A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration Conditions
Sixty percent of the failures of launch vehicles in the ascending phase occur in the propulsion system. Among them, the vibration generated by the engine is an important factor in the occurrence of failure. At present, health assessment methods in the aerospace field are mostly for specific equipmen...
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| Materiálatiipa: | Artihkal |
| Giella: | English |
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MDPI AG
2023-05-01
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| Ráidu: | Aerospace |
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| Liŋkkat: | https://www.mdpi.com/2226-4310/10/6/505 |
| _version_ | 1827739098892206080 |
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| author | Ruliang Lin Lijing Huang Zhiwen Liu Xuehua Zhou Zhiguo Zhou |
| author_facet | Ruliang Lin Lijing Huang Zhiwen Liu Xuehua Zhou Zhiguo Zhou |
| author_sort | Ruliang Lin |
| collection | DOAJ |
| description | Sixty percent of the failures of launch vehicles in the ascending phase occur in the propulsion system. Among them, the vibration generated by the engine is an important factor in the occurrence of failure. At present, health assessment methods in the aerospace field are mostly for specific equipment, and scholars mostly assess the real-time health status of launch vehicle engines which can only reflect the current health status of the launch vehicle. Existing methods cannot be applied to different equipment, and there is a lack of research on health assessments of fuzzy and complex mechanical systems. In this article, we propose a multi-layer and multi-factor predictive evaluation method for a fuzzy and complex system and conduct experiments on real vibration data of rockets. First, we divide the health assessment level according to the vibration data that affect the normal operation of the rocket. Secondly, we obtain the future trend of vibration signals based on five data prediction methods and calculate the health status interval of the rocket engine’s working conditions based on the boxplot method. At the same time, we calculate the single health evaluation set of every vibration signal. We obtain the weights of each level and factor for the health value based on an analytic hierarchy process (AHP). The optimization of this step avoids an over-reliance on expert experience. Finally, we complete a fuzzy comprehensive evaluation of the engine system from the bottom up to obtain the final health value. The minimum evaluation error is 0.0193% on the test data of the Long March series launch vehicle engine, which shows that the proposed method can successfully predict and evaluate the launch vehicle engine. |
| first_indexed | 2024-03-11T02:54:16Z |
| format | Article |
| id | doaj.art-e4ceced523854692a338d2f839ab71fa |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-11T02:54:16Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-e4ceced523854692a338d2f839ab71fa2023-11-18T08:49:35ZengMDPI AGAerospace2226-43102023-05-0110650510.3390/aerospace10060505A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration ConditionsRuliang Lin0Lijing Huang1Zhiwen Liu2Xuehua Zhou3Zhiguo Zhou4School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, ChinaSixty percent of the failures of launch vehicles in the ascending phase occur in the propulsion system. Among them, the vibration generated by the engine is an important factor in the occurrence of failure. At present, health assessment methods in the aerospace field are mostly for specific equipment, and scholars mostly assess the real-time health status of launch vehicle engines which can only reflect the current health status of the launch vehicle. Existing methods cannot be applied to different equipment, and there is a lack of research on health assessments of fuzzy and complex mechanical systems. In this article, we propose a multi-layer and multi-factor predictive evaluation method for a fuzzy and complex system and conduct experiments on real vibration data of rockets. First, we divide the health assessment level according to the vibration data that affect the normal operation of the rocket. Secondly, we obtain the future trend of vibration signals based on five data prediction methods and calculate the health status interval of the rocket engine’s working conditions based on the boxplot method. At the same time, we calculate the single health evaluation set of every vibration signal. We obtain the weights of each level and factor for the health value based on an analytic hierarchy process (AHP). The optimization of this step avoids an over-reliance on expert experience. Finally, we complete a fuzzy comprehensive evaluation of the engine system from the bottom up to obtain the final health value. The minimum evaluation error is 0.0193% on the test data of the Long March series launch vehicle engine, which shows that the proposed method can successfully predict and evaluate the launch vehicle engine.https://www.mdpi.com/2226-4310/10/6/505launch vehiclevibration signalsequence predictionanalytic hierarchy processfuzzy comprehensive evaluation |
| spellingShingle | Ruliang Lin Lijing Huang Zhiwen Liu Xuehua Zhou Zhiguo Zhou A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration Conditions Aerospace launch vehicle vibration signal sequence prediction analytic hierarchy process fuzzy comprehensive evaluation |
| title | A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration Conditions |
| title_full | A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration Conditions |
| title_fullStr | A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration Conditions |
| title_full_unstemmed | A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration Conditions |
| title_short | A Multilayered and Multifactorial Health Assessment Method for Launch Vehicle Engine under Vibration Conditions |
| title_sort | multilayered and multifactorial health assessment method for launch vehicle engine under vibration conditions |
| topic | launch vehicle vibration signal sequence prediction analytic hierarchy process fuzzy comprehensive evaluation |
| url | https://www.mdpi.com/2226-4310/10/6/505 |
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