一种海浪干扰IIR数字滤波器的设计与仿真

在船舶控制和性能研究中,海浪干扰是不可忽视的环境扰动.海浪影响着舰船的稳定控制和近海面作业的直升机的安全,所以应尽可能想办法消除海浪干扰.文中首先建立了海浪的模型,并进行了三级海况下海浪的实时仿真;接着采用巴特沃兹方法设计了一种海浪IIR数字滤波器,将海浪中的高频一阶波浪部分加以滤除;最后,运用MATLAB编程进行仿真实验,结果表明,所设计的海浪干扰数字滤波器的滤波效果显著,可以用于实际船舶控制应用中.

Design and Simulation of an Ocean Wave Disturbance IIR Digital Filter

In the vessel control and performance research,ocean wave is an environmental disturbance which cannot be neglected.The ocean wave weakens the stable control of naval ships and the flight safety of helicopters working off-shore.So the influence of ocean wave must be eliminated as much as possible by proper ways.At first,an ocean wave model is established and real-time simulated under the third calss sea state code.Then an ocean wave IIR digital filter based on Butterworth method is designed to filter the high frequency first order part of the ocean wave.Finally,the simulation experiment by using MATLAB programming is carried out.The simulation results show that the filtering effect of the designed wave disturbance digital filter is prominent and the filter can be applied to the vessel control.