EP2275704A1 - Monitoring a device that produces vibrations - Google Patents

Abstract

The method involves measuring sound vibrations (121a, 122a) produced by a machine (10). The vibrations are evaluated for calculating counter sound vibrations (121b, 122b) that weaken a portion of sound vibrations that are produced by the machine. The counter-vibrations are produced for temporal weakening of the vibrations by superimposition of the vibrations and the counter-vibrations at superimposition-vibrations (121, 122). Operating conditions of the machine and characterizing vibration parameters (34b) are determined from the superimposition-vibrations for monitoring the machine. The operating conditions comprise pre-humidity, operating point in linear or non-linear characteristic area, full load, partial load, idle state, loss, partial fault of web and high temperature. Independent claims are also included for the following: (1) a system for monitoring the machine that produces the vibrations (2) a method for providing an information system for monitoring the machine.

Description

The invention relates to a method and a system for monitoring a machine, preferably a printing press, such as a rotary printing machine, which generates vibrations, as well as a method for generating and / or maintaining an information system for the operation of the machine.

For suppressing vibrations, in particular sound, measures are known which may be substantially passive or active. Passive measures are characterized by the use of a sound absorber, which attenuates the sound across its propagation direction. On the other hand, active measures are based on the simple physical principle, whereby an oscillation to be extinguished is extinguished by superposing an antiphase oscillation. In the FIG. 1 the principle of an active method is shown, wherein an oscillation A is superimposed with an antiphase oscillation B, so that for the superposition (A + B) a vanishing amplitude results. An ANC (Adaptive Noise Control) method is essentially that in the FIG. 1 This principle is reversed, whereby the antiphase oscillation is dynamically adapted to the instantaneous properties of the oscillation. A large number of such systems are known from the prior art which are used, for example, for minimizing background noise in the vicinity of a printer or copier ( JP 6282275 . JP 7160272 . JP 2000155588 . JP 9281976 ).

Noise in the vicinity of a machine can also be used to make conclusions about a state of the machine. From the JP 62073949 For example, a system for detecting a printer malfunction is known wherein the detection is performed based on measurements of vibration, temperature, and sound. From the JP 51555002 is related to judging properties such as flaking known with a printing process of a printing press, wherein the assessment based on measured sound takes place.

From the EP 0259636 It is known that problems that may arise in the operation of a printing press, such as printing difficulties that lead to doubling, be assessed by metrological detection of a sound of the printing press. For this purpose, sensors for absorbing air and structure-borne noise are arranged on the machine. The information obtained by means of sound measurement are used to control the printing press, for example for tempering the Farbverreibwalzen.

From the EP 1767364 For example, there is known a method of controlling the printing conditions and materials of a printing press, wherein an acoustic signal of the printing press is measured, analyzed and associated with a printing or non-printing area of the content to be printed.

The object of the invention is to suppress vibrations in the environment of a machine and at the same time to use for monitoring the machine.

The above object is solved by the subject matters of the independent claims. The dependent claims are directed to advantageous developments.

One aspect of the invention relates to a method for monitoring a machine producing at least one vibration, in particular a printing press. The method comprises the steps of measuring the at least one vibration generated by the engine, evaluating the at least one vibration generated by the engine to calculate at least one of at least one or a portion of the vibration generated by the engine, generating the at least one countervibration for mitigating the vibration generated by the machine. Finally, an operating condition of the engine and / or at least one characteristic vibration parameter for monitoring the engine from a superposition vibration or from the vibration generated by the engine are determined. The superposition vibration results from a superposition of vibration and counter vibration. The mitigation of the vibration generated by the machine is at least partially mitigating.

The operating condition may describe a condition of the machine, a situation in which the machine is located, a lack or presence of a quality or characteristic of the machine, a lack or presence of consumables or resources for the machine, as well as a deviation from normality , Operating states of the machine can be, for example: pre-moistening, operating point in the linear characteristic range, operating point in the non-linear characteristic range, full load, partial load, idling, breakdown, partial lack of a path, temperature too high.

The machine, which may also be a machine component or a machine element, has one or more rotating machine elements, such as a roller, a roller, a cylinder, a gear, or a ball bearing, wherein the rotating machine elements substantially produce the vibration. The oscillation can thus have a periodic or quasi-periodic character. The vibration can also be generated by machine elements that touch each other and perform a translational movement relative to each other. The parameters of the countervibration, for example amplitude, frequency or frequency response, phase or phase response, can be adjusted in the evaluation of the vibration generated by the machine depending on the corresponding parameters of the vibration so that predetermined or predetermined criteria are met. The criteria can be set in view of the fact that, for example, the overlay vibration in a given space and / or frequency range are reduced so that the outgoing of the overlay vibration, the operator of the machine perceived as disturbing effect is reduced and at the same time the overlay vibration remains unaffected in that it can be used for further technical applications, for example determining an operating state of the machine.

The vibration generated by the machine and / or the superposition vibration can also only partially or completely attenuated. As a result, for example, a sound pressure in the vicinity of the machine or in a hall in which the machine is operated can be suppressed to the extent that the people working on the machine or in the hall are less disturbed by the sound generated by the machine. At the same time, the overlapping vibration comprising the sound and the vibrations of the machine is not changed or reduced in such a way that a detection of the vibration parameters by means of Measuring the overlay vibration is no longer possible. In other words, the self-contradictory goals to mitigate the sound in the environment of the machine and at the same time to use to monitor the machine can be achieved simultaneously.

According to one embodiment, the vibration generated by the machine and / or the superimposition oscillation can be completely optimally attenuated, that is to say maximum or as far as is technically feasible.

According to an embodiment, the overlay vibration may be measured and the countervibration may be generated to attenuate the vibration generated by the engine or the overlay vibration in response to the measured overlay vibration. When starting the method, initially only the vibration generated by the machine is present. This is measured, from which a countervibration for superposition with the at least one vibration generated by the machine is determined in order to mitigate the vibration generated by the machine. After the transmission of the countervibration there is an overlapping vibration comprising the at least one vibration generated by the machine and the countervibration. From this point in time, essentially the superimposition oscillation is measured, wherein in the space surrounding the machine essentially the superposition oscillation is perceptible by humans, for example in the form of sound or vibrations. From this point on the counter-oscillation is generated in such a way that the superimposed oscillation is attenuated.

Thus, the countervibration can be determined either as a function of the vibration generated by the machine, for example by means of a microphone positioned close to the vibration source, or depending on the superposition vibration, or in response to both the vibration generated by the machine and the superimposed vibration become.

The countervibration can be generated in such a way that predetermined spatial regions become stronger and the remaining spatial regions are less strongly attenuated. The specification of the room areas with a greater attenuation may be based on where operators of the machines essentially reside. Those in the room areas with less attenuation Measured local oscillation can be used to determine information about the operation of the machine to monitor the machine.

