1. An online non-intrusive method for alignment between actuators and their response centers on a paper machine
- Author
-
R. Bhushan Gopaluni, Guy A. Dumont, Philip D. Loewen, and M.S. Davies
- Subjects
Paper ,Engineering ,business.product_category ,Online Systems ,Feedback ,Position (vector) ,Control theory ,Factor (programming language) ,Industry ,Computer Simulation ,Electrical and Electronic Engineering ,Instrumentation ,computer.programming_language ,Paper sheet ,Cross-correlation ,business.industry ,Applied Mathematics ,Control engineering ,Models, Theoretical ,Motion control ,Computer Science Applications ,Paper machine ,Control and Systems Engineering ,Actuator ,business ,Closed loop ,computer ,Algorithms - Abstract
Good cross-directional control of sheet variables in a paper machine depends on a number of factors. One such factor is the correct alignment of actuators with their corresponding responses. The alignment changes with time either locally or across the whole paper sheet due to a variety of reasons. In this paper, we provide an online mapping technique based on estimating the cross-correlation between actuator movement and the measurements. This procedure involves two steps–in the first step (called alignment monitoring) we determine if the current mapping is wrong at any CD position, and in the second step (called re-mapping), the alignment of actuators is corrected. The main advantage of this method is in its ability to re-align under closed loop conditions with minimal operational disruption.
- Published
- 2007