[Study on weightlessness dynamics simulated by neutral buoyancy in air-driven shell].
OBJECTIVE: To provide theoretical support for weightlessness experiment simulated by neutral buoyancy. METHOD: An air-driven shell structure was simplified into a rigid body with constant mass and variable volume. Then, rigid body dynamic model and gasdynamic model of air-driven spherical shell were established. Finally, the kinematical laws and the residual pressure variety laws of air-driven spherical shell were obtained under constant mass-flux condition by computer simulation. RESULT: Under constant mass-flux condition, neutral buoyancy balance of air-driven spherical shell was unstable. CONCLUSION: The key to achieve stable neutral buoyancy balance is the design of the system controller.
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