Abstract The two-section rotor needs to go through multiple critical speeds in the process of speed increase. When approaches speed, its amplitude increases rapidly, easily causing collision damage. auxiliary over-critical device cushions and protects rubbing, which makes it pass under safe amplitude. In this paper, influence buffer stroke, key structural parameter device, on dynamic response a...

In the projects Smartblades and 2 a full-scale 20 m rotor blade for NREL CART3 wind turbine was designed, built tested. The intended to have strong bending–torsion coupling. By means of experiments, proof technology in question supposed be provided. experimental work accompanied by simulations. aim paper describe publish reference finite element model blade. validation procedure is presented, a...

The effects of lobe tip design parameters on compressor performance were evaluated by utilizing a computer simulation package and taking SRM-D asymmetric type rotor profile as an example. The result suggests that the requirements for high efficiency, large capacity, low inter-rotor contact force and low viscous friction loss do not always lead to the use of the same lobe tip designs. Of all the...

Results of numerical and experimental investigations a novel inertial piezoelectric rotary type motor based on low profile stator with trapezoidal waveguides. The proposed has simple design is well scalable. Moreover, the allows mount it printed circuit board use in small-size mobile positioning actuating systems. structure square hollowed steel frame four straight waveguides that are used to t...

Abstract In this paper, we study experimentally the fluid-structure interaction of a simplified small-scale rotor operating in water channel. The consists single untwisted rectangular blade and is tested with various pitch angles at different rotation speeds free stream velocities. Flapwise deformations are measured using image processing, flow fields obtained by Particle Image Velocimetry. exh...

In the rotor reference frame, the input-output linearization theory was adopted to decouple the rotor position and rotor flux. We then designed two adaptation laws to estimate the rotor resistance and mechanical parameters of the motor. The passive properties of the negative feedback connection from the rotor flux observer to the rotor resistance estimator, and the position controller were anal...

A rod fastening rotor is the core component of gas turbines, which affects working stability and service life whole machine. The characterization contact mechanism a joint’s interface key problem in dynamic prediction. aim this paper to gain insight into influence on characteristics system. According equivalent bending stiffness interface, natural frequency system obtained by analytical method,...