Interaction measures for the decentralized tension control system

In a web tension control system, the mutual interactions between the control stations is the major problem when designing a control system. The information structure can take two forms: (a) decentralized control with disjoint information structure, or maybe called nonoverlapping decomposition structure, and (b) decentralized control with overlapping decomposition. The paper discusses the controller design guidelines with the mutual interaction analysis for these forms of control structure. The paper discusses the controller design guidelines for decentralized web tension control system with the aid of some forms of interaction measures and the modeling concept. We first suggest how to determine the subsystems used for controller design. The analysis contains four ways for evaluating the interactions, which cover two concepts of stability and output error behind the formulations. It is made clear how the interactions work in terms of frequency.