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The increasing integration of wind power generation brings more uncertainty into the power system. Since the correlation may have a notable influence on the power system, the output powers of wind farms are generally considered as correlated random variables in uncertainty analysis. In this paper, the pair copula theory is introduced to describe the complicated dependence of multidimensional wind...
Turbulent drag reduction has an important significance for energy conservation and emission reduction of the engineering fields, such as mechanical transmission and longdistance transport pipeline transportation. The air-oil two-phase flow model of non-smooth surfaces of rotating-stationary disk system was established based on the finite volume method, the volume of fluid method and RNG k-ε turbulence...
Wing rock is a highly nonlinear phenomenon, which is a main limit-cycle oscillation for an aircraft operating at subsonic speeds and high angles of attack. It is a challenge to design a valid controller under the condition that there exists model error and external disturbance. In this paper, a sliding mode disturbance observer based on homogeneity is proposed to improve the disturbance estimate performance...
Printed Spiral Coil (PSC) is a coil antenna for near-field wireless power transmission to the next generation implant medical devices. PSC for implant medical device should be power efficient and low electromagnetic radiation to human tissues. We utilized a physical model of printed spiral coil and applied our algorithm to design PSC operating at 13.56 MHz. Numerical and electromagnetic simulation...
The cylindrical overlapping piezoelectric transducer is mainly composed of the three cylindrical piezoelectric ceramics, bracket, metal bolt, rubber, waterproof layer and output cable. The transducer model was established, separately in the air and water, with ANSYS to calculate the vibration frequency and conductance .The transmitting response and directivity in water were also calculated .The results...
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