摘要
分析了Duffing振子的间歇混沌发生原理.研究了基于Duffing方程间歇混沌理论的混沌弱信号检测法,该方法对周期小信号具有敏感特性,能够在强噪声环境下实现对微弱周期小信号的检测.分别采用频谱分析法和混沌弱信号检测法对齿轮裂纹声发射实验数据进行检测,结果表明混沌弱信号检测法具有更高的检测精度和更强的抗干扰能力.
The paper introduces the principle of duffing oscillator and intermittent chaos, studies the detection method of weak Signal based on chaotic duffing equation. The chaotic oscillator is sensitive to faint periodic small signal, and can detect the faint periodic small signal in strong noise background. The dulling oscillator detection approach and frequency spectrum method are compared through analyzing the AE signal of gear crack, the result indicates duffing ocillators detecting method has superiority in detection precision and antinoise ability.
出处
《武汉理工大学学报（交通科学与工程版）》
2009年第2期318-320,328,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
湖北省自然科学基金项目资助(批准号:2006ABA011)
