摘要
针对车载激光雷达输出信号精度受冲击振动噪声影响的问题,建立了冲击振动激励与电路振动噪声响应之间的数学模型,提出了一种基于小波分析的噪声消除方法。该方法通过对车载激光雷达输入冲击激励信号进行小波分析,对输出振动噪声响应信号进行高斯函数拟合,建立了二者间的关联函数,在此基础上设计了输出噪声处理算法。仿真结果表明,该算法对冲击振动引起的车载激光雷达输出噪声有明显消噪效果。
To solve the problem that the accuracy of the output signal of the vehicle-borne LiDAR is affected by the impact vibration noise, a mathematic model of response between the impact vibration excitation and the circuit vibration noise was established. And a noise elimination method based on wavelet analysis was proposed that made wavelet analysis to the input impact exciting signal of the vehicle-borne LiDAR and used the Gaussian function to fit the output vibration noise response signal. Then the correlation function between these two signals was established, and on this basis, the output noise processing algorithm was designed. The simulation results show that the algorithm has obvious de-noising effect on the noise of the vehicle-borne LiDAR caused by impact vibration.
出处
《汽车技术》
CSCD
北大核心
2017年第10期24-28,共5页
Automobile Technology
关键词
车载激光雷达
冲击振动
小波分析
噪声处理
Vehicle-borne LiDAR, Impact vibration, Wavelet analysis, Noise processing