3. According to one embodiment, from the overlay vibration, at least one vibration parameter characterizing the vibration generated by the engine may be detected for monitoring the engine. Monitoring may consist in that one of the measured or determined operating parameters of the printing press is regulated or controlled or displayed to an operator. Monitoring can also consist in that, based on an evaluation of the status information, a malfunction of the printing press is forecast or a maintenance of the printing press is planned. Monitoring may be a continuous, continuous control of the machine with regard to an operational and / or process and / or hardware and / or software fault, an anomaly of the operation or deviation from normal states or operations. If the monitoring is a control or control of the machine, the control may be an adaptive and / or fuzzy and / or database based control.

The vibration parameter may be a fundamental frequency, an amplitude of the fundamental frequency, a first harmonic, a first harmonic amplitude, a frequency response, or a phase response. The vibration parameter may relate to discrete values of frequency and / or phase of the vibration and associated amplitude values. For example, a significant increase in a selected harmonic of a fundamental vibration of a predetermined engine component may be considered indicative of a malfunction of the particular engine component. The amount of increase may be related to a physical size of the machine or machine component, such as a speed, rotational speed, or spin.

The vibration parameter may be a time-dependent and / or location-dependent profile of at least one spectral component and / or an amplitude and / or a phase of the vibration. For example, historical patterns, that is, history recorded during previous operating phases of the machine, may be related to malfunctions or operating characteristics of the machine. The currently measured time- and / or location-dependent course of the spectral components and / or amplitude and / or phase can be checked for agreement with historical or recorded history patterns, from which can be deduced is whether the current operation of the machine has a certain malfunction or operating characteristic. The test can be carried out using standard pattern recognition methods.

The vibration parameter may include combinations of amplitude, frequency or phase information. Combinations can also be understood as a pattern, wherein an occurrence of a pattern can characterize an operating state. In order to determine the relationships between operating states and patterns of the vibration parameters, the methods known from artificial intelligence can be used. The advantage of evaluating operating conditions by evaluating patterns of the vibration parameters over a direct measurement of the operating parameters is that different operating conditions may result for the same combination of operating parameters, the operating conditions differing due to the presence of a malfunction that can not be detected by an operating parameter is. Thus, for example, given a certain combination of physical variables such as temperature or rotational speeds of several machine components, the operating state may be normal, and once defective or problematic, depending on the respective vibration parameters. In this way, not only the classic control variables such as amount of water, amount of color or color water mixture can be controlled, but also operating states, which are described by linguistic variables, such as normal operating state.

The operating state can be characterized by operating information. By means of this operating information, the machine can be monitored. The operating information, which can be represented in terms of information technology as a set of data records by means of a plurality of data fields, relates to at least one, preferably two, three, four or more operating parameters, and / or the at least one vibration parameter, and / or status information relating to a fault or normal function of the machine , The operating parameter may relate to a quantitative quantity, for example a physical quantity such as speed, speed or temperature. The operating parameter may assume discrete or binary values, for example an on / off state, or a first roll is applied to a second roll and to a third roll: yes / no, or warm-up phase, or represent a countable size, for example a number of printed pages. The operating parameter may also be digital information of a print motif.

The status information may relate to the failure of one or more machine components, which failure may be imminent or already occurred. The status information may include a linguistic variable, such as "good", "bad", "defective", "failed" or "failing", to which a continuous numerical value on a scale between a minimum and a maximum value may be assigned. Typical status information is, for example, "color OK", or "color too thick", or "transmission between a first roller and a second roller faulty".

By means of evaluating the operating information, the at least one operating parameter of the machine can be determined and / or changed, and the status information of the machine can be evaluated with regard to a faulty or normal function of the machine. The aim of the evaluation may be to monitor at least one of the following quantities: a quantity of water, a quantity of paint, a color water mixture, a speed, a web tension, a nip of two rolls, a color split, a Schmitz.

As nip is generally referred to the contact surface, which forms in juxtaposed, in particular approximately cylindrical bodies of revolution. The rotational bodies may, for example, be ink rollers or dampening rollers, in particular a dyeing or dampening unit, or a forme cylinder or transfer cylinder, in particular a printing unit.

As Schmitz is generally referred to a mistake in the printing process, which manifests itself in the form of a smeared impression and / or blurred print image. In a roll die, the inking rollers slip on the guide rails, for example, due to oil or grease on the rollers or of different roller diameters, so that the peripheral speed of the roller is lower or higher than that of the underlying mold Too much wear of the rollers or races, so that the diameters differ. " (Wikipedia.org)

Monitoring the machine may mean that an error message or an alarm is issued and / or the operation of the machine is changed, for example, by the workload the machine is throttled or the machine is stopped if the operating information or parts thereof, such as the status information and / or the operating parameters, have values according to an error pattern or outside an approved range.

Monitoring of the machine can also mean that the machine is controlled or controlled by means of the operating information, for example by using one of the measured or determined operating parameters of the printing press for controlling or displaying the machine or to an operator, or by evaluating the status information Malfunction of the printing press predicts or maintenance of the printing press is planned.

According to one embodiment, for monitoring the machine, the following steps may be performed: providing an information system with operating information, accessing operating information stored in the information system by executing an interrogation of the vibration parameter, and determining quantities indicative of an operating state of the machine, such as operating parameters and / or status information from the operating information. The information system may be a database, such as a relational or a fuzzy database, a table, or a neural network. Therein, the operating information is stored or stored in the form of data records.

The use of the information system is based on the idea of using the information system in two phases. In a first phase or build phase or learning phase, the information system can be filled with as many operating states of the machine operating information. In a second phase or implementation phase or generalization phase, operating information can be retrieved from the information system. Here, a first, known or available part of the operating information, for example one or more characteristic vibration parameters, can be input as input to the information system. Thereupon, as output, a second, sought-after part of the operating information can be obtained, for example at least one operating parameter or status information which characterizes the operation of the machine.

Preferably, at least one operating parameter can be determined by measuring the operating parameter. It can sensors for each physical occurring on the machine or technical size, such as temperature sensors, pressure sensors or humidity sensors, are arranged on one or more machine components, whereby the corresponding physical size measured and associated signals are provided. Preferably, electrical or electronic signals can also be tapped directly and stored as operating parameters.

Due to the different detection possibilities of an operating parameter by measuring the operating parameter and by means of queries in the information system, a cross-check of the determined values can be carried out. If the cross-check detects a difference between the determined values, appropriate measures can be initiated, for example, maintenance or replacement of measuring sensors.

The monitoring of the machine may include altering the operating parameters, with the aim of bringing the operating state of the machine representable by a multi-dimensional vector into a desired value range, or outputting the operating information or taking an emergency measure, for example shutting down the machine.

In an advantageous embodiment, the vibration generated by the machine and / or the superposition vibration is attenuated only partially or partially or incompletely in the time domain and / or in the frequency domain and / or in the local area. The weakening can be, for example, 100 percent, or 50 percent, or 10 percent. That is, in a first range of the time, frequency or location range, the vibration generated by the machine and / or the beat vibration is attenuated, and in a second range complementary to the first range, no or only a reduced attenuation is performed. In the areas with no or reduced attenuation, the overlay oscillation can be evaluated to determine the oscillation parameters.

