基于Duffing混沌振子的微弱泥浆脉冲信号提取研究

摘要

针对无线随钻测量中泥浆脉冲信号信噪比大、有用信号提取难的问题，本文首先对泥浆脉冲信号的组成成份进行了分析，然后将Duffing混沌振子算法应用到了泥浆脉冲信号的提取上。由于Duffing混沌振子算法具备对初值敏感、对噪声具有较好的抵抗力等优点，所以在检测微弱泥浆脉冲信号时能够表现出良好的效果，从而实现对微弱泥浆脉冲信号的提取。该算法能满足工程应用的要求，可为泥浆脉冲信号提取提供新的思路。%Aiming at the problem of the noise ratio of mud pulse signal and the extraction of useful signal in wireless random drilling, in this paper, the signal components of mud pulse signal were analyzed, and the Duffing chaotic oscillator was also applied to the mud pulse signal. The simulation results showed that because of the Duffing chaotic oscillator algorithm is sensitive to the initial value and has good resistance to noise, which can show the good effect in the detection of weak mud pulse signal, so as to realize the extraction of weak pulse signal. This algorithm not only can meet the requirements of engineering applications, but also can provide a new idea for the mud pulse signal extraction.