Abstract: A control method for a wind turbine, in particular for a wind turbine blade is described. The control method makes use of the blade mode shapes, or natural vibration shapes, of the blade to detect the excitement level of the blade natural vibrations, and controls active lift devices on the blade in an effort to reduce the excitement levels, to reduce loading in the blade and the overall wind turbine structure. There is also provided a method of designing a wind turbine blade for use in such a method.

Abstract: A motor suspension for fans has an air grille with radially extending braces and grille rings that are positioned coaxially to each other and are connected to each other by the radially extending braces. For adapting the motor suspension to a vibration behavior of a fan, at least one of a feature selected from a number of the braces and a diameter of the braces is varied to effect a reduction of acoustic noises and/or natural resonances of the motor suspension. The number of the braces that are preferably made of metal is preferably unequal to the number of vanes of the fan.

Abstract: A blade (10) for a rotor of a wind turbine having a profiled contour divided into: a root region (30), an airfoil region (34), and a transition region (32) between the root region (30) and the airfoil region (34). A shoulder (40) is located at the boundary between the transition region (32) and the airfoil region (34). The blade's profiled contour comprises a local relative thickness defined as the local ratio between a maximum profile thickness (t) and the chord length (c). The ratio between the shoulder width (W) and the blade length (L) being less than or equal to 0.075, and the relative thickness (t/c) in a blade length interval of 0-0.8 L is at least 22%.

Abstract: A manufacturing method is described for a wind turbine blade, where layers of fibre material are laid up in a mould to form a portion of the blade structure. The fibre layers are infused with a resin which is subsequently cured to form the hardened blade structure. Some of the layers of fibre material are arranged so that a portion of the layers are kept resin-free during the infusion and curing steps, so that the fibre layer extends freely out from the external surface of the blade, preferably at the blade trailing edge, to provide a flexible blade trailing edge to reduce blade operational noise.

Abstract: A fastening device includes a support element placed on a vehicle wall, a retaining element having a retaining wing for fastening the device in an opening of the wall, and a sealing element between the support and retaining elements. The retaining element is rotatable relative to the support element along a rotation path, e.g. by a bayonet-type movement. The support element, the retaining element and/or the sealing element are designed such that a play remains between the support element, the retaining element and/or the sealing element in a first section of the rotation path, and such that the support element and/or the retaining element move(s) relative to the sealing element so as to eliminate the play at the end of the rotation path, whereby the sealing element is sealingly compressed between the support element and the retaining element, thus sealing the fastening device.

Abstract: A control method for a wind turbine, in particular for a wind turbine blade is described. The control method makes use of the blade mode shapes, or natural vibration shapes, of the blade to detect the excitement level of the blade natural vibrations, and controls active lift devices on the blade in an effort to reduce the excitement levels, to reduce loading in the blade and the overall wind turbine structure. There is also provided a method of designing a wind turbine blade for use in such a method.

Abstract: A mixture has 80-20% by weight of an alkylpolyglucoside surfactant containing 1-2 glucoside moieties and a hydrocarbon moiety, 20-80% by weight based on the alkylpolyglucoside surfactant weight of an alcohol-group containing second surfactant other than an alkylpolyglucoside, and a polymeric additive containing at least one water-soluble moiety and at least one hydrophobic moiety, (i) the polymeric additive hydrophobic moiety having a maximum 1000 g/mol number average molecular weight and the number average molecular weight ratio of all water-soluble moieties to all hydrophobic moieties being 2:1-1000:1, (ii) the polymeric additive being an amphiphilic comb polymer the backbone of which has two or more side chains attached, which side chains have an amphiphilic character distinguished from one another and/or from the backbone, or (iii) the polymeric additive being an AB diblock copolymer or an ABA or BAB triblock copolymer with water-soluble A blocks and hydrophobic B blocks.

Abstract: A blade (10) for a rotor of a wind turbine having a profiled contour divided into: a root region (30), an airfoil region (34), and a transition region (32) between the root region (30) and the airfoil region (34). A shoulder (40) is located at the boundary between the transition region (32) and the airfoil region (34). The blade's profiled contour comprises a local relative thickness defined as the local ratio between a maximum profile thickness (t) and the chord length (c). The ratio between the shoulder width (W) and the blade length (L) being less than or equal to 0.075, and the relative thickness (t/c) in a blade length interval of 0-0.8L is at least 22%.

Abstract: The invention relates to a fastening device for fastening an assembly (5) in an opening (1.1) of a wall (1) of a vehicle. Said fastening device comprises a support element (2) to be placed on the wall (1) and a retaining element (3) having at least one retaining wing (3.1) for fastening the fastening device in the opening (1.1) of the wall, which retaining element (3) for fastening the fastening device is arranged so as to be rotatable relative to the support element (2) along a predetermined path of rotation. This means fastening is achieved by way of a bayonet-type rotational movement. According to the invention, however, a sealing element (4.1) is interposed between the support element (2) and the retaining element (3), and the support element (2) and/or the retaining element (3) and/or the sealing element (4) are designed relative to one another such that in a first section of the path of rotation, a play (4.