According to one embodiment, a periodic time window or a periodic time slot may be determined in which the vibration generated by the machine and / or the superposition vibration are not or only partially attenuated. Time windows may be understood to be a fixed length period of time within which a resource may be used or an action or process may be performed, for example a weakening of a vibration, wherein the period is periodically available. In the time outside the time window, the vibration generated by the engine and / or the overlay vibration are attenuated more than within the time window, preferably as best as possible or optimal. The periodic time window can be defined by means of synchronization signals, wherein at the beginning of the time window a start synchronization signal and at the end of the time window an end synchronization signal is transmitted. With regard to a synchronization period between two successive start synchronization signals, the size of the time window can be chosen to be very small, so that the people in the vicinity of the machine or in the hall in which the machine is installed do not perceive the time window and only the suppression or perceive the attenuation of the sound during the time outside the time window. The length of the time window can be, for example, between 0.1 percent and 10 percent of the synchronization period. Preferably, the length of the time window may be a dynamic quantity that changes during operation of the machine, that is, can be increased or decreased, depending on the operating information.

According to a further embodiment, the vibration generated by the machine and / or overlay vibration can be attenuated according to one or more user specifications. One of these specifications concerns a magnitude of the mitigation. In this case, the vibration generated by the machine and / or superposition oscillation can be reduced by a predetermined amount, for example by a factor of 0.8 or 0.2 or 0.02 or by 10 dB or by 20 dB. Alternatively, the maximum value of 100%, for example, the size of the maximum possible or optimal attenuation can be understood, with a desired attenuation may have a value less than or equal to 100%.

Another requirement concerns a location dependency of the attenuation. Here, the user can select one or more location areas in which a stronger attenuation is desired, for example, because in these areas the operators of the machine want to work undisturbed by the disturbing sound of the machine. In the other local areas, a smaller attenuation is carried out, so that a better recognition of the vibration parameters from the superimposed oscillation measured there is possible.

Another requirement relates to a frequency dependence of the attenuation or at least one frequency range for the attenuation. In this case, discrete frequencies can be specified at which the oscillation is to be suppressed. For example, a range of frequencies to be excluded from the attenuation may be determined or determined because there are lines or gradients in this area with particular patterns indicative of machine malfunction.

A specification concerns at least one vibration source whose vibration is to be mitigated. Thus, one or more machine components can be selected, which generate particularly much disturbing sound, wherein the vibrations of these machine components are selectively suppressed, for example by the sound-generating vibrations by means of electro-mechanical transducers, such as piezo elements, countervibrations are superimposed. Preferably, machine components that are of particular importance to the operation of the machine, but produce less vibration or noise than other machine components, may be wholly or partially excluded from attenuation of the overlay vibration.

The user preferences may also be combined, for example, by suppressing the vibration of a selected vibration source to be strong in a periodic time window and little suppressed outside that time window.

The attenuation can also be chosen so that a good audible residual sound remains, which can be used by the people around the machine for a personal assessment of the operating condition of the machine.

According to another embodiment, the operating parameter of the machine may be one or more of: a continuous or discrete control signal, information to be printed, a material property of a machine component, such as a rubber roller or plate, or a material used for printing For example, paper, paint, blanket, mechanical pressure on a roll surface, a kinematic quantity such as rotation angle, rotational speed, spin, one or more rotating machine components, a temperature, an ON / OFF state. Apart from a physical or technical size, the Operational parameters may also be a linguistic quantity of a certain severity, for example, high temperature, or normal speed.

Preferably, the vibration is a vibration or mechanical vibration and / or a sound of at least one machine component. The oscillation may have any desired time sequence, for example a sinusoidal, a rectangular or a sawtooth-shaped drain, or even combinations thereof. In general, sound occurs together with a vibration, where the vibration of the mechanical vibration of a solid or liquid element and sound as the air vibration are called. The sound may have a spectrum inside and / or outside of the human audible spectral range.

According to one embodiment, a malfunction / malfunction can be detected by the fact that the operating information, for example an operating parameter or a vibration parameter, has values within a fault range, the fault range being a predetermined value range of the operating information. Thus, a disturbance may be characterized in that a temperature has a value higher than a predetermined maximum value or a lower value than its predetermined minimum value. For all operating parameters assigned physical or linguistic quantities which should have values within a desired range or normal range for normal operation of the machine, a disturbance range may be defined, the disturbance range being a range complementary to a normal range.

A fault area may have variable limits or dependencies on certain operating parameters. For example, a disturbance may be defined so that a sound amplitude exceeds a predetermined value, the sound being assigned to a particular machine component, and having a specific value constellation of other operating parameters of that machine component, such as temperature, rotational speed, or pressure.

A disturbance can also be defined by the fact that, for example, certain components of the oscillation have predetermined values or the frequency spectrum has a predetermined course. Preferably, a disturbance can be detected by being predetermined Elements of the operating information, for example predetermined operating parameters and / or vibration parameters, have values which correspond exactly or approximately to a predetermined value pattern. In order to check whether the selected elements of the operating information correspond to the predetermined pattern, common pattern recognition methods can be used.

According to a further embodiment, a malfunction can be predicted on the basis of the operating information. For example, a temporal course of predetermined operating parameters or vibration parameters can be analyzed for the prognosis, it being possible for the time profile to be continued or predicted beyond the respective current time. If the predicted values of the operating parameters, the vibration parameter or other elements of the operating information have values within the interference range or outside the normal range, then it can be assumed that a fault will occur. In this way, it is possible to predict both the type of disturbance and the time of occurrence of the disturbance.

Preferably, a fault also affects a wear of the machine. The wear of the machine can be characterized by a value of a vibration parameter or a value combination of several vibration parameters and / or operating parameters. The degree of wear can be characterized by a numerical value. Depending on the severity of the wear, as well as one or more elements of the operating information and / or the operating state of the machine, a maintenance of the machine can be planned or executed. If, for example, it is determined that there is a high degree of wear as a result of operating the machine under extreme conditions, the maintenance intervals can be shortened or the next maintenance date can be brought forward.

Based on the operational information, variables relevant to the operation of the machine may be monitored, wherein monitoring includes controlling, controlling and / or controlling the machine or machine component and / or the relevant quantities. These quantities include consumables such as a quantity of water, an amount of paint or a mixing ratio of a color water mixture. The variables relevant to the machine relate, for example, to a speed or rotational speed, at least a machine element or a machine component, and / or a web tension, and / or a color split, and / or a Schmitz, and / or a NIP of two rolls. The monitoring may also be performed, for example, for a bearing and / or a Schmitzringschmierung / Schmitzringzustand and / or a folder, in particular a wear underlying components of the folder such as brushes, springs or cutting device. The variables or controlled variables that are relevant for the operation of the machine and / or one or more elements of the operating information can be output visually and / or acoustically by means of an output unit. The output unit may include one or more computer displays, gauges, warning lights and / or speakers. The outputting of information can also relate to sending at least one SMS message to at least one mobile phone. The outputting of the information may further relate to a targeted amplification or attenuation of the sound from one or more sound sources, which are determined or determined during the operation of the machine.

