摘要
分析了Duffing振子的混沌运动,利用振子相变对与参考信号频差较小的周期小信号具有敏感性和对噪声的免疫力检测微弱周期信号,检测不同频率的信号需要不同频率的参考信号,通过调整系统参数使得振子对不同频率的信号检测具有普遍性。将传感器周期性干扰信号作为对内驱动信号的摄动加入混沌检测中,通过观察混沌振子的状态变量的时间历程图,发现混沌检测系统处于间歇混沌状态,证明了采用Duffing混沌振子检测微弱周期小信号的可行性。
Analyzing chaos movement of Duffing oscillator, detecting weak signal as the phase of oscillator being sensitive to periodic signal and immune to noise, detecting signal of different frequency with reference signal of different frequency, it makes oscillator general to signal detection of different frequency by adjusting system parameters. Making period interfere signal sensor as internal drive signal disturbance and getting it into chaos detection, observing time history chart of state variables of chaotic...
出处
《微计算机信息》
北大核心
2008年第10期122-123,共2页
Control & Automation
基金
"铁路列车运行安全预警系统研制"
电子信息产业发展基金资助项目(信部运[2005]635号)