Abstract: A motor suspension for fans has an air grille with radially extending braces and grille rings that are positioned coaxially to each other and are connected to each other by the radially extending braces. For adapting the motor suspension to a vibration behavior of a fan, at least one of a feature selected from a number of the braces and a diameter of the braces is varied to effect a reduction of acoustic noises and/or natural resonances of the motor suspension. The number of the braces that are preferably made of metal is preferably unequal to the number of vanes of the fan.

Abstract: Disclosed is a method for improving efficacy of surfactants, prevention of lamellar mesophases, temperature stabilization of the single phase region and a method for reducing boundary surface tension in micro-emulsions containing silicone oils by means of additives and a surfactant/oil mixture. The above effects are achieved, whereby an additive of a block copolymer with a water-soluble block A and a block B which is either a polyalkylene oxide with at least 4 C atoms in the monomer component or a polydiene or a partially or completely hydrogenated polydiene or polyalkane, is added to the micro-emulsion.

Abstract: A fuselage structure comprises a plurality of elements that in longitudinal direction are interconnected by weld joints; a plurality of circumferential ribs that are connected to the plurality of elements and that extend so as to be substantially perpendicular in relation to the longitudinal direction of the elements; and a plurality of clips that are arranged between the elements and the ribs such that said clips do not cover the respective weld joints.

Abstract: A mixture comprising a component I comprising 80-20% by weight of a first surfactant component I1, which is an alkylpolyglucoside containing 1-2 glucoside moieties and a hydrocarbon moiety, especially an alkyl residue of 6-16 carbon atoms, 20-80% by weight of a component I2, which is a second surfactant containing alcohol groups other than an alkylpolyglucoside, the weight proportions being based on component I only; and a polymeric additive as component II, wherein the polymeric additive, as component III, contains at least one water-soluble moiety and at least one hydrophobic moiety, the ratio of the number average molecular weights of all water-soluble moieties to the number average molecular weights of all hydrophobic moieties being from 2:1 to 1000:1 or from 3.

Abstract: A method for increasing the efficiency of surfactants, broadening the temperature window, and suppressing lamellar mesophases in microemulsions by use of additives that possess at least one water-soluble unit and one hydrophobic unit are added to the microemulsions. The ratio of the number-average molecular weight of water-soluble units to the number-average molecular weight of hydrophobic units is 2 to 1000, the additives being polymers that comprise at least one water-soluble unit that possesses at least one hydrophobic unit on one chain end and/or one hydrophobic unit as a non-terminal substituent and/or at least one hydrophobic unit that is incorporated between the water-soluble units of the polymer.

Abstract: The invention relates to a method for improving the efficiency of surfactants with the simultaneous suppression of lamellar mesophases, in particular in micro-emulsions and emulsions and to surfactants, which are mixed with an additive. According to the invention, to improve the efficiency of the surfactants, a block copolymer of type AB, ABA or BAB is added to latter, said polymer comprising a water-soluble block A and an oil-soluble block B, which is a polyalkylene oxide, whose monomer units contain at least 4 carbon atoms. Said block copolymers also prevent lamellar mesophases, stabilise the temperature of the one-phase ranges for oil, water or surfactant mixtures, enlarge the structural quantity and reduce the interfacial tension of said mixtures.

Abstract: Disclosed is a method for improving efficacy of surfactants, prevention of lamellar mesophases, temperature stabilization of the single phase region and a method for reducing boundary surface tension in micro-emulsions containing silicone oils by means of additives and a surfactant/oil mixture. The above effects are achieved, whereby an additive of a block copolymer with a water-soluble block A and a block B which is either a polyalkylene oxide with at least 4 C atoms in the monomer component or a polydiene or a partially or completely hydrogenated polydiene or polyalkane, is added to the micro-emulsion.

Abstract: A fuselage structure comprises a plurality of elements that in longitudinal direction are interconnected by weld joints; a plurality of circumferential ribs that are connected to the plurality of elements and that extend so as to be substantially perpendicular in relation to the longitudinal direction of the elements; and a plurality of clips that are arranged between the elements and the ribs such that said clips do not cover the respective weld joints.

Abstract: A sensor front end is disclosed that is able to discriminate objects based on their range from the sensor and to derive bearing information therefrom. The sensor system includes a signal source for transmitting at least a first and a second sensor signal toward the object and receiving a first and a second reflected signal pulse therefrom, and for generating a first and second information signal based on the first and the second reflected signals, respectively; and an information processor programmed to receive the first and second information signal from the signal source and to determine bearing information for the object based on a phase difference between the first and second information signal. The information processor is preferably capable of generating sample points from the first and second information signal and calculating the bearing information using these sample points.

Abstract: An apparatus for the grinding or polishing of cylindrical (telescopic) or conical primary crown castings, which as tooth replacements are to be mounted in appropriate anchoring members and which have pins extending from their top sides in axial alignment with the centerlines of the castings, includes a base having a support column extending upwardly therefrom and supporting an electric motor having a shaft with a grinding or polishing disc mounted thereon and a crown casting receptacle is rotatably so supported on the base that its angle relative to the base is adjustably lockable and, locked at a given angle, it is movable toward the grinding disc for engagement of the casting with the grinding disc so as to be abraded at a desired angle the motor and grinding disc being surrounded by a shroud forming an air flow space in communication with the interior of the support column which also has a suction nozzle adapted to be connected to a suction line for the removal of grinding and polishing dust through the ai