The visually or acoustically output information preferably relates to a vibration or acoustic map, which is determined to represent the measured and / or calculated superposition vibration. The measurements can be carried out, for example, by means of microphone arrays and / or arrays of piezo elements. For fixing reference images of the measuring arrangement and sound sources, the microphone array and at least one optical camera can be arranged in a predeterminable position relative to one another in order to document at least part of the measurements from the optical camera.

The acoustic map can detect acoustic vibrations and / or vibrations, as well as represent a spatial amplitude and / or frequency distribution of the superimposed oscillation. Based on the map, an operator may derive information relevant to the operation of the machine or an assessment of the condition of the machine. Based on the map, the sources of vibration can also be determined or determined.

Another aspect of the invention relates to a method for providing an information system for monitoring a machine, preferably a printing press. The monitoring is performed by measuring or determining at least one operating parameter of Machine and / or a status information of the machine based on at least one of a measured, generated by the machine vibration or from a measured overlay vibration determined characteristic vibration parameters of the machine executed. The monitoring is further by means of evaluating and / or changing the at least one operating parameter of the machine and / or the status information of the machine, wherein in the information system at least one operating information is stored, comprising the at least one operating parameter and / or the at least one characteristic vibration parameter of the machine ,

The information system provides records by means of which relationships between one or more operating states of the machine on the one hand and one or more operating information on the other hand can be established. The information system is designed to identify, find and / or provide the remaining components of the operating information as well as a related operating state of the machine when specifying one or more components of the operating information.

The method for providing the information system including generating and / or maintaining the information system comprises several steps. The first step involves operating the machine in a typical operating condition of the machine. The typical operating state is characterized by at least one typical operating parameter of the machine, for example a certain rotational speed and / or a web tension and / or a moisture. In this case, an operating parameter of the machine may have values outside a normal operating point or normal working range. The next step involves determining the at least one characteristic vibration parameter of the engine identifying at least one vibration generated by the engine operating in the at least one typical operating condition. This is followed by a step of receiving operating information including the characteristic vibration parameter of the machine and the operating parameter of the machine in the information system. The steps are repeated for other typical operating conditions of the machine.

When creating the information system, the printing press can be operated either in the normal range or in certain characteristic error states. This can be a characteristic fault condition is that one or more operating parameters of the machine have values outside of a normal operating point or working range and / or characteristics deviating from normal characteristic curves. For example, a characteristic failure condition may be that the press component is operated at 10 percent overspeed, or at high web tension, or too large NIP. In order to establish a fault state, the value of a specific operating parameter may thus be determined outside the operating point or the normal range, wherein the values of the remaining operating parameters may be at the operating point or in the normal range. For example, the spectrum of the measured characteristic vibration of such a malfunctioning printing press component may have typical peaks or other typical patterning.

When creating the information system thus a plurality of operating states is provided, each operating state is clearly characterized or characterized by the respective operating information. The operating states of the machine recorded overall in the information system characterize as completely as possible the operation of the machine. In other words, the number of operating states, which are possible while operating the machine but are not detected in the information system, is minimized.

When generating the information system, therefore, the relevant operating states of the machine are generated, and the characteristic variables of the operating states and the associated operating information are included in the information system. Missing values that can not be generated when generating the information system because they are associated with, for example, serious machine malfunctions can be provided while the machine is in operation. Missing values (so-called "missing values") can also be generated by appropriate statistical methods or by interpolation from the existing values. Missing values can also be determined by means of extrapolation using methods of artificial intelligence from the existing values.

The information system may be a relational or fuzzy database, an artificial neural network, or other system that can receive the operating information and operating conditions of the machine, with access to the information concerning the operating conditions by means of a query or access to at least a part of the operating information is possible.

According to one embodiment, the at least one typical operating state of the machine may be a startup or a shutdown of the machine. The operational information included in the information system includes the characteristic vibration parameter of the engine and the characteristic of the operating parameter of the engine.

Another aspect of the invention relates to a system for monitoring a machine generating at least one vibration, preferably a printing press. The system includes at least one sensor for measuring vibrations, wherein the sensor can convert the vibration into an analog or digital sensor signal. The sensor can be designed as a microphone, acceleration sensor, optical distance meter or deformation sensor. The vibration may be a sound or vibration generated by the engine or by one or more engine components.

The system further comprises at least one actuator for generating at least one countervibration. The countervibration is suitable for attenuating the vibration generated by the machine, wherein the attenuation can be converted by superimposing vibration and countervibration to a superposition vibration measurable with the sensor. For this purpose, an actuator signal is converted by the actuator into the opposite oscillation. The actuator may be formed as a speaker or piezoelectric element, depending on whether sound or vibrations are generated. Actuator may also be understood to mean a multiplicity or a plurality of actuators, for example an actuator array. An orientation or orientation of each of an actuator and / or the directional characteristic of the actuator for radiating the vibration in a desired direction may be fixed or adaptive.

Further, the system includes a processing unit coupled to the sensor and to the actuator that can evaluate the vibration generated by the engine and the overlay vibration to calculate the countervibration and determine an operating condition of the machine by processing the sensor and actuator signals.

The processing unit preferably comprises a digital data processing unit which comprises at least one A / D converter and at least one D / A converter as interface to the sensor and / or actuator or to the sensor / actuator arrays. Preferably, the A / D and / or D / A conversion in the sensor or in the actuator is feasible, whereby the actuator and / or sensor signal is a digital signal.

Fig. 1

das ANC-Prinzip,

Fig. 2

eine Messanordnung für ein ANC-System,

Fig. 3a

ein Signalflussdiagramm für das Überwachen einer Maschine, einschließlich ANC- und NIP-Verhältnis-Regelung, mittels Auswerten einer von der Maschine erzeug- ten Schwingung,

Fig. 3b

eine ANC-Anordnung mit maximal N Sensoren (S), Verarbeitungseinheiten oder Methoden oder Verfahren (V) und maximal M Aktoren (A),

Fig. 4

eine Anordnung von drei Zeitfenstern A, B, C, wobei im Zeitfenster A keine Ab- schwächung der Überlagerungsschwingung durchgeführt wird,

Fig. 5

eine Anordnung von drei Frequenzbereichen A, B, C, wobei im Frequenzbereich B eine Abschwächung der Überlagerungsschwingung durchgeführt wird,

Fig. 6

ein Regelegungssystem der Maschine mit einer Vielzahl von Regelgrößen

The present invention will be explained in more detail by means of exemplary embodiments.
It shows

Fig. 1

the ANC principle,

Fig. 2

a measuring arrangement for an ANC system,

Fig. 3a

a signal flow diagram for monitoring a machine, including ANC and NIP ratio control, by evaluating a vibration generated by the machine;

Fig. 3b

an ANC arrangement with a maximum of N sensors (S), processing units or methods or methods (V) and a maximum of M actuators (A),

Fig. 4

an arrangement of three time windows A, B, C, wherein no attenuation of the superposition oscillation is carried out in the time window A,

Fig. 5

an arrangement of three frequency ranges A, B, C, wherein in the frequency range B a weakening of the superposition vibration is performed,

Fig. 6

a control system of the machine with a variety of controlled variables

Powerful printing presses cause noise due to their processing speed. The more powerful a printing machine is, that is, the faster it is produced, the more noise can be produced.

