Abstract: The invention relates to a method for controlling the transport of sheets through a printing apparatus, in particular a digital printing apparatus. In the method for controlling the transport of sheets through a printing apparatus, a print queue is set by assigning images to respective sheets, prior to feeding the respective sheets into the transport arrangement. The sheets are then fed into the transport arrangement, and it is detecting whether a double sheet feeding has occurred. Superposed double sheets are deflected to a double sheet box, which is arranged upstream of the at least one print module, and at least those sheets following the superposed double sheet in the transport arrangement, for which an image has already been assigned and which are not in a duplex path, are guided to a waste box, which is arranged downstream of the at least one print module. Finally, the print queue is automatically reset and printing is continued without stopping the printing apparatus.

Abstract: A method for the operation of a wind energy plant with a rotor, which transfers a driving moment to a generator via a drive train, wherein the generator provides a pre-settable generator moment acting opposite to the driving moment and is connectable to a grid, characterised in that after a sudden voltage change in the grid, the generator moment is controlled depending from the phase position of a torsional vibration of the drive train.

Abstract: A method for the operation of a wind energy plant with a rotor, which transfers a driving moment to a generator via a drive train, wherein the generator provides a pre-settable generator moment acting opposite to the driving moment and is connectable to a grid, characterised in that after a sudden voltage change in the grid, the generator moment is controlled depending from the phase position of a torsional vibration of the drive train.

Abstract: For an efficient management of the printing speed in a printing machine, a method has been provided for preparing a profile of a printing speed of a printing machine for printing a plurality of sheets, wherein a print job defining the printing of a plurality of sheets is accepted and analyzed in view of a printing speed for each individual sheet. Subsequently, before printing the sheets of the print job, a profile of the printing speed is prepared for each individual sheet as a function of the printing speed and of the change-over times between different printing speeds of the printing machine. It is also possible to determine the printing speed of the sheet with the lowest printing speed within the print job and, subsequently, adjust a profile of the printing speed for the entire print job to a constant printing speed that corresponds to the lowest printing speed within the print job, with the profile being adjusted before the sheets of this print job are being printed.

Abstract: The invention relates to a printing apparatus and a method for controlling the transport of sheets through a printing apparatus, in particular a digital printing apparatus. The printing apparatus has at least one print module and a transport arrangement defining a direction of transport, arranged for transporting sheets past said at least one print module for printing thereon. In the method for controlling the transport of sheets through the printing apparatus, a print queue is set by assigning images to respective sheets, prior to feeding the respective sheets into the transport arrangement. The sheets are then fed into the transport arrangement, an it is detecting whether a double sheet feeding has occurred.

Abstract: A wind power installation with a rotor, a generator for generating electric power, at least one rotatably mounted rotor blade displaceable about its longitudinal axis for adjusting the angle of attack, and an auxiliary generator for generating electric power for at least one consumer, characterized in that the auxiliary generator produces electricity for a controller for the rotor blade adjustment and for a drive for adjusting the angle of attack of at least one rotor blade at a lower range of rotational speed in comparison to the rotational speed in normal operation, wherein the controller for the angle of attack is controlled or regulated for sustained operation in the range of the rotational speed.

Abstract: The invention is related to a method for rotating a component of a wind energy plant by traversing an adjustment device, wherein the adjustment device comprises at least two adjustment drives, each one thereof having at least one electric motor, for traversing the adjustment device, and wherein during the traversing of the adjustment device, the electric motor of at least one of the at least two adjustment drives is operated at another rotational speed than the electric motor of at least one other of the at least two adjustment drives. Furthermore, the invention is related to a corresponding device.

Abstract: A method for controlling and adjusting a wind power installation having a nacelle displaceable by an azimuth angle, at least one rotor blade displaceable about its longitudinal axis and a power supply in a spinning mode, wherein the method comprises the following steps: a control unit determines an angular position for the nacelle from measured values (v) of wind velocity and wind direction and one or more displacement angles for the at least one rotor blade upon a measured wind velocity exceeding a predetermined speed value (v1*, v2*), at least one azimuth drive fed by the power supply sets the nacelle into the angular position (?) determined by the control unit, and at least one pitch drive fed by the power supply sets the at least one rotor blade into the angular position (?) determined by the control unit, wherein the at least one rotor blade rotates in the set position at a rotational speed within a predetermined range of rotational speed.

Abstract: A method for controlling and adjusting a wind power installation having a nacelle displaceable by an azimuth angle, at least one rotor blade displaceable about its longitudinal axis and a power supply in a spinning mode, wherein the method comprises the following steps: a control unit determines an angular position for the nacelle from measured values (v) of wind velocity and wind direction and one or more displacement angles for the at least one rotor blade upon a measured wind velocity exceeding a predetermined speed value (v1*, v2*), at least one azimuth drive fed by the power supply sets the nacelle into the angular position (?) determined by the control unit, and at least one pitch drive fed by the power supply sets the at least one rotor blade into the angular position (?) determined by the control unit, wherein the at least one rotor blade rotates in the set position at a rotational speed within a predetermined range of rotational speed.

Abstract: A method for the determination of a strain of a wind energy plant (30), with the following steps: presetting an assignment code, which assigns a characteristic value (K) for the strain of the wind energy plant to each pair of variates of a value for a wind velocity and a value for an acceleration of a component of the wind energy plant, determining a value (v?), which represents a measured wind velocity v, determining a value (a?), which represents a measured acceleration a of a component of the wind energy plant, applying the assignment code to the pair, of variates of the value (v?) for the measured wind velocity v and the value (a?) for the measured acceleration a in order to determine the characteristic value (K) for the strain.

Abstract: An apparatus for the lubrication of a roller bearing of a wind energy plant, with a container for lubricant having a chamber, which is divided into a chamber portion for fresh lubricant and a chamber portion for used lubricant through a movable piston, wherein each chamber portion is connected via a line to a lubricant channel passing through the roller bearing.

Abstract: A wind power installation comprising a rotor, a generator for generating electric power, at least one rotatably mounted rotor blade displaceable about its longitudinal axis for adjusting the angle of attack, and an auxiliary generator for generating electric power for at least one consumer, characterized in that the auxiliary generator produces electricity for a controller for the rotor blade adjustment and for a drive for adjusting the angle of attack of at least one rotor blade at a lower range of rotational speed in comparison to the rotational speed in normal operation, wherein the controller for the angle of attack is controlled or regulated for sustained operation in the range of the rotational speed.