摘要
针对单个Duffing振子检测微弱信号时相变判别计算量大、时间长、不易把握等问题,建立了一个单向驱动非线性耦合Duffing振子系统。根据横向Lyapunov指数分析了系统在混沌态到大尺度周期态时振子间运动轨迹的同步演化特性,提出了利用同步误差来判别相变的新方法。实验仿真表明,在强噪声背景下该耦合系统仍能够正确快速地检测出微弱信号。
Considering the huge computation and long time calculation in phase transition identification of weak signal detection based on single Duffing oscillator,a unidirectional driving nonlinear coupled Duffing oscillator system is established.System synchronization state from chaotic state to large-scale periodic state is analyzed according to transverse Lyapunov exponent,and a novel method for phase transition identification based on synchronization error is proposed.Experiment simulation shows that this coupled Duffing oscillator system can quickly detect weak signal in strong noise.
出处
《科学技术与工程》
2011年第19期4605-4608,共4页
Science Technology and Engineering
基金
国家高技术研究发展计划(863计划)(2007AA06Z228)资助
