Abstract
Plant-wide oscillations are common in many processes. Their effects propagate to many units and may impact the overall process performance. It is important to detect and diagnose the oscillations early in order to rectify the situation. This paper proposes a new procedure to detect and diagnose plant-wide oscillations. A technique called spectral envelope is used to detect the oscillations. Two kinds of plots - scaling and power plots - are proposed to identify the variables exhibiting common oscillation(s). These plots are also useful in isolating the key variables as the candidates of the root cause. An industrial case study is presented to demonstrate the applicability of the proposed procedure.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
