CAJ | 학술논문

针对传统 Duffing 振子检测方法参数设定繁复、限制条件多的问题，为了快速、准确地检测出微弱次同步谐振信号，根据次同步谐振产生原理，提出了一种变尺度全方位扫描Duffing振子次同步谐振信号检测方法。通过引入尺度系数，实现了对大参数信号的检测；使用全方位扫描方法，消除检测的初相位死区。采用不同信噪比次同步谐振信号进行仿真检测，结果表明所提方法具有检测频率范围广、抗噪性强、对检测微弱信号准确度高的优点。
침대전통 Duffing 진자검측방법삼수설정번복、한제조건다적문제，위료쾌속、준학지검측출미약차동보해진신호，근거차동보해진산생원리，제출료일충변척도전방위소묘Duffing진자차동보해진신호검측방법。통과인입척도계수，실현료대대삼수신호적검측；사용전방위소묘방법，소제검측적초상위사구。채용불동신조비차동보해진신호진행방진검측，결과표명소제방법구유검측빈솔범위엄、항조성강、대검측미약신호준학도고적우점。
Traditional Duffing oscillator detection method is set too complicatedly and has manyrestrictions. In order to detect the weak subsynchronous resonance signal quickly and accurately, based on the basic principle of subsynchronous resonance, this paper presents a varying scale and comprehensive scanning Duffing oscillator subsynchronous resonance detection method. Through the introduction of the coefficient of scale, a large-parameter signal detection is achieved. By using the comprehensive scanning method, the detection dead zone of the initial phase angle is eliminated. The simulations of sub-synchronous resonance detections with different signal-to-noise ratios are conducted. Results show that the method has a wide detection frequency range, good noise immunity and high accuracy of weak signal detection.