摘要
介绍了直接使用双线性变换把模拟系统的传递函数转换为离散系统的传递函数,构造出由宽带数字地震记录,仿真出传统模拟地震仪器记录波形的递归滤波器的方法,从而使在线实时波形仿真成为可能。并通过比较利用实际宽带数字地震记录,分别采用频域仿真和本文算法构造的仿真滤波器仿真得到的波形,验证了本文算法的正确性。
A method for constructing real time seismic waveform filter by directly transforming continuous transfer function into discrete field transfer function with bilinear transformation is introduced in this paper. Waveform of traditional seismograph may be gotten from digital broadband seismic record in real time with this filter. The validity of the filter is verified by comparing the output waveforms both from the filter and an emulation algorithm in frequency domain.
出处
《地震地磁观测与研究》
2006年第1期68-73,共6页
Seismological and Geomagnetic Observation and Research
基金
国家重点基础研究发展项目
项目号2001CB711005-1
关键词
传递函数
实时波形仿真
双线性变换
递归滤波
transfer function, real time emulation of waveform, bilinear transformation, infinite impulse response filter
