Due to the harsh flight environment, the measured vibration signal of the rocket will be jammed by low frequency trend and noise and the jamming signal will affect the vibration signal analysis seriously. Therefore, an improved method based on empirical mode decomposition (EMD) to eliminate the low frequency trend and noise in vibration signal is proposed. Simulating signal and vibration signal indicate that the method mentioned in this paper can effectively eliminate the low frequency trend and noise signal.%火箭飞行过程中由于受到恶劣环境的影响,对箭体测量得到的振动信号会受到低频趋势项和噪声的干扰,这些干扰信号严重地影响对箭体振动信号的分析.为此,提出基于经验模态分解的改进方法消除振动信号中低频趋势项和噪声干扰;通过仿真信号和火箭振动实测信号验证表明,提出的方法能有效地消除振动信号中的低频趋势项和噪声信号.
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