基于共振解调模拟电路的滚动轴承早期故障检测性能研究

摘要

The resonance demodulation circuit is one of the most commonly used techniques in fault diagnosis of rolling bearings,but the quantitative evaluation of the performance of the fault detection has not been reported.Therefore,this article uses fault bearing vibration acceleration signal which is respectively modulated by sinusoidal signal and pulse signal as an input of the circuit.The performance of the fault detection in the condition of different signal to noise ratio(SNR)is analyzed quantitatively,and the modulation law of the circuit key design parameter,the quality factor Q of the band-pass filter,is studied,which provided a reliable scientific basis for the practical engineering application of the resonance demodulation circuit in the early fault detection of bearing.%共振解调模拟电路是滚动轴承故障诊断中最常用的技术之一,但是其故障检测性能的定量评价研究尚未见报导.因此,分别以正弦调制和脉冲调制所构造的故障轴承振动加速度信号为电路输入,定量分析了共振解调电路在不同信噪比条件下的故障检测性能,并研究了电路中的关键设计参数--带通滤波器品质因数Q的调制规律,为共振解调模拟电路在轴承早期故障检测的实际工程应用提供了可靠的科学依据.