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双稳态随机共振系统参数选择快速算法及应用

DOI: doi:10.3969/j.issn.1006-7043.2011.03.003

Keywords: 随机共振, 双稳态, 线谱检测, 龙格库塔算法

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Abstract:

针对双稳态随机共振(SR)系统参数选择困难的问题,提出了基于龙格库塔数值算法的随机共振参数选择快速算法,并将其应用于目标线谱检测.首先对双稳态SR系统进行参数归一化,在此基础上提出了由输入信噪比来选择系统步长,并根据归一化频率和谐波估计幅值和来计算SR系统参数的参数选择快速算法.该算法能够对不满足绝热条件下的高频或大尺度离散信号进行处理,快速选择SR系统的系统参数,并根据龙格库塔数值算法求得输出序列.数值仿真验证了此算法的正确性,同时海试数据处理结果表明,该算法能够快速地确定合适的SR系统参数,使信噪比为1.013 5 dB的目标辐射线谱明显的凸显出来.

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