Large production facilities, such as web-press belt web presses, include machines that produce one part and are set up or serviced to another part. For the furnishing and maintenance personnel, this creates a noise-laden working environment in which only hearing protection should be used.

As a remedy noise barriers can be installed, which are not flexible displaced. Noise barriers are not very suitable for flexible production. Noise barriers or partitions are known as passive noise reduction systems.

Active noise reduction systems are known, for example, from aviation. Battery-operated "sound-absorbing" headphones or actively insulated air ducts can be used here.

An active, also known as Active Noise Control (ANC), noise reduction system, uses the in Fig. 1 principle shown: An oscillation A is superimposed on an antiphase oscillation or countervibration B so that for the superposition oscillation (A + B) a vanishing amplitude results.

The FIG. 2 shows the structure of an ANC system. This comprises at least one sensor or a microphone 14 for detecting the sound, at least one processing unit 28 for processing or analyzing the vibration A detected by the microphone 14 or superposition vibration (A + B) according to FIG FIG. 1 and at least one speaker 16. The output counter-vibration B has the same frequency as the detected vibration A but with a phase angle shifted by 180 degrees. Vibration and counter vibration cancel each other out. An active noise reduction system is particularly suitable for a closed room. A human 12 may hear a sound 121 present in the vicinity of the machine component 10a. The sound signal 121c generated by the sensor or microphone 14 may be an analog or digital signal. The sound signal 121c is input to the processing unit 128.

In contrast to the known ANC systems in copiers and laser printers, which are a comfort application, the aim of the present invention is to minimize or reduce the human disturbing or harmful sound. At the same time, the information contained in the sound produced by the machine should not be lost. In particular, information such as machine speed, pressure ON / DOWN operations, etc. should also be acoustically or audibly perceptible. Such information should, for safety reasons, albeit modified or attenuated Form, be acoustically available to a human around the machine. Furthermore, measurements are carried out which serve to better control the printing process and simplify maintenance.

The FIG. 3a FIG. 12 illustrates a signal flow diagram of active suppression of a sound 121 and a vibration 122 in the vicinity of a machine component 10a, while simultaneously monitoring the machine component 10a by evaluating the sound 121 and / or the vibration 122. The monitoring of the engine component 10a includes a regulation of an N1P ratio.

The machine component 10a, which includes rotating parts or elements, generates a sound vibration 121a and a vibration vibration 122a. In the vicinity of the machine component 10a, an entire overlay vibration 120 may be measured, which includes a sound overlay vibration - in short: sound 121 - and a vibration overlay vibration - in short: vibration 122.

The sound 121 represents a superposition of a sound vibration 121a generated by the engine component 10a, and a sound opposite vibration 121b generated by one or more speakers 18. The sound vibration 121a and / or the sound 121 perceived as superposition vibration can be detected with a microphone 14, whereby a sound signal 121c is generated.

In the vicinity of the engine components 10a, there is further provided a vibration 122 including a vibration vibration 122a and a vibration counter vibration 122b. The vibration vibration 122a and / or the vibration 122 are measured with a strain sensor 18 and converted into a vibration signal 122c. The vibration counter vibration 122b is generated from a counter vibration signal 122 by means of a piezoelectric element 120.

The components of the sound 121, that is, the sound vibration 121a and the sound counter vibration 121b, are mapped to a sound signal 121c and an antinoise signal 122d. Accordingly, the components of the vibration 122, that is, the vibration vibration 122a and the vibration counter vibration 122b are mapped to a vibration signal 122c and a counter vibration signal 122d.

A processing unit 28 is configured to process the signals 121c, 122c for generating a counter sound signal 121d and a counter vibration signal 122d, which are converted to a sound counter vibration 121b and a vibration counter vibration 122b by means of the speaker 16 and the piezoelectric element 20, respectively. The counter vibrations 121b, 122b are adapted to attenuate the sound 121 and the vibration 122 in the vicinity of the engine.

Furthermore, the processing unit 28 is designed to determine from the sound signal 121c and the vibration signal 122c one or more vibration parameters 34b, for example a location-dependent profile of the spectral components, the phase and / or the amplitude of the vibration. The vibration parameter 34b is part of operating information that identifies the operation or operating state of the engine. The operating information further comprises at least one status information 34c, which provides information about a malfunctioning or normal function of the machine via a machine operated in a specific operating state. The operating information also includes an operating parameter 34a, such as a temperature, pressure, or rotational speed of the machine component 10a.

All available operating information is stored in the information system 22. Based on the vibration parameter 34b, the processing unit 28 executes a query in the information system 22, thereby providing the entire operation information including the vibration parameter 34b. As a result, it is advantageously possible to determine the value of an operating parameter which is difficult or impossible to measure in a specific operating state, such as an NIP ratio, or to provide a diagnosis of the machine that can not be generated by other means by means of status information 34c.

The vibration generated by the machine 121a, 122a and / or the superposition vibration 121, 122 are attenuated only partially or incompletely to correct determination of the vibration parameter 34b from the measured superposition vibration 121, 122 to allow. Accordingly, a periodic time window is determined, for example, in which no attenuation of the superposition oscillation 121, 122 is supplied, so that undisturbed or correct determination of the oscillation parameter 34b is possible in this time window. The time window has a typical size of, for example, 0.1 percent or 1 percent to a maximum of 10 percent of the time between two consecutive synchronization signals marking the beginning of two consecutive time slots.

Some operating parameters 34a are measured by sensors. Thus, a temperature of the machine component 10a measured via a temperature sensor 24 is representative of any measurable operating parameter 34a. On the other hand, the operating parameter 34a can also be determined from the information system 22 by means of a query for the vibration parameter 34b. Thus, the sensors can be validated by means of cross-check or, if appropriate, the measurement results of one or more defective sensors can be replaced by values from the information system 22.

In the FIG. 3a is the regulation of a NIP ratio shown. Via a user interface 26, a target NIP ratio 30 is predetermined and supplied to the processing unit 28. This determines from the vibration parameter 34b, via a query in the information system 22, the actual NIP ratio 32. According to the difference between the target and actual NIP ratio 30, 32, those operating parameters 34b which affect the NIP ratio are recalculated , and supplied to the engine component 10a for adjusting the actual NIP ratio 32 to the target NIP ratio 30.

