Abstract: Present invention relates to a device for reducing vibrations of a vibrating object as well as a method for reducing vibrations, wherein the perturbing vibrations are reduced drastically by induction of counter-forces. In general, vibrations of equal frequency (counter-vibration) as the perturbing vibration are generated. The force generated by the counter-vibration acts onto the vibrating object, whose amplitude of vibration is to be reduced. The phasing of the counter-vibration is antipodal to the vibration to be reduced, preferably the force of the generated counter-vibration is greater than the force being necessary for compensation of the perturbing vibration. The transfer of the force of the counter-vibration onto the vibrating object is affected by means of a magnetorheological or electrorheological material, whereby the absolute value of the transmitted force is adjusted by the magnitude of an applied magnetical or electric field.

Abstract: A system (1) is described for automatically controlling the flight of at least one power wing airfoil (2), comprising first detecting means (3) on board of such power wing airfoil (2) adapted to detect first pieces of information (3a) dealing with at least one position and one orientation in space of the power wing airfoil (2) and accelerations to which the power wing airfoil (2) is subjected; second detecting means (5) on the ground adapted to detect tension on the driving cables (21) of the power wing airfoil (2) and a position of a driving unit (9) counterweight; processing and controlling means (7) adapted to transform the contents of such information (3a, 5a) into a mechanical drive operating on the winches of the driving unit (9) to drive the power wing airfoil (2) along a flight trajectory TV1, TV2, TV3, . . . , TVn maximising a “lift” effect generated on the power wing airfoil (2).