Mechanical model and vibration equation of vibratory percussive drilling are established,the meaning of the solution to the vibration equation in vibratory percussive drilling is discussed by analyzing the conditions of vibratory percussive drilling in the pape
通过对机械振动钻进工况的分析，提出了机械振动钻进的力学模型，建立了机械振动钻进的振动方程，并就方程的解对振动钻进的意义进行了探
Wavelet packet transform can not only detect integer harmonics of non-steady signal,but also detect non-integer harmonics,and wavelet transform is sensitive to signal of the strange point,it can be used to track roller drilling vibration signal.
小波包变换不仅能检测非平稳信号的整次谐波,还能检测信号的非整次谐波,而且小波变换本身对信号的奇异点十分敏感,因此可以用来跟踪牙轮钻机振动信号。