At the same time, the values relevant for the regulation or the operation of the machine, such as, for example, oscillation parameter 34b or actual / nominal NIP ratio 32, 30 are output via the user interface.

The machine of the in the FIG. 2 shown ANC system has rotating machine components 10a. If the noise source has rotating parts, the rotational speeds and angles of rotation can be included in the evaluation. In addition, control signals can be evaluated that indicate certain processes in the machine. With additional signals, for example, control signals, the evaluation can be influenced or a certain behavior of the processing unit 28 and / or output unit can be achieved. Systems without additional information are also conceivable, for example when, as in the case of rotating bodies, the noise and noise levels occur periodically.

Noise suppression systems according to FIG. 2 may include two microphones 14 and a speaker 16. In this case, a first microphone 14 is used to detect the noise source as accurately as possible and a second used to detect the residual noise, for example, the operating personnel. The speaker 16 is controlled so that the residual noise is changed so that an optimal working environment arises. Any configurations with X sensors, Y evaluation units and Z output units are possible ( FIG. 3b ).

With the same device, the transmitter 16 is not absolutely necessary, can be determined by the normal case deviating noise and / or immissions. Such deviations can be used, for example, for the early detection of malfunctions or wear and / or changed process variables.

For example, noise analysis can be used to prevent material damage. It can be used to replace the periodic maintenance case with the identified or measured and required maintenance case. This material and time can be minimized.

For example, the noise analysis may be used to control or provide the ideal color water mixture or water and / or color, or to issue specific messages. The messages may indicate, for example, the exceeding or falling below of certain limit values and their cause. Particular attention is paid, for example, to the development of noise during color separation or water transfer or combined transfer between two rotating bodies.

In this context, the indirect measurement of Abklatsches or NIP between two rotating bodies is possible.

Even a web tension control at any point in the machine is possible. For example, in addition to the audible frequencies, frequencies outside the audible range are also measured and evaluated. In particular, vibrations and noises of paper alone or in cooperation with other printing materials or machine parts can be evaluated.

In order to achieve the above goals, digital signal processing is used. This includes characterization of the acoustic controlled system also called identification, calibration, signal recording, signal processing or regulation and signal output. Here, the signal output can be acoustic and / or other type. The acoustic control system can be adaptive and / or fuzzy-fied and / or build on databases.

Noises are often associated with vibrations. For this reason, it is conceivable to combine the signal recording in the form of acoustic signals with the recording of vibrations. In addition, the noise level can be reduced by the output of acoustic and / or vibration signals. The reduction of noise by targeted delivery of vibrations to mechanical parts can also be used, for example, to reduce mechanical wear. Also, by selectively influencing the process, for example by changing the engine speed, the noise and / or vibration can be reduced. Vibrations can be detected by other non-acoustic measurement methods such as accelerometers or fast optical distance measurements. The availability of printing equipment is increased by the reduction of vibrations. The parts wear can be reduced. Material web breaks can be minimized.

A practical problem with using ANC systems in printing machines is that dirt, paint and water mist clog common microphones, which could lead to system failure. For this purpose, microphones and / or speakers are used, which are made for example of one-crystal-metal alloys and are widely used in clean room technology. Such microphones and loudspeakers, for example, are able to emit sound or to receive vibrations by contact with larger objects such as sheets or glass panes. They are easy to clean and dispose of no or very small openings. Of course, the problem can also be alleviated by suitable arrangement and protection of loudspeakers and microphones.

Reducing noise can be implemented in an entire production hall including ancillary operations. The noise reduction installation can be fixed or movable.

The mentioned changes or differences of the acoustic quantities and / or vibrations can be accomplished particularly well in the spectral range.

By means of a plurality of sensors it is possible to calculate and create a vibration or acoustic map. With such a mapping, distinctive noise and vibration sources can be located and graphically displayed.

The following describes how the projects, which are independent of each other, can be reconciled with opposing objectives - noise reduction and noise evaluation.

At least one sensor for airborne sound and / or body vibrations is provided and at least one processing unit which can have additional signal inputs and at least one output unit for airborne sound or body vibrations. In the case of a plurality of sensors or processing units or actuators, all or parts thereof may be assigned to one or the other sub-function noise suppression or sound evaluation or be switched off. The assignment is made dynamically based on algorithms and methods or external signals in the processing unit and / or between the processing units of the device. The subfunctions are preferably synchronized.

In the FIG. 3b is a possible configuration with a maximum of N sensors (S), processing units or methods or procedures (V) and a maximum of M actuators (A) shown. The mentioned assignment or the synchronization between the subfunctions can be done by way of example in time multiplex, see FIG. 4 , The time division multiplex can be fixed or variable or adaptive. As the process and condition detection by sound evaluation does not necessarily have to be carried out continuously preferably the noise suppression will have a longer duty cycle.

Time division multiplexing means that suppression of sound and / or vibrations is performed within a periodic time window, and no suppression is performed outside the periodic time window.

Another method provides to influence the noise suppression so that at the same time and at least partially or temporarily a noise detection with subsequent analysis is possible. For this purpose, individual frequencies or frequency ranges are not or not attenuated for a short duration, output for the noise suppression. This allows the detection of said frequencies or frequency ranges for noise analysis. Since the information content of individual frequencies or frequency ranges is not sufficient for all applications, a frequency sweep or sequence of frequencies or frequency ranges is successively removed from the noise suppression.

Frequency sweep is understood to mean that the frequency spectrum of the oscillation is traversed, wherein attenuation of the oscillation is performed for predetermined frequency ranges or discrete frequencies.

The process is repeated until the information content of the detected and measured frequencies is sufficient for the intended functions. In this way, the noise suppression is only partially and to a limited extent suspended or suppressed.

In FIG. 5a exemplified is the spectrum of a noise signal. In FIG. 5b it is shown how the spectrum is divided into three areas ABA. The FIG. 5c shows the noise suppression of the frequency range B.

Certain frequencies or frequency ranges are permanently output for the noise suppression not or weakened. The detection of noise in said frequencies is permanently possible, see FIG. 5b , c.

Preferably, synchronization is performed. By synchronization is meant that the beginning and end of the periodic time window are determined by means of synchronization signals.

The synchronization is based on a multiple or fraction of the rotational frequency of a rotating body. Wherein the rotation frequency can be provided only to determine a repetition frequency of a sequence of a time division multiplex or sequence of a frequency domain sampling or frequency sweep. The rotation frequency also gives indications of the expected signal power spectrum. A synchronization in relation to the angular position of a rotary body is also conceivable.

Different remote devices are synchronized so that at any time, for example, the production hall has a minimum and non-interfering noise level in the frequencies.

