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The interaction between structural component flexibility and the closed-loop servo system primarily determines a large reflector antenna pointing system’s performance; this is especially true for antennas with a low natural frequency. Because of difficulty and high manufacturing costs of the radome, large antennas usually operate under open-air atmospheres. Therefore, large antennas’ pointing performance...
This paper describes a new kind of direct-drive wave turbine, which collects wave energy and part of tide through a specially designed turbine device. We select the appropriate wave theory (Elliptic Cosine wave theory), calculate the torque and power, the total energy of wave, energy conversion efficiency through characterization and stress analysis of the turbine blades. We could draw a conclusion...
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