Root Cause Analysis of Oscillating Control Loops
نویسندگان
چکیده
Oscillation in a single control loop can propagate to many units and can cause several control loops to oscillate. In this work, an approach that uses detailed oscillation characterization in combination with signed digraphs is proposed for isolating the source loop that causes plant-wide oscillation. The success of this approach is built on a new oscillation characterization technique that identifies the zero-crossings of each oscillating measurement. A signed digraph that embeds the temporal information obtained from the zero-crossings of the data is analyzed to isolate the root cause for oscillation. A simulation case study illustrates the applicability of the proposed approach.
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