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| Prediction of Vibration Environment of Helicopter Platforms and Design Method of Vibration Environmental Spectrum |
| Received:February 20, 2025 Revised:March 13, 2025 |
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| DOI：10.7643/issn.1672-9242.2025.04.009 |
| KeyWord:helicopter periodic signal principal component analysis statistical induction analysis and prediction vibration environmental spectrum |
| Author | Institution |
| CHEN Xueqing |
China Aviation Comprehensive Technology Research Institute, Beijing , China |
| LIU Yu |
China Ordnance Industrial Standardization Research Institute, Beijing , China |
| HE Qiongyao |
Southwest Institute of Technology Engineering, Chongqing , China |
| WU Yao |
Southwest Institute of Technology Engineering, Chongqing , China |
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| Abstract: |
| The work aims to analyze and predict the vibration environment of the helicopter, and design the vibration environmental spectrum of the helicopter platform based on the measured vibration environmental data of the helicopter platform. Based on the characteristic that helicopter vibration was composed of the superposition of broadband random vibration and periodic vibration components, the periodic signals were identified and separated, and a periodic amplitude prediction method based on principal component analysis was proposed. On this basis, statistical induction, analysis and prediction were carried out for the periodic signal and the random signal respectively, and then the vibration environmental spectrum was synthesized. This method was used to process the vibration data of the helicopter platform to obtain the vibration environment spectrum of the helicopter platform. It constructs a new paradigm for helicopter vibration spectrum design, achieving a breakthrough in the design method of helicopter environmental conditions. |
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