高超飞行器的再入非线性鲁棒控制
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江苏大学高级专业人才科研启动基金项目(10JDG074)


Re-entry nonlinear robust control law for hypersonic vehicles
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    摘要:

    针对再入段高超飞行器非线性动力学模型存在不确定性和干扰,基于奇异摄动理论提出了鲁棒变结构+动态逆内外环解耦控制方法.为避免在线实时求逆,控制系统的外环基于简化的模型设计自适应滑模变结构控制律,通过反馈干扰观测器在线估计广义干扰量,实现角度的跟踪和闭环系统的稳定,抑止外来干扰.强耦合的姿态动力学内环采用动态逆跟踪角速度指令,期望动力学采用PI 形式提高内环的鲁棒性.最后,通过仿真验证了所提算法的有效性.

    Abstract:

    A robust variable structure control plus dynamic inversion method was presented for nonlinear reentry attitude dynamics of hypersonic vehicles under model uncertainties and external disturbances. The dynamics is separated into fast and slow loops as angular velocity and attitude angular in terms of singular perturbation theory. Outloop gets the control laws based on adaptive variable structure control theory of reduced model without inversion computation, the disturbances observer is to compensate the generalized disturbances, to improve robustness and guarantee stability of closedloop systems. Inloop system is affine in control, the decoupling controller based on nonlinear dynamic inversion and state feedback is designed, the desired dynamics is proportional plus integral dynamics form. Lastly, Simulation result demonstrates the effectiveness of the proposed method.

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张军,赵德安,王玫.高超飞行器的再入非线性鲁棒控制[J].动力学与控制学报,2011,9(1):91~96; Zhang Jun, Zhao De-an, Wang Mei. Re-entry nonlinear robust control law for hypersonic vehicles[J]. Journal of Dynamics and Control,2011,9(1):91-96.

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  • 收稿日期:2010-11-09
  • 最后修改日期:2010-12-19
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