Printing machine with printing groups driven by individual electric motors

US5988063A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Günther Brandenburg · Drolshagen, DE
• Stephen Geissenberger · Augsburg, DE
• Michael Schramm · Greding, DE
• Nils-Hendric Schall · Berlin, DE

Key dates

• Filing date: Sep 14, 1998
• Grant date: Nov 23, 1999
• Expiry date: Sep 14, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2557/2644
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A printing machine driven by one electric motor or by individual electric motors controllable by their own respective associated control systems. The control systems contain a subsystem observer or a total system observer, which obtains from the actual rotational angle speed (.omega..sub.ist) or the actual rotational angle (.phi..sub.ist) as well as from the electric-current or moment target value or actual value of the electric motor, an observed load torque (M.sub.LAST), which is supplied to the adjustment element as a component of the target moment (M.sub.soll). This signal can be applied via a differentiating filter or, in addition, via the proportional element, to the summing point. Alternatively to or in conjunction with the observer, a periodic compensation controller is provided in the control loop. The periodic compensation controller provides deviation-control for periodic disturbances and obtains, from the differential angular speed (.omega..sub.D), a component (M.sub.2soll) of the target load moment (M.sub.soll). To improve signal quality, filters can be used.