基于梁结构超谐波振动的信号倍频放大研究

Frequency multiplication of super harmonic vibration signal based on beam structure

信号发生装置的倍频电路容易受到外界环境因素和器件尺寸的影响,导致工作稳定性变差,影响信号发生装置的性能。为此,本文提出一种基于梁结构机电耦合系统超谐波振动的信号倍频发生方法,给出了超谐波振动倍频信号放大条件。该方法利用激励信号激励梁产生超谐波振动,通过滤波电路滤除激励波信号,保留了激励波三倍频信号,实现了信号的倍频放大功能。设计了超谐波振动倍频信号试验发生装置和高低通滤波电路,滤除激励信号;利用数据采集系统采集超谐波振动信号。试验结果表明:本文的信号倍频放大方法能实现信号频率整数倍放大,超谐波振动倍频信号发生装置能产生稳定的倍频信号。

The multiple frequency circuit of the signal generator is affected by external environmental factors and device size, which can result in poor working stability and affect the performance of the signal generator. A method is proposed for the signal multiple frequency of nonlinear superharmonic vibration of beam structure, which can get the multiple frequency signals by exciting beam to generate superharmonic vibration. A filter circuit is designed to filter excitation wave signal, which can retain excitation wave frequency triple frequency signal. The function of signal multiple frequency amplification mechanical vibration can be realized. A test generator for frequency doubling signal of superharmonic vibration and a high and low-pass filter circuit is designed, which filters out excitation signal. The frequency amplitude curve can be gotten by collecting information of superharmonic vibration. Experimental results show that this superharmonic vibration system can generate stable multiple frequency signal.