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Steady Glide Dynamic Modeling and Trajectory Optimization for High Lift-to-Drag Ratio Reentry Vehicle

机译：高升阻比再入车辆稳态滑行动力学建模和轨迹优化

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摘要

Steady glide trajectory optimization for high lift-to-drag ratio reentry vehicle is a challenge because of weakly damped trajectory oscillation. This paper aims at providing a steady glide trajectory using numerical optimal method. A new steady glide dynamic modeling is formulated via extending a trajectory-oscillation suppressing scheme into the three-dimensional reentry dynamics with a spherical and rotating Earth. This scheme comprehensively considers all factors acting on the flight path angle and suppresses the trajectory oscillation by regulating the vertical acceleration in negative feedback form and keeping the lateral acceleration invariant. Then, a study on steady glide trajectory optimization is carried out based on this modeling and pseudospectral method. Two examples with and without bank reversal are taken to evaluate the performance and applicability of the new method. A comparison with the traditional method is also provided to demonstrate its superior performance. Finally, the feasibility of the pseudospectral solution is verified by comparing the optimal trajectory with integral trajectory. The results show that this method not only is capable of addressing the case which the traditional method cannot solve but also significantly improves the computational efficiency. More importantly, it provides more stable and safe optimal steady glide trajectory with high precision.
机译：对于高升阻比的再入飞行器来说，平稳的滑行轨迹优化是一个挑战，因为它具有弱阻尼的轨迹振荡。本文旨在通过数值优化方法提供稳定的滑行轨迹。通过将轨迹振动抑制方案扩展到具有球形和旋转地球的三维折返动力学中，建立了新的稳态滑行动力学模型。该方案综合考虑了影响航迹角的所有因素，并通过以负反馈形式调节垂直加速度并保持横向加速度不变来抑制轨迹振荡。然后，基于该建模和伪谱方法，对滑行轨迹进行了优化研究。以有无银行逆转的两个例子为例，对新方法的性能和适用性进行了评估。还提供了与传统方法的比较以证明其优越的性能。最后，通过比较最优轨迹与积分轨迹，验证了伪谱解的可行性。结果表明，该方法不仅可以解决传统方法无法解决的问题，而且可以大大提高计算效率。更重要的是，它提供了更稳定和安全的高精度稳定滑行轨迹。

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  • 来源
    《International journal of aerospace engineering》 |2016年第1期|3527460.1-3527460.14|共14页
  • 作者

    Yang Liang; Chen Wanchun; Liu Xiaoming; Zhou Hao;

  • 作者单位

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

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