Abstract: A method of estimating a position of at least a part of a rotor blade of a rotor of a wind turbine during operation of the wind turbine is provided. The rotor blade is deflected due to a deflection motion of the rotor blade towards a tower of the wind turbine and the position is indicative of the deflection. The method includes measuring a first parameter indicative of an absolute and/or a relative position of at least a second part of the rotor blade or of a further rotor blade of the rotor. The method further includes measuring second parameters indicative of an absolute and/or a relative position of at least a third part of the rotor blade or of the further rotor blade of the rotor. The method further includes estimating a state of the rotor blade and deriving the position from the estimated state of the rotor blade.

Abstract: It is described a method of performing deformation and/or orientation analysis of a wind turbine rotor blade, the method comprising: acquiring first position data of a first navigation system probe mounted at the blade to provide position at a first location; acquiring second position data of a second navigation system probe mounted at the blade to provide position at a second location; deriving first direction information at least regarding a relative direction of the first location and the second location based on the first position data and the second position data.

Abstract: A method of controlling a wind turbine having a tower and a rotor at which plural rotor blades are mounted includes: determining, in particular in real time, a damping characteristic of at least one vibration mode related to the wind turbine; and controlling the wind turbine based on damping characteristic.

Abstract: A dynamic vibration absorber includes a frame configured for mounting to a moveable structure; a flywheel mounted on a first shaft; and a first converter adapted to convert a linear displacement of the frame into rotation of the first shaft; including a rotary damper mounted on a second shaft; and a second converter adapted to convert a rotational velocity of the first shaft into a rotational velocity of the second shaft.

Abstract: A method of controlling a wind turbine having a tower and a rotor at which plural rotor blades are mounted includes: determining, in particular in real time, a damping characteristic of at least one vibration mode related to the wind turbine; and controlling the wind turbine based on damping characteristic.

Abstract: A method of controlling a wind turbine having a tower and a rotor at which plural rotor blades are mounted includes: determining, in particular in real time, a damping characteristic of at least one vibration mode related to the wind turbine; and controlling the wind turbine based on damping characteristic.

Abstract: The invention relates to transport and shipping containers for wafers that are processed into semiconductor units. The wafer transport system provides wafer carriers that provide damage protection and particulate protection with minimal contamination of the wafers in the shipper. The invention includes a wafer cushion for cushioning semiconductor wafers that is made of a closed-cell polyethylene material with a surface resistivity of less than 5×107 ohms per square that has less than 1800 ng/g Cl?, 400 ng/g F?/Acetate, 270 ng/g NO3?, 350 ng/g SO42?, and 60 ng/g PO43?ions leachable under moderate conditions. The wafer cushion optimally has no detectable outgassing organics under stringent conditions. The static control properties are the result of carbon that is part of the structure of the material.

Abstract: The invention relates to transport and shipping containers for wafers that are processed into semiconductor units. The wafer transport system provides wafer carriers that provide damage protection and particulate protection with minimal contamination of the wafers in the shipper. The invention includes a wafer cushion for cushioning semiconductor wafers that is made of a closed-cell polyethylene material with a surface resistivity of less than 5×107 ohms per square that has less than 1800 ng/g Cl−, 400 ng/g F−/Acetate, 270 ng/g NO3−, 350 ng/g SO42−, and 60 ng/g PO43−ions leachable under moderate conditions. The wafer cushion optimally has no detectable outgassing organics under stringent conditions. The static control properties are the result of carbon that is part of the structure of the material.