其他摘要：Phase transition identification is the key technology of weak signals detection using Duffing oscillator. Considering the complexity and huge computation of existing algorithms, the instantaneous frequencies of the chaotic and large scale period states of Duffing oscillator system output were analyzed using empirical mode decomposition. A novel method for phase transition identification based on instantaneous frequency of the first intrinsic mode function of Duffing oscillator system output was proposed. Based this phase transition identification algorithm, a new method of weak signals detection using Duffing oscillator was proposed. Simulation results indicate this method’s validity.
关键词：相变;瞬时频率;经验模态分解;弱信号检测;Duffing 振子
其他关键词：Phase Transition; Instantaneous Frequency; EMD; Weak Signal Detection; Duffing Oscillator
