Compensation of cylinder vibration in printing material processing machines

Abstract

A compensation device ( 9 ) for vibrations of an angle variable in a printing material processing machine ( 1 ) having an associated actuator ( 6 ) which acts on the angle variable, the compensation device ( 9 ) receiving a signal representative of the angle variable characteristic, and the compensation device ( 9 ) generating an output signal for the actuator ( 6 ) is disclosed. The compensation device ( 9 ) has at least one filter ( 13 ) in the form of a transfer function or a sum of transfer functions whose frequency parameters correspond to the vibration frequencies to be compensated, through whose effect the output signal of the compensation device ( 9 ) is obtained from the signal at at least one of the discrete frequencies to be compensated.

What is claimed is:  
     
         1 . A compensation device for vibrations of an angle variable in a printing material processing machine having an associated actuator for affecting the angle variable, the compensation device receiving a representative signal representative of the angle variable, and the compensation device generating an output signal for the actuator, the compensation device comprising: 
 at least one filter having a transfer function or a sum of transfer functions having frequency parameters corresponding to vibration frequencies to be compensated,    the output signal for at least one of the vibration frequencies to be compensated being a function of the representative signal passed through the at least one filter.    
     
     
         2 . The compensation device as recited in  claim 1  wherein the angle variable is an angle of rotation of a cylinder or an angle of rotation difference between a first cylinder and a second cylinder.  
     
     
         3 . The compensation device as recited in  claim 1  wherein the transfer function is harmonic for each of the vibration frequencies to be compensated and is represented in the Z range or in the S range.  
     
     
         4 . The compensation device as recited in  claim 1  wherein the transfer function for each of the frequencies to be compensated is a harmonic transfer function.  
     
     
         5 . The compensation device as recited in  claim 4  wherein the transfer function is a cosine transfer function or a sine transfer function or a weighted sum of a cosine transfer function and a sine transfer function.  
     
     
         6 . The compensation device as recited in  claim 1  wherein the representative signal is a time series having a signal train defined at certain points in time.  
     
     
         7 . The compensation device as recited in  claim 1  wherein the compensation device includes a processor executing program steps for obtaining the output signal from the representative signal as a function of the transfer function or the sum of the transfer functions.  
     
     
         8 . The compensation device as recited in  claim 1  further comprising at least one linear phase shift element upstream or downstream from the filter or contained within the filter.  
     
     
         9 . A regulating device for an angle variable in a printing material processing machine, the regulating device comprising: 
 an angle variable transducer,    a regulating element having a regulating output signal,    an actuator affecting the angle variable, and    a compensation device for vibrations of the angle variable as recited in  claim 1 , the output signal of the compensation device being superimposed on the regulating output signal.    
     
     
         10 . The regulating device as recited in  claim 9  wherein the representative signal represents a value of the angle variable or a value of a change in the angle variable or a value of an acceleration or deceleration in the angle variable.  
     
     
         11 . The regulating device as recited in  claim 9  wherein the regulating element has a first input for actual values of the representative signal of the angle variable and a second input for setpoints for the representative signal of the angle variable.  
     
     
         12 . A printing unit in a printing material processing machine comprising: 
 at least one cylinder, and    a compensation device as recited in  claim 1  associated with the cylinder.    
     
     
         13 . A printing unit in a printing material processing machine comprising: 
 at least one first cylinder;    a second cylinder, and    a compensation device as recited in  claim 1  associated with the first cylinder and the second cylinder.    
     
     
         14 . A printing unit group in a printing material processing machine comprising: 
 a first printing unit having at least one first cylinder;    a second printing unit having a second cylinder; and    a compensation device as recited in  claim 1  associated with the first cylinder and the second cylinder.    
     
     
         15 . A printing press comprising a printing unit as recited in  claim 12 .  
     
     
         16 . A printing press comprising a printing unit group as recited in  claim 14 .  
     
     
         17 . A printing press comprising: 
 at least one first cylinder;    a second cylinder mechanically separated from the first cylinder, and    a compensation device as recited in  claim 1  associated with the first cylinder and the second cylinder.    
     
     
         18 . A printing press comprising: 
 at least one first cylinder, and    a compensation device as recited in  claim 1  associated with the first cylinder.    
     
     
         19 . A compensation method for vibrations of an angle variable in a printing material processing machine by influencing the angle variable using an actuator in such a way that the vibrations of the angle variable are reduced, comprising the steps of: 
 determining and processing a representative signal representative of the angle variable in a compensation device to generate an output signal for the actuator,    the output signal of the compensation device being generated for at least one vibration frequency of vibration frequencies to be compensated as a function of at least one filter on the representative signal, the at least one filter performing a transfer function or a sum of transfer functions having frequency parameters corresponding to the vibration frequencies to be compensated.    
     
     
         20 . A regulating method for an angle variable in a printing material processing machine by affecting the angle variable by an actuator in such a way that differences between actual values and setpoints of the angle variable are reduced, the method comprising: 
 compensating for vibrations of the angle variable by a compensation method as recited in  claim 19.