Abstract It is a challenge to achieve fast altitude control for hypersonic flight due to the inherently insufficient sensitivity of air density to the near-space altitudes. A dominant open-loop feedforward term and a minor altitude error correction term are combined together to obtain the elevation angle command in this paper. A cascade control strategy is used to calculate the elevation command while ensuring the attitude stability. Moreover, an extended state observer is employed to achieve precise and robust attitude control simultaneously, and a stability margin tester is used to tune the controller explicitly. Extensive simulations are conducted to validate the effectiveness, robustness and measurement noise sensitivity of the proposed method.

中文翻译：

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一种高效的高超音速飞行器快速高度控制

摘要 由于空气密度对近空高度的固有敏感性不足，实现高超音速飞行的快速高度控制是一个挑战。本文将显性开环前馈项和次要高度误差校正项组合在一起以获得仰角命令。在保证姿态稳定性的同时，采用级联控制策略计算仰角指令。此外，采用扩展状态观测器同时实现精确和鲁棒的姿态控制，并使用稳定性裕度测试仪来明确调整控制器。进行了广泛的模拟以验证所提出方法的有效性、鲁棒性和测量噪声敏感性。