基于中值滤波的全垫升气垫船运动仿真参数滤波方法研究

研究了全垫升气垫船运动参数的滤波方法,提出了基于中值滤波预处理的Daubechies小波变换的参数滤波方法,利用中值滤波的去脉冲特性和Daubechies小波的高斯噪音消去特性对仿真全垫升气垫船运动参数滤波.仿真结果表明该方法可以有效去噪,明显改善信噪比.并且将中值滤波和FIR滤波方法结合,有效地减小了FIR使用的阶次,在提高信噪比的同时有效减少了群延时,改善了气垫船在线滤波的实时性能.

Air cushion vehicle signal de-noising methods based on Daubechies wavelet and median filter

The de_noising method given by author has been used in the ACV signal filtering. It's a Daubechies wavelet filtering method based on the median filtering which does a pretreatment for the original signal of ACV. It is proved to be more precision than single usage of the wavelet de-noising method and can separate a signal from noise more effectively. An example is given to prove that based on the median filter pretreatment the level of the FIR filter can be reduced and the group delay shortened in responds.