-GRNN(fruit fly optimization algorithm to optimize GRNN), GRNN,auto-regressive and optimized support vector regression were compared under the same training samples and testing samples.The experiment results showed that the convergence accuracy of IFOA-GRNN was higher than FOA-GRNN. Average relative error of IFOA-GRNN for EGT prediction was 2.47%,and the goodness of fit was 0.8506, the prediction effect of IFOA-GRNN was better than other comparison algorithms.And it was more accurate than other methods in the prediction of aero-engine exhaust gas temperature under noisy and no-noise conditions.
- aero-engine /
- exhaust gas temperature /
- improved fruit fly optimization algorithm /
- general regression neural network /
- prediction of temperature

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