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- W2247402698 abstract "n this paper, an approach to estimate the dynamic characteristics of a rotatingblade using response data is proposed. A test campaign devoted to demonstrate the capabilityof the Smart Spring device to alter the dynamic properties of the rotating blade is carried out inthe framework of the Smart Hybrid Active Rotor Control System, SHARCS, project. Within thisproject, the key factor is an active vibration control concept that uses piezoceramic actuators topreferentially vary dry friction and stiffness of a structure. This device, if located at the bladeroot, could adaptively vary the dynamic stiffness of the blade to change its flexural characteristics,thus allowing control of the aeroelastic response of the entire blade. In this paper it is shown howthe modal parameters will be estimated from the time histories recorded, by a distributed arrayof sensors, at different rotational speed of the blade and for different values of the stiffness of theSmart Spring device. Both time domain and frequency domain methods were applied in orderto quantify the effects on the modal properties of different operating conditions of a prototypeversion of the Smart Spring device. This device was attached to the push rod of an Active TwistRotor blade developed at the German Aerospace Center (DLR). From the performed experimentalinvestigation, carried out at the DLR’s whirl tower test facility, it was possible first to draw thetypical fan plots of the rotating blade, from which useful information about the dynamic behaviorof the system could be achieved. Then, a validation of the numerical model of the smart springdevice was obtained." @default.
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- W2247402698 date "2009-05-01" @default.
- W2247402698 modified "2023-09-23" @default.
- W2247402698 title "Identification of the Dynamic Properties of Active Twist RotorModel Blade Using Output-Only Data" @default.
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