In one embodiment, only a noise recording and analysis can be performed, for example, during setup and maintenance. By way of example, the apparatus can be used to determine the NIP of water and inking rollers. In one embodiment, the noise of the plate cylinder rotating at a known speed is detected with the roller engaged. In this case, the noise is preferably evaluated when driving over the plate channel.

Adhesive tape, glue or other materials can be applied to the rubber rollers or back pressure adjustment. The noise generated when the adhesive rolls over are used to determine the NIP or NIP range. In another embodiment, the rollers are wholly or partially provided with paint or water.

The information obtained about the NIP can be used to automatically put the NIP in closed loop. The obtained signals and information can also be used to determine the properties of the rubber rollers to be calibrated.

To evaluate the sound signals digital information of the print motifs can be used. Here, the focus is mainly on the area coverage per color and line of a newspaper page or plate. The line is therefore authoritative because, for example, the color separation (in roll rotations) takes place in lines or strips transversely to the direction of paper travel. It thus allows to calculate and estimate the expected noise level. A common file format for print motifs are TIFF-G4 files, which are used for the production of plates.

By using a plurality of microphones and / or vibration sensors, the location of noise sources and noises can be realized. Under certain conditions, vibration sources can also be located.

Elements of the noise suppression devices, methods or methods and elements of the noise evaluation device, method or methods are at least partially identical and / or can be synchronized.

The noise suppression device has airborne and / or structure-borne sound sensors and actuators and / or vibration sensors and actuators.

The vibration sensors are in particular acceleration sensors and / or deformation sensors and / or optical sensors.

Inputs and / or outputs for process variables are provided.

The printing press or parts thereof are supplied with a signal for air and / or structure-borne sound and / or vibrations and / or process variables so that the entire sound or certain frequencies or certain frequency ranges thereof are minimized. The sound minimization takes place permanently or temporarily.

The sound emissions are not or only partially minimized.

The printing press comprises at least one signal recording unit, a processing unit without transmitters with no or at least one signal input and a signal output unit, for minimizing the sound and / or vibrations.

The printing machine comprises at least one processing unit having at least one signal input and a signal output unit for minimizing the sound.

Noise is minimized and additional sonic components are added, giving the operator the full auditory information content of the machine assembly or machine or aggregate or production hall.

The printing press or parts thereof are subjected to a sound signal so that the total sound is minimized while information-containing acoustic signals are not attenuated to the same extent as the noise signals without information content.

The sound and the informational content of the sound are also suitably influenced in locations remote from the machine, for example in a hall or a secondary operation of the printing press, optionally using additional systems for this purpose.

In addition, digital image information of the print motifs is used to evaluate the sound and, in addition, material properties as well as paper, color, plate material, blanket material and rubber roll material properties and / or dimensions are taken into account. Furthermore, mechanical, optical or electrical devices for detecting the material properties and / or dimensions are provided.

Additional process variables are evaluated and influenced.

• Erfassung und Charakterisierung eines Soll- Akustik und/oder Vibrationssignals,
• Speicherung eines Soll-Akustik und/oder Vibrationssignals,
• Messung und Charakterisierung eines Ist-Akustik und/oder Vibrationssignals.
• Vergleich der Soll- und Ist-Signale und Angabe von geeigneten Akustik und/oder Vibrationssignalen.

The method for reducing noise involves the following steps:

• Acquisition and characterization of a target acoustic and / or vibration signal,
• Storage of a desired acoustic and / or vibration signal,
• Measurement and characterization of an actual acoustics and / or vibration signal.
• Comparison of the desired and actual signals and indication of suitable acoustics and / or vibration signals.

Measurement and manual or automatic adjustment of the NIP is accomplished by using the channel roll channel and / or blanket channel channel overrides to determine the NIP between applicator rolls or blankets. The method and / or device evaluates noises and / or vibrations. The roll or rubber blanket or counter-pressure element to be adjusted is dyed or commissioned by other means. The channel overruns of the plate cylinder channel and / or blanket channel are used to determine the NIP and the noise of the material tear is measured and evaluated as it leaves the contact surface.

In addition to the acoustic measurement, the mechanical properties of the rollers are determined and / or used.

Rollers and blankets have additional built-in sensors and / or transmitters and the sensors can preferably be read wirelessly.

The sensors and / or transmitters are designed as pressure-sensitive elements in the roll shell.

Digital image content is used to detect and / or monitor process variables during the printing process.

Water quantity and / or color amount and / or color water balance and / or web tension and / or NIP are determined and / or monitored and / or regulated.

A periodic maintenance case can be replaced by the identified or measured and / or required maintenance case.

The monitoring of the machine relates to monitoring of bearings and / or a Schmitzringschmierung or a Schmitzringzustands or a folder.

The monitoring of the folder relates to monitoring components that are subject to wear such as brushes, springs or cutting device.

A device for issuing warnings and error and status messages is provided.

Non-acoustic measurement methods are used to detect vibrations, such as laser distance sensors and / or acceleration sensors.

The measurements and evaluations are used to influence a process, preferably via the speed and / or web tension.

reference numeral

10

machine

10a

machine components

12

human

A

vibration

B

counteroscillation

120

Local oscillation

121

sound

122

vibration

121

sound vibration

121b

Sound counteroscillation

121c

sound signal

121d

Anti-noise signal

122a

vibration vibration

122b

Vibration counteroscillation

122c

vibration signal

122d

Against vibration signal

14

microphone

16

speaker

18

deformation sensor

20

piezoelectric element

22

information system

24

temperature sensor

26

User Interface

28

processing unit

30

Target NIP ratio

32

Is NIP ratio

34

operating information

34a

Operating parameter or process variable

34b

oscillation parameters

34c

status information

Claims (13)

