摘要:
Device and process for oscillation insulation in a transmission path. The device includes a first body structured and arranged to undergo an oscillation movement, at least one rigid connection element, a second body connected to the first body via the at least one rigid connection element, and an actuator device attached to the at least one connection element. A sensor unit is arranged in an interface area of the at least one connection element, and a regulator unit, connected to the sensor unit, is arranged to control the actuator device to perform an elastic deformation equivalent to an oscillation movement of the first body. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
摘要:
Device and process for oscillation insulation in a transmission path. The device includes a first body structured and arranged to undergo an oscillation movement, at least one rigid connection element, a second body connected to the first body via the at least one rigid connection element, and an actuator device attached to the at least one connection element. A sensor unit is arranged in an interface area of the at least one connection element, and a regulator unit, connected to the sensor unit, is arranged to control the actuator device to perform an elastic deformation equivalent to an oscillation movement of the first body. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
摘要:
Noise generated by a noise radiating surface is actively suppressed by at least two axially sensitive noise sensors which produce a control signal for controlling a noise suppression actuator. The sensors integrate the sensed signal in an axially selective manner. The at least two sensors are sensing the signal in two directions which preferably cross each other orthogonally. The control signal activates the actuator in such a way that the actuator counteracts deflections or vibrations of the noise generating surface such as a vehicle body wall.
摘要:
Body or structural noise transmitted through a connector such as a strut, that connects a noise source, such as an engine, to an enclosure, such as a passenger cabin or cell of a helicopter, is suppressed by at least one piezoactuator which is excited to counteract any vibrations of the strut caused by body noise so that body noise vibrations are cancelled or at least substantially suppressed. The excitation of the piezoactuator is controlled in closed loop fashion in response to feedback signals from a sensor secured to the connector.
摘要:
A method of manufacturing hollow bodies including inserting into spaced mold halves of a blow mold of a blow molding machine plastic hose-shaped blanks at an extrusion station of the blow molding machine and closing the blow mold, displacing the closed blow mold from the extrusion station to a calibration station of the blow molding machine, inserting thereat blow mandrels into respective cavities of the closed blow mold, lifting, after expiration of predetermined blow time, the blow mandrels, together with the blown hollow bodies to an intermediate position and removing the blown hollow bodies from the blow mandrels lifting the blow mandrels to their initial position thereof, and displacing the blow mold from the calibration station to the extrusion station, with the displacing of the blow mold between the extrusion station and the calibration station being effected by displacing the blow mold at a right angle to a connection line of arranged side-by-side cavities of the blow mold.
摘要:
A method and an apparatus for closing the tool of a plastics-processing machine, especially a blow-molding machine, concerns a two-part tool (1, 2) which is supported by two tool mounting plates (3, 4), at least one run drive (5), at least two closure drives (8), and such that the closure drives (8) each have a hydraulic piston-cylinder system with a cylinder (9), a piston (10), and a cylinder rod (11), and such that an inflow (14) and an outflow (15) for hydraulic oil is situated at the cylinder (9). Also, the end of the piston rod (11) has an interlock element (12) which interacts with a counter-piece (13), such that the piston rod (11) does not interlock with the closure piece (13), in order to apply the closure force, until the tool (1, 2) is situated near its closed position. According to the invention, all the closure drives (8) for closing the tool (1, 2) with a high force are actuated by a common control or regulation mechanism; no synchronization devices between the individual closure drives 8 are present. The entire closure motion of the tool (1, 2) takes place continuously and without interruption of the closure process. In this way, a more economical mode of operation is achieved by a simpler and more economical design.
摘要:
The present invention relates to an acoustic absorber that is particularly suitable for aircraft engines and has a honeycomb-shaped 3-dimensional structure, which absorbs engine noise when used in an engine. The structure has a plurality of folded honeycomb structures formed by folding a flat semi-finished product.
摘要:
A device for reducing structural vibrations of aerofoils in an aircraft comprises, in the region of the aerfoil tips, at least one force generator (24a) acting substantially in the direction of movement of the vibrations. This arrangement has the advantage that such a force generator (24a) is considerably less susceptible to wear than conventional aerodynamic flaps and therefore effective vibration damping is possible with a reduced outlay on maintenance and greater efficiency.
摘要:
Minimizing dynamic structural loads of an aircraft, introduced by an external excitation, which, includes generating a signal (x) indicative of the external excitation; deriving signals (y) of pre-controlling for actuating control elements of the aircraft from the excitation indicating signal (x) in accordance with a pre-controlling rule, so as to reduce the dynamic structural loads introduced to the aircraft; generating an error signal (e, e*) representing performance of said pre-controlling; optimizing the pre-controlling rule by the error signal (e, e*) and/or the excitation indicating signal (x) so as to minimize the dynamic structural loads.
摘要:
Minimizing dynamic structural loads of an aircraft (2), introduced by an external excitation (1), which, comprises generating a signal (x) indicative of the external excitation (1); deriving signals (y) of pre-controlling for actuating control elements of the aircraft (2) from said excitation indicating signal (x) in accordance with a pre-controlling rule, so as to reduce the dynamic structural loads introduced to the aircraft (2); generating an error signal (e, e*) representing performance of said pre-controlling; optimizing the pre-controlling rule by said error signal (e, e*) and/or said excitation indicating signal (x) so as to minimize the dynamic structural loads.