航空重力数据无限脉冲响应低通数字滤波器设计与试验研究

摘要

We design IIR (Infinite Impulse Response) lowpass digital filters based on Butterworth and Chebyshev approach, do the experiment research of filtering GT-1A airborne gravity data, and get some meaningful results. By selecting proper parameters such as passband and stopband attenuation, these IIR lowpass digital filters for airborne gravity data can get satisfactory filtering effect almost as good as GT-1A result.%采用巴特沃思(Butterworth)和切比雪夫(Chebyshev)逼近,设计无限脉冲响应(Infinite Impulse Response,IIR)低通数字滤波器,对GT-1A航空重力勘查系统的测量数据进行了滤波试验研究,结果表明,通过选择合适的通带和阻带衰减等滤波参数,IIR低通数字滤波器在航空重力数据的低通滤波处理中可以发挥重要作用,获得与GT-1A系统滤波结果几乎同样满意的滤波效果.