Method for monitoring a machine (10), which generates at least one vibration (121a, 122a), in particular a printing press, with the steps: a) measuring the at least one vibration generated by the machine (10) (121a, 122a); b) evaluating the at least one vibration (121a, 122a) generated by the machine (10) for calculating at least one counter-vibration (121b, 122b) attenuating at least one or a portion of the vibrations (121a, 122a) generated by the machine (10); c) generating the at least one countervibration (121b, 122b) for at least partially attenuating the vibration (121a, 122a) generated by the machine (10) by superimposing vibration (121a, 122a) and countervibration (121b, 122b) into a superposition vibration ( 121, 122); and d) determining an operating state of the machine (10) and in particular of at least one characteristic vibration parameter (34b) from the superposition vibration (121, 122) for monitoring the machine (10). A method according to claim 1, wherein the superposition vibration (121, 122) is measured and the countervibration (121b, 122b) for attenuating the vibration (121a, 122a) generated by the engine (10) or the superposition vibration (121, 122) depending on the measured superposition vibration (121, 122) is generated. Method according to one of the preceding claims, wherein - The operating state, such as pre-moistening, operating point in the linear or non-linear characteristic range, full load, partial load, idle, accident, partial lack of a train, temperature is too high, characterized by an example designed as a data record or data field operating information (34), wherein the operating information (34) comprises: a) at least one operating parameter (34a) of the printing machine, for example a measured operating parameter (34a), such as a rotational speed, a temperature, a mechanical pressure, a power, or an oil pressure, or one of the oscillation (121a, 122a) or superposition oscillation ( 121, 122) determined operating parameters (34a), such as a web tension, a nip of two rollers, a color split, a Schmitz, and / or b) the at least one characteristic vibration parameter (34b) of the machine (10), such as a fundamental frequency, an amplitude of the fundamental frequency, a first harmonic, a first harmonic amplitude, a frequency response, a phase response, and / or c) status information (34c) of the machine (10) regarding a malfunction or normal function of the machine (10), such as operation of the machine normal or faulty, speed of the engine normal or too high, wear of the rollers normal or too high. Method according to one of the preceding claims, wherein an information system (22), for example a database or a neural network, with operating information (34) according to the preceding claim is provided for determining at least one operating parameter (34a) of the machine (10) and / or status information (34c) of the machine ( 10) starting from at least one characteristic vibration parameter (34b) of the machine (10), by - At least one of the machine (10) generated vibration (121a, 122a) or a superposition vibration (121, 122) is measured; - from the measured values of the vibration generated by the machine (10) (121a, 122a) and / or the superposition vibration (121, 122) at least one characteristic vibration parameter (34b) for monitoring the machine (10) is determined; - at least one operating parameter (34a) of the printing machine and / or status information (34c) of the machine (10) is assigned to the at least one characteristic vibration parameter (34b); - the at least one characteristic vibration parameter (34b) and / or the at least one operating parameter (34a) of the printing press and / or the status information (34c) are combined into operating information (34) and stored in the information system (22); in which - an operating parameter (34a) of the machine (10) and / or status information (34c) are determined by an operating information (34) stored in the information system (22) by means of a query for the at least one characteristic vibration parameter (34b) of the machine (10) is accessed. Method according to one of the preceding claims, wherein the vibration (121a, 122a) generated by the machine (10) and / or the superposition vibration (121, 122) is attenuated only partially or incompletely in the time domain and / or in the frequency domain and / or in the local domain , Method according to one of the preceding claims, wherein a preferably periodic time window is determined in which the vibration (121a, 122a) generated by the machine (10) and / or the superposition vibration (121, 122) is not or only partially attenuated, and - In the time outside the time window, the vibration generated by the machine (10) (121a, 122a) and / or the superposition vibration (121, 122) are attenuated more than in the time within the time window. Method according to one of the preceding claims, wherein the oscillation (121a, 122a) and / or superposition oscillation (121, 122) generated by the machine (10) are dependent on a frequency of the oscillation (121a, 122a) generated by the machine (10). and / or the beat vibration (121, 122) is attenuated. Method according to one of the preceding claims, wherein the countervibration (121b, 122b) is generated such that the oscillation (121a, 122a) and / or superposition oscillation (121, 122) generated by the machine (10) by a predetermined amount, for example by a factor of 0.8 or 0.2 or 0.02 or by 10 dB or by 20 dB, is attenuated, and / or - The vibration generated by the machine (10) (121a, 122a) and / or superposition vibration (121, 122) is attenuated so that at a given location a predetermined damping is present, and / or - At least one specific vibration source, for example, a machine component (10a) is given, the vibration (121a, 122a) is attenuated. Method according to one of the preceding claims, wherein as the operating parameter (34a) of the machine (10) one or more of the following variables is determined: a control signal, for example a temperature, a rotational speed or an engine power, - information to be printed, a material property of a machine component (10a), for example a rubber roller or a plate, or a material used for printing, for example paper, paint or blanket, a mechanical pressure on a roll surface, a kinematic variable, such as rotational angle, rotational speed, rotational acceleration, one or more rotating machine components (10a), a temperature an ON / OFF state. Method according to one of the preceding claims, wherein a malfunction or malfunction of the machine (10) or the machine component (10a) is detected by the fact that the operating information (34), for example an oil temperature, values within a fault range, for example an area outside a minimum and a maximum allowable oil temperature, wherein the disturbance range is a predetermined range of values of the operating information (34) outside a predetermined normal range with, for example, values within the minimum and the maximum allowable oil temperature. Method for providing an information system for monitoring a machine (10), preferably a printing machine, by measuring or determining at least one operating parameter (34a) of the machine (10) and / or status information (34c) of the machine (10) starting from at least one from a measured oscillation (121a, 122a) generated by the machine (10) or from at least one characteristic oscillation parameter (34b) of the machine (10) determined from a measured superposition oscillation (121, 122), and by evaluating and / or changing the at least one operating parameter (34a) of
Machine (10) and / or the status information (34c) of the machine (10), wherein in the information system (22) at least one operating information (34) is stored, the at least one operating parameter (34a) and / or the at least one characteristic vibration parameter (34b) of the machine (10), comprising the following steps: a) operating the machine (10) in at least one typical operating state of the machine (10), which is controlled by at least one typical operating parameter (34a) of the machine (10), for example a specific rotational speed and / or a web tension and / or a moisture, is characterized, in particular an operating parameter (34a) of the machine (10) has values outside of a normal operating point, or normal operating range; b) determining the at least one characteristic vibration parameter (34b) of the engine (10) which identifies at least one vibration (121a, 122a) generated by the engine (10) operated in the at least one typical operating condition; c) storing operating information (34) comprising the characteristic vibration parameter (34b) of the machine (10) and the operating parameter (34a) of the machine (10) in the information system (22). A method according to the preceding claim, wherein the at least one typical operating state of the machine (10) is a startup or shutdown of the machine (10); - The at least one operating parameter (34a) of the machine (10) when raising or lowering the machine (10) has a characteristic which deviates from a normal characteristic curve of the operating parameter (34a); and - the operating information (34) comprising the characteristic vibration parameter (34b) of the machine (10) and the characteristic of the operating parameter (34a) of the machine (10) is recorded in the information system (22). System for monitoring a machine (10) generating at least one vibration (121a, 122a), preferably a printing machine at least one sensor (14, 18) for measuring vibrations (121a, 122a), - At least one actuator (16, 20) for generating at least one counter-vibration (121b, 122b), which for attenuating the vibration generated by the machine (10) (121a, 122a) by superimposing vibration (121a, 122a) and counter-vibration (121b , 122b) to a with the sensor (14, 18) measurable overlay vibration (121, 122) is suitable, and a processing unit (28) coupled to the sensor (14, 18) and the actuator (16, 20) and capable of evaluating the vibration (121a, 122a, 121, 122) measured by the sensor (14, 18), wherein the Processing unit (28) - calculate the countervibration (121b, 122b) for at least partially attenuating the vibration (121a, 122a) generated by the machine (10) and / or the superposition vibration (121, 122), and - Can determine an operating condition of the machine (10) from the vibrations measured by the sensor (121a, 122a, 121, 122).

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