Controllability analysis of an unstable, non-minimum phase process
Abstract
The choice of manipulated inputs and measured outputs can be critical for the successful design of a control system. This is especially the case when designing stabilizing controllers for unstable, non-minimum phase systems, as unstable poles combined with unstable zeros and time delay can render stabilizing control very hard. Since the presence and location of unstable zeros and time delay usually depends on the choice of measurements and control actuators, a thorough analysis prior to the actual controller design is important. In this paper, a controllability analysis is performed on a pipeline-riser system with multiphase flow, where the design objective is to stabilize an unstable operating point to remove riser slugging.
