基于经验模态分解的子母战斗部抛撒过载分析

摘要

介绍了经验模态分解方法的原理内容，该方法具有对非平稳信号分析的高效性和自适应性的特点。子母战斗部抛撒过载信号为复杂的瞬态非平稳随机振动信号，利用EMD方法对某子母战斗部抛撒过载测试信号进行分析与处理。研究结果表明， EMD能较好地按不同的时间尺度对信号进行分解，分解后的固有模态函数能反应信号本身所固有的特性。%The EMD method is relatively high efifciency and adaptive on non-stationary signal analysis. Signals received due to ejecting overload of cluster warhead are complicated, instant and non-stationary signals. An analysis of those signals are conducted and evaluated by carrying out EMD. The outcome shows that EMD is able to decompose signals in accordance with different time intervals, the resulting intrinsic mode function can explain the inherent characters of the tested signal .