CAJ | 학술논문

针对目前去趋势项所用方法中存在需预先假设趋势项类型、计算复杂等问题，提出了基于平滑先验法(SPA)的被动声信号趋势项消除方法。该方法是一种改进的消除非平稳趋势项算法，通过分析不同规则化参数下 SPA 的截止频率，并结合目标声信号中趋势项频率范围，得出规则化参数取值以达到有效去除待处理信号中趋势项的目的，同时保留感兴趣的模式。对装甲目标声信号仿真分析结果表明，处理前后目标声信号时域波形及 PSD 图谱中趋势项去除效果明显，简单有效地分离了原始数据趋势项和周期项，可用来对雷场中目标声信号进行去趋势项预处理。
침대목전거추세항소용방법중존재수예선가설추세항류형、계산복잡등문제，제출료기우평활선험법(SPA)적피동성신호추세항소제방법。해방법시일충개진적소제비평은추세항산법，통과분석불동규칙화삼수하 SPA 적절지빈솔，병결합목표성신호중추세항빈솔범위，득출규칙화삼수취치이체도유효거제대처리신호중추세항적목적，동시보류감흥취적모식。대장갑목표성신호방진분석결과표명，처리전후목표성신호시역파형급 PSD 도보중추세항거제효과명현，간단유효지분리료원시수거추세항화주기항，가용래대뢰장중목표성신호진행거추세항예처리。
Present methods of trend items removing has to presuppose the type of trend items and have a large calculation amount.Aiming at these problems,a new way of smoothness priors approach (SPA)was proposed in this paper.This method is an improved algorithm in removing non-stationary signal trend items .By analy-zing the cutoff frequency of SPA with different regularization parameter and combining with the frequency range of signal trend items,reasonable value of regularization parameter was pointed out,in the meantime retain the interesting pattern.Simulation analysis of target signal collected from OTC experiment was conducted.The re-sults showed that the trend items in the samples were effectively eliminated view from the time domain waveform and PSD spectrum before and after the treatment,moreover the trend items and periodic items in primary data was simply and effectively separated,the algorithm could be used to eliminate the trend items of the target a-coustic signal in minefield.