F Flehmig, Wolfgang Marquardt:
Monitoring trends of unmeasurable process quantities
4th IFAC Workshop on On-line Fault Detection and Supervision in the Chemical Process Industries, CHEMFAS–4, Jejudo Island, Korea, 7-8.6.2001, 115-120
In this paper, a methodology is suggested for analyzing the behavior of a chemical process with respect to the extent in which trends in unmeasurable process quantities can be identified through recognition of trends in measurable process quantities. The analysis is based on a linear approximation of the nonlinear dynamics. It is shown how the suggested methodology can be employed in order to design a trend monitoring system for the task of inferring trends in unmeasurable process quantities from measurement trends. One key question for the successful design of such a system is the selection of appropriate measurements for which trend monitoring is performed on-line.
Process monitoring, trend recognition.