CAJ | 학술논문

针对经验模态分解中存在的端点效应及模态混叠现象，提出一种新的改进方法。利用镜像延拓方法对信号两端数据进行延拓后，结合余弦窗函数以解决端点效应对分解结果的影响，再利用高频谐波法结合掩膜信号法抑制EMD分解过程中存在的模态混叠。通过实验对比验证了该方法的有效可行性。
침대경험모태분해중존재적단점효응급모태혼첩현상，제출일충신적개진방법。이용경상연탁방법대신호량단수거진행연탁후，결합여현창함수이해결단점효응대분해결과적영향，재이용고빈해파법결합엄막신호법억제EMD분해과정중존재적모태혼첩。통과실험대비험증료해방법적유효가행성。
Aiming at avoiding the existing problem of end effects and mode mixing in empirical mode decomposition, a new method is proposed. By using the method of mirror image extending to extend the signal data at both ends, then pro-cessing by cosine window function, the influence of end effects on decomposition results is solved. Using the method of high-frequency harmonics, it combines with the masking signal to inhibit the mode mixing of empirical mode decomposi-tion. Simulation results indicate that the new method is effective and feasible.