基于最优波形的脉冲梯形成形研究  

Study on Pulse Trapezoid Shaping Based on Optimal Waveform

作　　者：母鹏程 黄博睿 钟承霖 黄洪全[1] 蒋开明[1] 沈志文 刘江 MU Pengcheng;HUANG Borui;ZHONG Chenglin;HUANG Hongquan;JIANG Kaiming;SHEN Zhiwen;LIU Jiang(College of Nuclear Technology and Automation Engineer,Chengdu University of Technology,Chengdu 610059,China;Northeastern University,Qinhuangdao 066004,China)

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059 [2]东北大学,秦皇岛066004

出　　处：《核电子学与探测技术》2023年第6期1195-1200,共6页Nuclear Electronics & Detection Technology

基　　金：国家自然科学区域创新发展联合基金(U19A2080);四川省科技计划项目(2021YJ0325);成都理工大学教改项目(11100-000113-22068)。

摘　　要：前端模拟系统输出的核脉冲信号由于波形的复杂性,其数学模型往往难以用准确的单(或多)指数等典型形式进行描述,使脉冲的梯形成形算法的递推难以实现或者成形后的梯形信号发生畸变。为此,提出了一种前端模拟系统的最优化辨识方法。将前端模拟系统输出的各脉冲进行归一化后利用聚类算法对各脉冲进行处理,确定初步最优波形的序列值及其目标函数,利用模拟退火算法的全局寻优能力搜索最优波形,再基于最优波形求取梯形成形的递推算法。实验结果表明,该方案克服了脉冲波形的复杂性和波动性,使梯形成形算法更为准确、一致及可靠,使脉冲幅度辨识精度得到大幅提高,为后续能谱的准确获取提供了保障。The nuclear pulse output of the front-end simulation system has waveform complexity,its mathematical model is often difficult to be described by a typical form such as accurate single(or multiple)index,which leads to the difficulty of recursion of pulse trapezoidal forming algorithm or distortion of trapezoidal signal after forming,therefore,this paper proposes a front-end analog system optimization identification method.The pulse output of the front-end simulation system is normalized and processed by clustering algorithm to determine the sequence value of the preliminary optimal waveform and its objective function.The global optimization ability of simulated annealing algorithm is used to search the optimal waveform,and then the recursive method of trapezoidal forming is obtained based on the global optimal waveform.The experimental results show that the proposed scheme overcomes the complexity and fluctuation of pulse waveform,makes the trapezoidal forming algorithm more accurate,consistent and reliable,and greatly improves the accuracy of pulse amplitude identification,which provides a guarantee for the accurate acquisition of subsequent energy spectrum.

关 键 词：核脉冲 最优波形 聚类算法 模拟退火算法 梯形成形 

分 类 号：TL82[核科学技术—核技术及应用] TN782[电子电信—电路与系统]