In this article, a new entropy control strategy has been implemented for the web formation at the wet-end of a pilot paper machine. The innovative idea of entropy control for stochastic systems has been proposed and proved to be applicable for this system. Through real-time tests, the effectiveness of the new modelling method and the robust controller design method has been demonstrated. The current research concerns only the influence of the polymer on formation quality, which may be insufficient for the requirements of the real paper industry. Further research should consider the retention system with fibre as well as filler. Therefore, other control inputs must be considered and the control strategy will be considerably more complex.
[1]
R. J. Trepanier,et al.
Specific perimeter : a statistic for assessing formation and print quality by image analysis
,
1998
.
[2]
Sheng Liu,et al.
A method for improving robustness of industrial PID controllers
,
1999
.
[3]
I. Miller.
Probability, Random Variables, and Stochastic Processes
,
1966
.
[4]
Chang-Chieh Hang,et al.
Robust identification of first-order plus dead-time model from step response
,
1999
.
[5]
Dongjie Gao,et al.
Direct identification of continuous models with dead-time/zeros
,
2000
.