CAJ | 학술논문

针对侵彻加速度信号的零漂特征，采用小波分析法处理零漂数据，提出以小波基函数提取趋势项的准确度和信号重构能力作为最优小波基的选择依据。研究表明：零漂信号的频率范围主要集中在100 Hz以内；bior2.8小波基提取趋势项准确度较高，重构侵彻加速度信号的误差最小。含有零漂的侵彻加速度信号采用bior2.8最优小波基分解出100 Hz以下的低频趋势项，能够有效地消除零漂，得到的加速度一次积分与二次积分分别与实际的侵彻速度和侵彻行程保持了较好的一致性，行程相对误差小于10%。消除零漂后的加速度信号可以为计行程自适应起爆方式提供有效信息。
침대침철가속도신호적령표특정，채용소파분석법처리령표수거，제출이소파기함수제취추세항적준학도화신호중구능력작위최우소파기적선택의거。연구표명：령표신호적빈솔범위주요집중재100 Hz이내；bior2.8소파기제취추세항준학도교고，중구침철가속도신호적오차최소。함유령표적침철가속도신호채용bior2.8최우소파기분해출100 Hz이하적저빈추세항，능구유효지소제령표，득도적가속도일차적분여이차적분분별여실제적침철속도화침철행정보지료교호적일치성，행정상대오차소우10%。소제령표후적가속도신호가이위계행정자괄응기폭방식제공유효신식。
By studying the zero drift characteristic of the penetration acceleration signal,the wavelet analysis method is used to process zero drift data. The accuracy of the trend item extracted by wavelet basis function and the ability of signal reconstruction are proposed as the selection basis of the optimal wavelet base. The study indicates that the frequency of the zero drift signal ranges mainly within 100 Hz;The accuracy of the trend item extracted by the wave-let base bior2.8 is better,and the error of reconstruction penetration acceleration signal is minimal. The penetration acceleration signal with zero drift used the optimal wavelet base bior2.8 to factorize low-frequency trend term under 100Hz,which can remove the zero drift efficiently. The single integral and double integral of acceleration corrected are consistent with the actual striking velocity and the penetration distance respectively. The relative error of dis-tance is less than 10%. The acceleration signal without zero drift can provide effective information for the detonating-control technique of calculating penetration distance.