惯组野外测试时振动干扰的检测与提取

Detecting and Extracting Vibration Disturbance in IMU Field Testing

惯组在野外进行测试时常常会受到地基振动的干扰,这种干扰会对惯组的测试精度造成极大的影响。本文首先建立了振动信号的数学模型,然后利用小波模极大值法对惯组的输出信号进行分析,并推导了抑制噪声干扰、提取振动信号的算法。仿真实验表明,该算法具有很好的检测能力。

Inertial measurement unit（IMU） is often interrupted by the ground vibrationwhen it is calibrated in the field. The vibration disturbance will cause a great influence to the calibrated precision of IMU. Firstly, this paper establishes a mathematical model of the vibration signal, then analyzes the output signal of IMU by using wavelet modulus maximum method. Finally, an algorithm is deduced to restrain the noise disturbance and distill the vibration. The simulation shows that the algorithm has good detection ability.