摘要：AbstractAmong the causes of oscillation in control loops, stiction in control valves has the highest incidence. There are several works on stiction detection, but few of them discuss problems related to industrial data. Fast process dynamics combined with low sampling periods cause problems in the detection, since the number of data per cycle may be less than that required for the analysis. This study evaluates the effect of sampling period on five stiction detection methods. The evaluation was lead using standard signals and industrial data. The results present the minimum signal sample rate required by the selected methods and the lack of techniques for stiction detection in signals with low sampling.
关键词：KeywordsControl valvesstiction detectionoscillation controlfault detectionsampling periods
