本文讨论微机过程控制的低通和高通滤波问题。用各种方法导出了滤波器的几种不同算法;分析、比较了它们克服数据采集中高频噪声和低频漂移的能力;最后,用开环辨识试验数据的实例证明低通和高通滤波的效果。为微机实时控制中数据处理提供有效的算法。 This article discusses the issue of low-pass and high-pass filtering of microcomputer process control. Several different algorithms of filter were derived by various methods. Their ability of overcoming high frequency noise and low frequency drift in data acquisition was analyzed and compared. Finally, the effect of low-pass and high-pass filtering was proved by the example of open loop identification test data. For computer real-time control data processing provides an effective algorithm.