电动飞机锂电池振动适航测试研究

Research on Vibration Airworthiness Test of Electric Aircraft Lithium Battery

为保证新能源电动飞机飞行的安全性和可靠性,需对其动力电池组进行振动测试试验,以满足适航要求。采用时域分析、频域分析相结合的方法,分析总结了所选电池组在电动飞机运行过程中不同工况下、不同特定方向上的振动强弱。其中时域信号加速度峰值和均方根峰值分别为3.38g和1.46g,频域信号功率谱密度在X、Y、Z轴上的峰值分别为19.0e^(-3)g^(2)/Hz、83.8e^(-3)g^(2)/Hz、19.6e^(-3)g^(2)/Hz。根据电池组实际振动环境的测试数据,结合RTCA-DO-311适航标准和RTCADO-160F测试程序振动部分,设计并完成了锐翔电动飞机动力电池组的振动测试,测试结果各项达标,满足修改后的测试规范要求,并且验证了所设计的方法的正确性和可行性。

In order to ensure the safety and reliability of the flight of new energy electric aircrafts,vibration test tests of their power battery packs are required to meet airworthiness requirements.Using a combination of time domain analysis and frequency domain analysis,the vibration strength of the selected battery pack under different operating conditions and in different specific directions during the operation of the electric aircraft is analyzed and summarized.The time domain signal acceleration peak and rms peak are 3.38g and 1.46g,and the frequency domain signal power spectral density peaks on the X,Y,and Z axes are 19.0e^(-3)g^(2)/Hz,83.8e^(-3)g^(2)/Hz,19.6e^(-3)g^(2)/Hz.According to the test data of the actual vibration environment of the battery pack,combined with the RTCA-DO-311 airworthiness standard and the vibration part of the RTCA-DO-160F test program,the vibration test of the power battery pack of RuiXiang electric aircraft was designed and completed.The test results meet the requirements of the revised test specification and verify the correctness and feasibility of the designed method.