中文摘要：

为散发轮船的噪音的线状光谱的一个察觉计划用未击中振荡器被建议。未击中振荡器的 Thechaotic 轨道被分析，系统的州的方程被改进在不同频率检测弱周期的信号。根据模拟结果，未击中振荡器的阶段变换对周期的信号和免疫者敏感到噪音和周期的干扰表明从参考信号有更大的尖频率差别的随机。由在察觉著名计算机生产厂商的地里采用 Lyapunov 代表他为混乱的标准，在数量的动态行为的阶段变换成功地被决定。同时，在临界态的阀值价值更精确地被评估了。基于 Duffingoscillator 的阶段变换，为检测散发 ofship 的噪音被给的线状光谱的一个新方法。散发 ofship 的噪音表明的三种类型被分析，线状光谱的价值被这个方法成功地获得。试验性的结果证明这个方法有高敏感和高分辨率。

英文摘要：

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.