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Dynamics Modeling and L-1 Adaptive Control of a Transport Aircraft for Heavyweight Airdrop

机译：重型空投运输机动力学建模和L-1自适应控制

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摘要

The longitudinal nonlinear aircraft model with cargo extraction is derived using theoretical mechanics and flight mechanics. Furthermore, the nonlinear model is approximated by a semilinear time-varying system with the cargo disturbances viewed as unknown nonlinearities, both matched and unmatched types. On this basis, a novel autopilot inner-loop based on the LQR and L-1 adaptive theory is developed to reject the unknown nonlinear disturbances caused by the cargo and also to accommodate uncertainties. Analysis shows that the controller can guarantee robustness in the presence of fast adaptation, without exciting control signal oscillations and gain scheduling. The overall control system is completed with the outer-loop altitude-hold control based on a PID controller. Simulations are conducted under the condition that one transport aircraft performs maximum load airdrop mission at the height of 82 ft, using single row single platform mode. The results show the good performance of the control scheme, which can meet the airdrop mission performance indexes well, even in the presence of +/- 20% aerodynamic uncertainties.
机译：使用理论力学和飞行力学推导了带有货物提取的纵向非线性飞机模型。此外，非线性模型由半线性时变系统近似，其中货物扰动被视为未知非线性，无论是匹配类型还是不匹配类型。在此基础上，开发了一种基于LQR和L-1自适应理论的新型自动驾驶内环，以消除由货物引起的未知非线性干扰，并适应不确定性。分析表明，该控制器可以在快速自适应的情况下保证鲁棒性，而不会引起控制信号振荡和增益调度。整个控制系统由基于PID控制器的外环高度保持控制来完成。在单架单平台模式下，在一架运输飞机在82英尺的高度执行最大负载空投任务的条件下进行模拟。结果表明，该控制方案具有良好的性能，即使存在+/- 20％的空气动力学不确定性，也能很好地满足空投任务性能指标。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第7期|365130.1-365130.15|共15页
  • 作者

    Liu Ri; Sun Xiuxia; Dong Wenhan; Wang Dong; Chang Yungang;

  • 作者单位

    Air Force Engn Univ, Aeronaut & Astronaut Engn Coll, Xian 710038, Peoples R China.;

    Air Force Engn Univ, Aeronaut & Astronaut Engn Coll, Xian 710038, Peoples R China.;

    Air Force Engn Univ, Aeronaut & Astronaut Engn Coll, Xian 710038, Peoples R China.;

    Air Force Engn Univ, Aeronaut & Astronaut Engn Coll, Xian 710038, Peoples R China.;

    Air Force Engn Univ, Aeronaut & Astronaut Engn Coll, Xian 710038, Peoples R China.;

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