航空发动机高精度高效温度畸变测试技术研究

Research on High Precision and Efficiency Temperature Distortion Testing Technology of Aeroengines

中文关键词:  航空发动机  温度畸变  热电偶  高精度  高效率

英文关键词:aeroengine  temperature distortion  thermocouple  high precision  high efficiency

中文摘要:

      为了提高航空发动机温度畸变测试精度与测试效率，设计了一套小惯性细丝热电偶测试条件下的航空发动机温度畸变测试方案，并在此基础上开展了温度畸变动态误差修正方法和测试坏点的软件修复算法研究。研究了原始温度信号信噪比对修正后信号误差的影响，提出了不同信噪比情况下动态误差的修正方法，保证了畸变温度数据在动态修正后，稳态相对误差在2%以内。考虑到空间维度，在一定的修复准则下，提出了测试坏点的软件修复算法，修复算法在保证温度畸变指数具备较高测试精度的同时提高了测试效率。经过大量的真实环境下的航空发动机温度畸变测试数据的验证，结果表明，温度畸变动态误差修正方法和测试坏点的软件修复算法是可行的，可在保证高精度测试的基础上确保温度畸变测试试验的高效进行。

英文摘要:

      In order to improve the precision and efficiency of aeroengine temperature distortion test,an aeroengine temperature distortion test scheme for small inertial fine-wire thermocouple test conditions is designed.On this basis,the dynamic error correction method of temperature distortion and the software repair algorithm of failure data are studied.The influence of the signal-to-noise ratio of the original temperature signal on the corrected signal error is studied,and the dynamic error correction method under different signal-to-noise ratios is proposed,which ensures that the steady-state relative error of the distorted temperature data is less than 2% after dynamic correction.Considering the spatial dimension,under certain repair criteria,a software repair algorithm for testing failure data is proposed.The repair algorithm not only ensures the high test accuracy of temperature distortion index,but also improves the test efficiency.After verifying a large amount of aeroengine temperature distortion test data in the real environment,the results show that the dynamic error correction method of temperature distortion and the software repair algorithm of failure data are feasible,and the temperature distortion test can be carried out efficiently on the basis of ensuring high precision test.