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《Journal of Data Acquisition & Processing》 2008-S1
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Weak Period Signal Detection Through Duffing Oscillator by Considering Noise Effect

Wang Yongsheng,Jiang Wenzhi,Liu Lijia,Fan Hongda(Department of Armament Science and Technology,NAEI,Yantai,264001,China)  
The chaos weak signal detection is researched using the computer simulation.The Duffing oscillator system is a nonlinear continuous dynamical system,and the inputting white noise is always the continuous noise.So the inputting stochastic sequence expression is deduced,and it is substituted by the continuous white noise when simulating the continuous system.The effect of the calculational step on the last movement states of Duffing system is analyzed.The reasonable step is discussed for studying the weak signal detection by simulation.After analyzing the inputting noise with different power effects on the system critical state,the relation between the system state and the periodical driver force is researched,and the detecting SNR is estimated by computing the minimum amplitude of the periodical sine signal.Finally,a practical weak signal detection method is presented.
【CateGory Index】: TN911
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