Abstract: In a method for controlling a compression installation (1), the installation has at least two compressor units (i=1, , N) that can be separately turned on or off, a plurality of devices for modifying the output of the compressor units and a control device (10). Known methods and devices do not function optimally in terms of the power consumption of the entire compression installation. The power consumption (EG) for the operation of a plurality of compressor units (i=1, , N) of a compression installation (1) can be optimized by calculating a novel circuit configuration (Si, t) and automatically adjusting the novel circuit configuration (Si, t) by a control device (10).

Abstract: In a method for controlling a compression installation (1), the installation has at least two compressor units (i=1, , N) that can be separately turned on or off, a plurality of devices for modifying the output of the compressor units and a control device (10). Known methods and devices do not function optimally in terms of the power consumption of the entire compression installation. The power consumption (EG) for the operation of a plurality of compressor units (i=1, , N) of a compression installation (1) can be optimized by calculating a novel circuit configuration (Si, t) and automatically adjusting the novel circuit configuration (Si, t) by a control device (10).

Abstract: A direct drive (21) for a cylinder (1) comprises a hollow shaft (2). The direct drive comprises a drive housing (7) in which at least one rotor device (9) and at least one stator device (11) are arranged. According to the invention, the stator device (11) is connected to the drive housing (7), auxiliary substances and/or operating substances such as oil, coolant or vapour are supplied to the cylinder (1) through the hollow shaft, the hollow shaft (2) is guided through the drive housing (7) preferably without bearings, and the rotor device (9) is directly connected to the hollow shaft (2). The inventive drive (21) is especially maintenance-free and compact and especially used for a rotating cylinder (1) in the paper industry, without gearboxes and clutches, and with direct supply or discharge of auxiliary substances and/or operating substances. The rotor device (9) at least partially surrounds the hollow shaft (2).

Abstract: Rolls of paper comprise individual layers of paper under differing degrees of tension, lying on top of each other. The aim of the invention is to measure the resulting winding tension, which varies along the radius, whereby physical interactive effects can be measured. Said aim is achieved, whereby ultrasound is irradiated in the region of the top face of the roll of paper and the resulting ultrasound recorded, after interacting with the laminated paper sheets. The interactive effects are a criterium for the winding tension. The corresponding device is an ultrasound measuring system provided with at least one ultrasound transmitter (10, 20, 30, 40, 50, 60, 70, 80, 110) and at least one ultrasound receiver (10, 20, . . . 120), which may be placed upon and moved along the top face (2) of the paper roll (1).

Abstract: A method for modeling a paper winding device, particularly for modeling a tambour drum cutter. Influencing and control quantities are determined at a real paper winding device and are stored dependent on time. Said quantities are used to determine the web strength depending on the wound number of layers or, respectively, or a correlative quantity is used as a target quantity along with the other relevant control and influencing quantities to enable a neural network to be trained as a model for a nip (Ni) for this winding device. New data for training the network can be continually obtained during the operation of the arrangement, thereby improving the model. Optimal control parameters can be determined for various production requirements by means of an iterative process dependent on the winding quality, which can also be determined from the web strength.

Abstract: When winding a paper web, in order to achieve a constant reeling layer thickness, which represents a significant quality parameter in the production process of paper, the line force or the web tension of the paper is corrected as an influencing force. Using measurements, the relationship between force and layer thickness is determined and used to set a controller. In winding devices, winding from the parent reel generally takes place on a winding station, so that the invention makes use of the relationship between the winding and unwinding operation to the effect that the change in the layer thickness is measured and these measured values are used to train a predictor. In continuous operation, in order to regulate a paper winding device, a measured variable which can be registered is measured, and this measured variable is used to determine the layer thickness change or another correlated quality parameter.