Compensation for the effect of cylinder friction in the pressure feedback control of the nip load on a paper center winder

Author

Nevala, K.

Author_Institution

Machine Autom., VIT Autom., Oulu, Finland

fYear

1994

fDate

5-9 Dec 1994

Firstpage

159

Lastpage

163

Abstract

This paper describes the development of a control method for paper center winder. The control method includes pressure feedback control of the nip load between the paper roll and the backing roll based on an electrohydraulic servo system. In pressure feedback control of the nip load, the set points for pressure are calculated using a continuous function which is fitted between the target points calculated in the definition of the winding cycle. The cylinder friction is compensated for by a function which takes into account the effects of viscous friction, static friction, Coulomb´s friction and cylinder load pressure on the frictional force. The functioning of the control method has been verified experimentally using equipment containing the functions of a paper center winder

Keywords

compensation; electrohydraulic control equipment; feedback; friction; paper industry; pressure control; servomechanisms; Coulomb´s friction; backing roll; cylinder friction; cylinder load pressure; electrohydraulic servo system; friction compensation; nip load control; paper center winder; paper roll; pressure feedback control; static friction; viscous friction; winding cycle; Automatic control; Automation; Control systems; Feedback control; Finishing; Force control; Friction; Pressure control; Stress; Weight control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 1994., Proceedings of the IEEE International Conference on

Conference_Location

Guangzhou

Print_ISBN

0-7803-1978-8

Type

conf

DOI

10.1109/ICIT.1994.467200

Filename

467200