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本文针对缓变参数计算机测控系统中，被测参数变化缓慢的特点，提出一种按位判断数字滤波法，并对此进行了数学分析和计算机仿真实验。证明该方法具有理论简单、易于实现、滤波速度快、精度高等优点。适用于各种缓变参数的计算机测控系统，具有一定的理论与实用价值。
Aiming at the characteristics of slowly varying parameters in the computer measurement and control system, this paper presents a bit-by-bit digital filtering method based on the characteristics of slow changes in the measured parameters. The mathematical analysis and computer simulation experiments are carried out. It is proved that this method has the advantages of simple theory, easy to implement, fast filtering speed and high accuracy. Applies to a variety of slowly changing parameters of computer monitoring system, has a certain theoretical and practical value.