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Control of the horizontal position of a stratospheric airship during ascent and descent

机译：在上升和下降期间控制平流层飞艇的水平位置

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摘要

A stratospheric airship flies at a working altitude of 20km when it takes off from the ground. During ascent and descent, the wind field and thermal environment are highly complex. The thermal environment affects altitude, whereas wind influences the horizontal position of the airship. At a low altitude, this horizontal position cannot be controlled by thrusts given the low thrust-to-weight ratio, especially under a large wind field. However, it may be controlled indirectly by the pitch angle during ascent and descent with a certain vertical velocity. This study therefore proposes ascending and descending schemes for a stratospheric airship based on the thermal model. In this model, altitude is determined by the net lift/weight, whereas the horizontal position is controlled by the thrust and pitch. The pitch angle is determined by ballonets and an elevator. To allocate pitch control between the ballonets and the elevator under different airspeeds, pseudo-inverse dynamics of varied weight are introduced. In horizontal position control, the method of chain allocation is then applied between a pitch angle and vectored thrust to control the position of a stratospheric airship during ascent/descent.
机译：平流层飞艇从地面起飞时会以20公里的工作高度飞行。在上升和下降期间，风场和热环境非常复杂。热环境影响高度，而风影响飞艇的水平位置。在低海拔情况下，由于推力重量比低，尤其是在大风场下，该水平位置无法通过推力控制。但是，可以在上升和下降过程中以一定的垂直速度间接控制俯仰角。因此，本研究提出了基于热模型的平流层飞艇的上升和下降方案。在此模型中，高度由净升力/重量决定，而水平位置由推力和俯仰角控制。俯仰角由芭蕾舞和电梯确定。为了在不同的空速下分配芭蕾舞和电梯之间的俯仰控制，引入了重量可变的伪逆动力学。然后在水平位置控制中，在俯仰角和矢量推力之间应用链条分配方法，以控制上升/下降期间平流层飞艇的位置。

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  • 来源
    《The Aeronautical Journal》 |2015年第1214期|523-541|共19页
  • 作者

    Chen L.; Zhou H.; Wen Y. B.; Duan D. P.;

  • 作者单位

    Shanghai Jiao Tong Univ, Dept Aeronaut & Astronaut, Shanghai 200030, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Aeronaut & Astronaut, Shanghai 200030, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Aeronaut & Astronaut, Shanghai 200030, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Aeronaut & Astronaut, Shanghai 200030, Peoples R China;

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