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Dynamic Guidance of Gliders in Planetary Atmospheres

机译:行星大气中滑翔机的动态制导

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Using dynamical systems techniques, a new algorithm to direct the trajectory of gliders to a preassigned target point is proposed. The algorithm is applicable to any unpowered lift-enabled vehicle (glider) traveling in planetary atmospheres, locally determining the shortest path to the target point. The guidance commands are chosen taking into account the drag and lift coefficients of the glider, with a parameterization based on wind tunnel data. As a proof of concept, the new algorithm has been applied to the guidance of the Space Shuttle during its return flight to Earth. Numerical simulations over a wide range of parameter values have shown that the algorithm is resilient to changes in both the initial conditions and the atmospheric conditions. For a typical gliding flight in the Earth's atmosphere, from an altitude of 30 km down to 3 km, the margin of error for reaching the target ranges from 20 to 80 m. (C) 2015 American Society of Civil Engineers.
机译:利用动力学系统技术,提出了一种将滑翔机的轨迹引导到预定目标点的新算法。该算法适用于在行星大气中行驶,本地确定到达目标点的最短路径的任何无动力升降机(滑翔机)。选择引导命令时要考虑滑翔机的阻力和升力系数,并基于风洞数据进行参数化。作为概念的证明,新算法已应用于航天飞机返回地球的制导中。在广泛的参数值范围内的数值模拟表明,该算法可抵抗初始条件和大气条件的变化。对于典型的在地球大气中滑行的飞行,从30 km的高度下降到3 km,到达目标的误差范围为20到80 m。 (C)2015年美国土木工程师学会。

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