| 船舶电力负荷混沌信号小波奇异点检测与降噪 |
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| 引用本文： | 赵敏,樊印海,徐伟中. 船舶电力负荷混沌信号小波奇异点检测与降噪[J]. 辽宁工程技术大学学报(自然科学版), 2008, 27(5) |
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| 作者姓名： | 赵敏 樊印海 徐伟中 |
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| 作者单位： | 大连海事大学,自动化与电气工程学院,辽宁,大连,116026;沈阳工程学院电气工程系,辽宁,沈阳,110136;大连海事大学,自动化与电气工程学院,辽宁,大连,116026;国电吉林热电厂,吉林,132021 |
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| 基金项目： | 国家重大技术装备研制基金 |
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| 摘 要： | 为提高电力推进船舶电力负荷数据精度,提出基于分形的电力推进船舶电力负荷混沌信号小波奇异点检测与降噪.将含有噪声的电力推进船舶电力负荷混沌信号不进行小波反变换,采用计算量小,收敛速度快的二进小波模极大值解析迭代法重构信号,求出其重构信号的分形维数.根据所计算的分形维数判断是否有突变信号以及确定其发生的时刻,同时依据分形维数控制小波软阈值降噪的层次及其阈值,达到电力推进船舶电力负荷混沌信号与其噪声的自适应分离.以实际船舶电力负荷混沌信号为例进行计算,证明该方法能准确检测到奇异信号,并能实现电力推进船舶电力负荷混沌信号与其噪声的有效分离.
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| 关 键 词： | 分形 电力推进船舶 电力负荷 混沌 小波 |
Singular spots detection and de-noising of electronic propulsion ship power load chaotic signal using wavelet method |
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| ZHAO Min,FAN Yinhai,XU Weizhong. Singular spots detection and de-noising of electronic propulsion ship power load chaotic signal using wavelet method[J]. Journal of Liaoning Technical University (Natural Science Edition), 2008, 27(5) |
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| Authors: | ZHAO Min FAN Yinhai XU Weizhong |
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| Affiliation: | ZHAO Min1,2,FAN Yinhai1,XU Weizhong3(1.College of Automation , Electrical Engineering,DaLian Maritime University,DaLian 116026,China 2.Department of Electrical Engineering,Shenyang Institute of Engineering,Shenyang 110136,China,3.GuoDian JiLin Thermoelectric Power Plant,Jilin,132021,China) |
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| Abstract: | To raise the accuracy of ship power load data,wavelet analysis method is used to detect singular spots and reduce noise based on fractal.The electronic propulsion ship power load chaotic signal within noise needs not process the inverse wavelet transform.It is reconfigured based on an analytic iterative algorithm,which has the small computation and the fast convergence.Then the fractal dimension of reconfiguration signal can be calculated and can be used to detect the singular spots and control the threshol... |
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| Keywords: | fractal electric propulsion ship power load chaos wavelet |
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