摘要
光纤加速度计凭借自身的诸多优势而受到军事和国防领域的青睐,因此广泛应用于惯性导航系统;但由于受光源光功率的随机变化、光电探测器噪声、电路噪声以及环境噪声的影响,光纤加速度传感器的输出信号通常非常微弱,而且含有大量噪声,从而降低了光纤加速度计的精度,首先针对光纤加速度计系统中的几种主要噪声及其特征进行了分析,针对噪声的特点,研究了小波包分析的方法,并利用该方法提取信号中的有用信息,最终达到削弱干扰噪声的目的;从仿真结果来看,该去噪方法有效。
Owning to their many advantages, military and national defense are interested in fiber-optic accelerometers. As a result, they are extensively applied in the system of inertia navigation. However, be effected with the power of light, the noise of photoelectricity detector and the noise of electric circuit, the output acceleration signal is usually very weak and contains quantities of noise, reducing the precision of the fiber-optic accelerometers. Based on the analysis of several kinds of primary noise in the fiber-optic accelerometer system and their properties, the method of Wavelet Packet Analysis is introduced to pick up the useful information, attaining the aim of denoising. The simulation indicates that the proposed scheme is effective.
出处
《计算机测量与控制》
CSCD
2007年第2期162-164,169,共4页
Computer Measurement &Control
关键词
光纤加速度计
微弱信号
信号检测
小波包
fiber-optic accelerometer weak signal signal detection wavelet packet
