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As the representative of hypersonic vehicles in the near space,X-51A and HTV-2 with characteristics of high speed and irregular acceleration often adopt the way of nonballistic maneuver flight, which cannnot make an accurate estimation of state of motion. This paper focuses on four typical nonballistic maneuver models of near space targets, proposes a kind of new Modified Variable Structure Interacting...
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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