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首页> 外文学位 >Mise in oeuvre du modele et synthese d'une loi de commande par commutation de compensateurs pour un avion commercial (French text).
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Mise in oeuvre du modele et synthese d'une loi de commande par commutation de compensateurs pour un avion commercial (French text).

机译：通过切换商用飞机的补偿器来实现模型和控制律的综合（法文）。

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The main goal of this work is to design a control law for a commercial airplane autopilot, available through the entire flight envelope. The first step of such a project is to obtain the linearised model of the system we seek to control. This was carried out based on a full compendium edited by the Boeing Company Inc. of aerodynamic data and simulations of the B-747 aircraft we had at our disposal. Firstly, we obtained its nonlinear model and then, after decoupling, its linearised longitudinal model which is available for any flight condition.; Secondly, after a review of command law synthesis methods for aircraft, we decided to design a control structure containing several controllers which switch from one to another according to the flight condition of the aircraft. The method used, whose theory is widely studied, was the H∞ synthesis which gives the necessary robustness to controllers to perform well over a wide enough flight domain. After studying and validating a method to ensure bumpless switching between command signals (the so-called observer-based method), we studied a control structure with gain-scheduling. A performance criterion was chosen to select which controllers had to be used in this structure, considering that the aim was to use the least number of them.; The last step consisted in validating the designed control law: we sought to ensure its smooth functioning and to reach the performance awaited. Moreover, this work led to designing graphical interfaces permitting to easily apply the results presented in this dissertation, and to show the motions of the Boeing 747 through an animation.
机译：这项工作的主要目的是为商用飞机自动驾驶仪设计一个控制律，该律在整个飞行包线中都可用。这个项目的第一步是获得我们要控制的系统的线性化模型。这是根据波音公司（italic）的空气动力学数据和我们所使用的B-747飞机（italic）的模拟编写的完整摘要进行的。首先，我们获得了它的非线性模型，然后去耦后，得到了它的线性化纵向模型，该模型对于任何飞行条件都是可用的。其次，在回顾了飞机的命令法综合方法之后，我们决定设计一种包含多个控制器的控制结构，这些控制器根据飞机的飞行状况从一个控制器切换到另一个控制器。使用的方法（其理论已得到广泛研究）是H ∞综合，它为控制器提供了必要的鲁棒性，使其能够在足够宽的飞行范围内正常工作。在研究并验证了确保命令信号之间无扰动切换的方法（所谓的基于观察者的方法）之后，我们研究了具有增益调度的控制结构。考虑到目标是使用最少数量的控制器，选择了一种性能标准来选择在该结构中必须使用哪些控制器。最后一步是验证设计的控制法则：我们试图确保其平稳运行并达到期望的性能。此外，这项工作还导致设计了图形界面，从而可以轻松应用本文中介绍的结果，并通过动画来显示 Boeing 747 的运动。

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