基于参数优化的广义S变换在提取地震信号瞬时参数中的应用

英文篇名：Application on the Extracting of the Instantaneous Parameters Based on the Parameter Optimization of the Generalized S Transformation
中文刊名：自动化技术与应用
英文刊名：Techniques of Automation and Applications
作者：刘霞 ; 马妍 ; 闫鸿娟 ; 姚建红
英文作者：LIU Xia1 ; MA Yan1 ; YAN Hong-juan2 ; YAO Jian-hong1(1.Northeast Petroleum University ; Daqing 163318 China ; 2.PetrolChina Daqing Refining & Petrochemical Company ; Daqing 163000 China)
中文关键词：广义S变换 ; 参数优化 ; 瞬时参数
英文关键词：generalized S transform ; parameter optimization ; instantaneous parameters
出版日期：2013-03-25
机构：东北石油大学;中石油大庆炼化公司;
年：2013
期：03
出版单位：自动化技术与应用

摘要

地震信号的瞬时参数因包含丰富的地下地质信息,是地震资料分析的重要工具,因此提取瞬时参数具有很重要的意义。由于传统的各种时频方法在高频处没有较好的时频聚焦性,其能量分布曲线发生畸变导致提取的瞬时参数存在较大的误差,为了解决此问题,本文在广义S变换的基础上,提出了一种优化可控参数的算法,通过用广义S变换方法将信号变换到时频域,结合时频聚焦性准则选取广义S变换窗函数最优化的参数值,使经过优化后的广义S变换在各个频率处具有较好时频分辨率的同时达到最好的时频聚焦性。通过matlab对合成地震信号和实际地震信号仿真表明,该方法提高了信号整体的时频聚焦性,能够更精确的提取瞬时参数,具有具有较高的实用性和灵活性。
The instantaneous parameters of seismic signal contains the rich underground geological information,it also is an important tool in the analysis of the seismic data,so how to extract instantaneous parameters has very important significance.Because of the worse time-frequency focus on high frequency and the distortion of energy distribution curve,the traditional time-frequcncy methods exist a great error on extracting instantaneous parameters.To solve this problem,this article puts forward a controllable parameter optimization algorithm based on the generalized S transform.According to the measurement criteria of the time-frequency aggregation,the best time-frequency resolution and focus on each frequency are obtained.The matlab simulation results show that the method improves the time-frequency focus and has the good rusult in the extraction of the seismic signal instantaneous parameters.It has higher practicability and adaptability.

引文

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