跟踪微分器滤波性能研究

Study of Tracking Differentiator on Filtering

对跟踪微分器的滤波性能进行了研究,由跟踪微分器滤波所产生的相位延迟,利用它能够得到的原始信号的滤波信号和其微分信号,采用预报的方法进行补偿。仿真结果表明,所采用的这种近似方法较好地再现了原始信号。在一个采样时间不固定,且采样信号带有噪声的应用实例中,采用变步长的跟踪微分器加预报的方法得到了较好的结果。

In this paper, some results of tracking differentiator(TD) on filtering are presented. By virtue of the filtered signals and their differentiated signals, the phase delays produced after being filtered are compensated by predicting. Some simulation examples prove that the initial signals can be better recovered by the method of TD and predicting. In a practical example, a good result is obtained by the adoption of step-varying TD and predicting under the condition of sampled signal with noise and sampled time varying.