The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1999
Filed:
Sep. 14, 1998
Gunther Brandenburg, Grobenzell, DE;
Stephen Geissenberger, Augsburg, DE;
Michael Schramm, Aindling, DE;
Nils-Hendric Schall, Augsburg, DE;
Man Roland Druckmaschinen AG, Offenbach am Main, DE;
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.