| A new method for detecting line spectrum of ship-radiated noise using Duffing oscillator |
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| 作者姓名： | ZHENG SiYi GUO HongXia LI YaAn WANG BingHe ZHANG PengYi |
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| 作者单位： | [1]Department of Communication Engineering, Engineering College of the Chinese People＇s Armed Police Force, Xi＇an 710086 China [2]Department of Basic Science, Engineering College of the Chinese People＇s Armed Police Force, Xi＇an 710086, China [3]College of Marine Engineering, Northwestern Polytechnic University, Xi＇an 710072, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant No, 10474079） and a major project of National Defense Science and Technology （Grant No. 41303080301） |
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| 摘 要： | A detection scheme for line spectrum of ship-radiated noise is proposed using Duffing oscillator. The chaotic trajectory of Duffing oscillator is analyzed and the state equation of the system is improved to detect weak periodic signals in different frequencies. According to the simulation results, the phase transforms of Duffing oscillator are sensitive to periodic signals and immune to the random noise and the periodic interference signals which have larger angular frequency difference from the referential signal. By employing Lyapunov exponents in the field of detection as the criteria for chaos, the phase transforms of dynamic behaviors in quantity are successfully determined. Meanwhile, the threshold value in critical state has been evaluated more accurately. Based on the phase transforms of Duffing oscillator, a new method for detecting line spectrum of ship-radiated noise is given. Three types of ship-radiated noise signals are analyzed and the values of line spectrum are acquired successfully by this method. The experimental results show that this method has high sensitivity and high resolution.
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| 关 键 词： | 光谱 噪声 煤粉震荡器 混沌学说 |
| 收稿时间： | 18 September 2006 |
| 修稿时间： | 2006-09-182007-01-05 |
A new method for detecting line spectrum of ship-radiated noise using duffing oscillator |
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| ZHENG SiYi GUO HongXia LI YaAn WANG BingHe ZHANG PengYi.A new method for detecting line spectrum of ship-radiated noise using Duffing oscillator[J].Chinese Science Bulletin,2007,52(14):1906-1912. |
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| Authors: | Zheng SiYi Guo HongXia Li YaAn Wang BingHe Zhang PengYi |
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| Institution: | (1) Department of Communication Engineering, Engineering College of the Chinese People’s Armed Police Force, Xi’an, 710086, China;(2) Department of Basic Science, Engineering College of the Chinese People’s Armed Police Force, Xi’an, 710086, China;(3) College of Marine Engineering, Northwestern Polytechnic University, Xi’an, 710072, China |
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| Abstract: | A detection scheme for line spectrum of ship-radiated noise is proposed using Duffing oscillator. The chaotic trajectory of Duffing oscillator is analyzed and the state equation of the system is improved to detect weak periodic signals in different frequencies. According to the simulation results, the phase transforms of Duffing oscillator are sensitive to periodic signals and immune to the random noise and the periodic interference signals which have larger angular frequency difference from the referential signal. By employing Lyapunov exponents in the field of detection as the criteria for chaos, the phase transforms of dynamic behaviors in quantity are successfully determined. Meanwhile, the threshold value in critical state has been evaluated more accurately. Based on the phase transforms of Duffing oscillator, a new method for detecting line spectrum of ship-radiated noise is given. Three types of ship-radiated noise signals are analyzed and the values of line spectrum are acquired successfully by this method. The experimental results show that this method has high sensitivity and high resolution. |
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| Keywords: | Duffing oscillator Lyapunov exponents criteria for chaos ship-radiated noise line spectrum |
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