CAJ | 학술논문

针对激光光幕战斗部破片测速中信号噪声大的问题，提出了基于最小均方(LMS)算法的破片测速信号处理方法。该方法将变步长与变换域结合，变步长 LMS 算法通过合理调整步长因子有效解决了传统 LMS 算法收敛速度和稳态误差之间的矛盾；变换域 LMS 算法通过多尺度小波变换降低输入信号矩阵相关性，提高传统 LMS 算法的收敛速度。仿真验证表明，新算法收敛速度加快35.04%，稳态误差改善27.12%，信噪比差值提高0.72倍，测速精度提高了0.54%。
침대격광광막전두부파편측속중신호조성대적문제，제출료기우최소균방(LMS)산법적파편측속신호처리방법。해방법장변보장여변환역결합，변보장 LMS 산법통과합리조정보장인자유효해결료전통 LMS 산법수렴속도화은태오차지간적모순；변환역 LMS 산법통과다척도소파변환강저수입신호구진상관성，제고전통 LMS 산법적수렴속도。방진험증표명，신산법수렴속도가쾌35.04%，은태오차개선27.12%，신조비차치제고0.72배，측속정도제고료0.54%。
In view of the problems of the big noise in the laser screen warhead fragments velocity testing signal,a method of signal processing based on the least mean square (LMS)algorithm was propose.This method combined with the varia-ble step size and the transform domain .The contradiction between convergence rate and steady-state error of traditional LMS algorithm was effectively solved by variable step size LMS algorithm through adjusting the step size factor reasona-ble.Transform domain LMS algorithm could reduce the correlation of the input signals through multi-scale wavelet trans-form,so the convergence rate would be improved.Simulation results showed that the convergence rate was improved to 35.04% and the steady-state error was improved to 27.12%,the difference between the was improved as 0.72 times as be-fore.The accuracy of the velocity measurement could be improved 0.54 times than the traditional algorithm of LMS.