Printing machine with printing groups driven by individual elect

Details Printing machine with printing groups driven by individual elect Printing machine with printing groups driven by individual elect

1998-09-14

1999-11-23

Burr, Edgar

Printing

Rolling contact machines

Rotary

101183, B41F 504

Patent

active

059880635

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.

REFERENCES:
patent: 4271379 (1981-06-01), Eckelmeyer
patent: 4905135 (1990-02-01), Unehara et al.
patent: 5272428 (1993-12-01), Spiegel et al.
patent: 5826505 (1998-10-01), Volz et al.
patent: 5826508 (1998-10-01), Komori
IFRA Newspaper Techniques, English Edition, Dec. 1991, pp. 1,3,68,69.

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