数字化谱仪系统极点识别算法应用与系统仿真  

Application of Poles Identification in the Digital Spectroscopy and the System Simulation

作　　者：陈亮[1] 魏义祥[1] 肖无云[1] 

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《核电子学与探测技术》2008年第1期166-169,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(10675073)资助

摘　　要：本文介绍了数字化谱仪系统中,由前放和成形滤波器组成的模拟系统极点数字化识别算法,基于这种算法在Matlab及Simulink平台上对数字化谱仪系统进行了模拟,特别对数字滤波部分进行了建模仿真。主要分析了噪声、鬼零点(ghost zero)、时间常数等因素对算法的影响,讨论了算法在实际中的应用。这种算法基于Hankel矩阵的奇异值分解,具有精确、实时运行、数值稳定、无需初始化等特点,因此具有广泛的应用价值。This paper presents a digital method for the poles identification of an analog system consisting of a preamplifier and a shaping filter in the digital spectroscopy. Based on this method, the result of the simulation of the analog and digital system is modeled in the Matlab and Simulink platform. The influence of noise, the “ghost zero” and some realization problem is also discussed. The algorithm is based on SVD of the Hankel. With the advantage of accuracy, operating in real-time, numerical stability and requiring no initialization, the method is widely used.

关 键 词：数字化谱仪 极点识别 4SID算法 Madab仿真 

分 类 号：TL822.6[核科学技术—核技术及应用]