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| Three Dimensional Chaotic Weak Signal Detection System with cos Function and its Circuit Implementation |
| LIU Jian-ming |
| College of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract The output wave changes between periodic and chaotic state of the variable in the two dimensional Duffing chaotic weak signal detection system were analysed. A new rule to generate the three dimensional chaotic weak signal detection system was discoveried. Making the three-dimensional Liu-cos chaotic weak signal detection system generated by above the rule as one of the four detection systems for an example, the wide convergence of the output signals of the three-dimensional chaotic weak signal detection system generated by the rule was verified by using the Fourier transform theoretical. The problems for the signal can not be detection in the wide area and can not be convergence by the two dimensional Duffing chaotic weak signal detection system were solved. The experiments in air showed that the low-frequency acoustic interference can be overcome by the new designed three-dimensional Liu-cos chaotic weak signal detection circuit. The detection performances of desigened three-dimensional Liu-cos chaotic weak signal detection circuit are better than the two dimensional Duffing circuit as well as the new designed Duffing and Filter circuits. The experiments in water showed that the high frequency acoustic interference can be overcome and the distorted acoustic signal can be detected by the three-dimensional Liu-cos chaotic weak signal detection circuit.
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Received: 28 February 2018
Published: 07 March 2019
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2019, Vol. 40 
