科研之友
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摘要
A three-dimensional model is established for a stratospheric tethered balloon. The significance of parameter sensitivity analysis from the perspectives of system optimization design and flight test characteristics is discussed. The method of parameter sensitivity analysis from the two aspects is proposed and conducted for the tether normal aerodynamic coefficient, balloon resistance coefficient, and balloon lift coefficient. The analysis results show that reduction of the normal tether aerodynamic coefficient can significantly improve the maximum safety factor of the tether in the system optimization design, meanwhile reducing the tether tension and improving the wind-resistant capability of the system in the flight test. The balloon resistance coefficient and balloon lift coefficient do not improve the maximum safety factor of the tether in the design stage, while change in the parameters will affect the safety of the cable and wind-resistant capability in the flight test.
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