【作者】 张俊韬；

【导师】 侯中喜；

【作者基本信息】 国防科学技术大学 ， 航空宇航科学与技术， 2010， 硕士

【摘要】 超压翼伞具有气动效率高、可控性强、抗风能力好等优点,可以用于精确定点回收、可折叠飞行器等领域,因此具有良好的生存能力和应用价值。随着技术进步,这种飞行器以其远程飞行、高度高、长航时以及机动性好等方面的独特优势,将成为研究的热点并拥有巨大的发展前景。国内对相关领域的研究与国外相比还有很大差距。本文从总体设计的角度出发,采用理论分析与数值仿真相结合的方法,对超压翼伞系统的充气翼设计分析、动力学模型和控制系统概念设计等问题进行了比较系统的研究,得到了若干有意义的结论。探讨了经纬网络充气翼的受力分析以及其变形的特点,在此基础上给出了经纬网络充气翼的设计方法,以精确地逼近标准翼型。利用CFD计算软件,通过与标准翼型的对比,比较系统地对充气翼的气动性能进行了分析。阐明了在一般的条件下,充气翼的气动性能较之与标准翼型有所下降,但幅度不大。这为总体的设计工作提供了反馈的参考,同时也为运动特性分析创造了条件。建立了带动力的超压翼伞系统的六自由度动力学模型。其中的表观质量采用含义较全的矩阵形式表示,并给出了半经验的计算式;依据对目前充气翼气动力研究现状的分析,采用气动估算与工程分段处理相结合的方法来得到所需的气动力。通过仿真计算,分析了超压翼伞的主要设计参数对其系统性能的影响,得到了一些有益的结论,为系统总体方案的设计与评估、运动状态的分析等提供了有价值的参考。从概念设计的角度对控制系统进行了硬件和软件的设计,实现了两者的结合。并对典型的运动状态进行了姿态控制律设计,体现了控制系统总体的指导思想,为后续的详细设计打下了基础。本文可为新型超压翼伞的总体设计、分析,以及相关问题研究提供关键技术参考和可行性研究参考。更多还原

【Abstract】 Overpressure Inflatable Parafoil has excellent viability and application value because of its advantage on high aerodynamic efficiency, strong controllability and the ability of standing against wind, therefore, it can be used in fields such as precise recovery and folding vehicle. Along with the technique developing, this kind of vehicle could be a hotspot and developed widely, because of its particular advantage in long distance, high altitude, long flight time and good maneuverability. There is still a large difference internal than in other countries, researching in relative field. This thesis begins at the point of view of collectivity design, being analyzed thoroughly and systematically in method of theoretical analysis and numerical simulation, including design and analysis of the inflatable wing, dynamics model and concept design of the control system of Overpressure Inflatable Parafoil. Some valuable conclusions were drawn.Dynamic analysis and transmutation properties of the longitudinal and latitudinal meshwork inflatable wing are discussed, and the design method is educed to approach the normal aerofoil exactly. Aerodynamic performance of the inflatable wing is analyzed thoroughly and systematically in method of comparing to the normal aerofoil, by using the CFD calculation software, clarifying that generally speaking, aerodynamic performance of the inflatable wing goes down compared to the normal aerofoil, but not observably. It could provide feedback references to the work of collectivity design and create qualification to the analysis of dynamic properties.6DOF dynamics model of Overpressure Inflatable Powered Parafoil is built up. Apparent mass is expressed as the meaningful matrix form, and educed half experiential calculation formula. According as the analysis of the research of inflatable wing recently, aerodynamic force is gained by the means of aerodynamic estimation combining with engineering subsection disposal. Some primary design parameters’effects on the system performance of Overpressure Inflatable Parafoil were analyzed by emulation calculation. Some valuable conclusions were drawn. It could provide valuable references of design and evaluation of the system collectivity scheme and analysis of movement state.At the point of view of concept design, the hardware and software of control system are designed, link the two together. The stance control law of typical movement state is designed, which incarnate the guide idea of control system collectivity, grounding the future detailed design.The study accomplished in this paper could provide references of key technique and feasibility research to the collectivity design, analysis and research on relative problems of the new pattern Overpressure Inflatable Parafoil.更多还原