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针对ⅡR数字滤波器和FIR数字滤波器进行了分析比较,介绍了基于飞思卡尔56800系列DSC芯片的巴特沃斯数字滤波器的实现方案,包括一阶低通滤波器和二阶带阻滤波器。并以一阶低通滤波器和二阶带阻滤波器为例进行了伺服控制系统的滤波仿真和实验,对滤波测试结果进行分析,表明此类滤波器方案在伺服控制系统中可以实现消除噪声、减小混叠、衰减谐振等作用。
According to the analysis and comparison of ⅡR digital filter and FIR digital filter, the realization of Butterworth digital filter based on Freescale 56800 series DSC chip is introduced, including first-order low-pass filter and second-order band-stop filter . Taking the first-order low-pass filter and the second-order band-stop filter as an example, the simulation and experiment of the servo control system are carried out. The results of the filtering test are analyzed. The results show that this kind of filter scheme can eliminate the noise in the servo control system , Reduce aliasing, attenuating resonance and so on.