An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission Technique
Effective and accurate diagnosis of engine health is key to ensuring the safe operation of engines. Inlet distortion is due to the flow or the pressure variations. In the paper, an acoustic emission (AE) online monitoring technique, which has a faster response time compared with the ordinary vibrati...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/22/8240 |
| _version_ | 1797547306948493312 |
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| author | Jiaoyan Huang Aiguo Xia Shenao Zou Cong Han Guoan Yang |
| author_facet | Jiaoyan Huang Aiguo Xia Shenao Zou Cong Han Guoan Yang |
| author_sort | Jiaoyan Huang |
| collection | DOAJ |
| description | Effective and accurate diagnosis of engine health is key to ensuring the safe operation of engines. Inlet distortion is due to the flow or the pressure variations. In the paper, an acoustic emission (AE) online monitoring technique, which has a faster response time compared with the ordinary vibration monitoring technique, is used to study the inlet distortion of an engine. The results show that with the deterioration of the inlet distortion, the characteristic parameters of AE signals clearly evolve in three stages. Stage I: when the inlet distortion J ≤ 30%, the characteristic parameters of the AE signal increase as J increases and the amplitude saturates at J = 23%, faster than the other three parameters (the strength, the root mean square (RMS), and the average signal level (ASL)). Stage II: when the inlet distortion 30% < J ≤ 43.64%, all the parameters saturate with only slight fluctuations as J increases and the engine works in an unstable statue. Stage III: when the inlet distortion J > 43.64%, the engine is prone to surge. Furthermore, an intelligent recognition method of the engine inlet distortion based on a unit parameter entropy and the back propagation (BP) neural network is constructed. The recognition accuracy is as high as 97.5%, and this method provides a new approach for engine health management. |
| first_indexed | 2024-03-10T14:42:28Z |
| format | Article |
| id | doaj.art-f40ad6902bab4b1abaf065e4cd85e8d5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:42:28Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-f40ad6902bab4b1abaf065e4cd85e8d52023-11-20T21:42:48ZengMDPI AGApplied Sciences2076-34172020-11-011022824010.3390/app10228240An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission TechniqueJiaoyan Huang0Aiguo Xia1Shenao Zou2Cong Han3Guoan Yang4College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Aeronautical Technology Research Center, Beijing 100076, ChinaTianchen Corporation of China, Tianjin 300400, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaEffective and accurate diagnosis of engine health is key to ensuring the safe operation of engines. Inlet distortion is due to the flow or the pressure variations. In the paper, an acoustic emission (AE) online monitoring technique, which has a faster response time compared with the ordinary vibration monitoring technique, is used to study the inlet distortion of an engine. The results show that with the deterioration of the inlet distortion, the characteristic parameters of AE signals clearly evolve in three stages. Stage I: when the inlet distortion J ≤ 30%, the characteristic parameters of the AE signal increase as J increases and the amplitude saturates at J = 23%, faster than the other three parameters (the strength, the root mean square (RMS), and the average signal level (ASL)). Stage II: when the inlet distortion 30% < J ≤ 43.64%, all the parameters saturate with only slight fluctuations as J increases and the engine works in an unstable statue. Stage III: when the inlet distortion J > 43.64%, the engine is prone to surge. Furthermore, an intelligent recognition method of the engine inlet distortion based on a unit parameter entropy and the back propagation (BP) neural network is constructed. The recognition accuracy is as high as 97.5%, and this method provides a new approach for engine health management.https://www.mdpi.com/2076-3417/10/22/8240acoustic emissioninlet distortionBP neural networkunit parameter entropy |
| spellingShingle | Jiaoyan Huang Aiguo Xia Shenao Zou Cong Han Guoan Yang An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission Technique Applied Sciences acoustic emission inlet distortion BP neural network unit parameter entropy |
| title | An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission Technique |
| title_full | An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission Technique |
| title_fullStr | An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission Technique |
| title_full_unstemmed | An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission Technique |
| title_short | An Efficient Approach for Identification of the Inlet Distortion of Engine Based on Acoustic Emission Technique |
| title_sort | efficient approach for identification of the inlet distortion of engine based on acoustic emission technique |
| topic | acoustic emission inlet distortion BP neural network unit parameter entropy |
| url | https://www.mdpi.com/2076-3417/10/22/8240 |
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