A nonlinear guidance law and control strategy is proposed for aircraft applying to attack the ground fixed targets.

对于攻击地面固定目标的飞行器，提出一种非线性制导律和控制方法。

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In this paper, the method of reentry maneuver guidance applying to attack the ground fixed target is described by using flight dynamics principle and modern control theory.

本文运用飞行力学原理和现代控制理论，对攻击地面固定目标的飞行器的再入机动制导方法进行了研究。

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"When they had fixed the ground so the grass could grow, I saw children dancing there in the sunlight.

VOA: special.2010.08.01

Richard Myers estimated Tuesday, in an afternoon briefing to reporters, that the first hours of the air operation resulted in an "85 percent" success rate, and had effectively cleared away most fixed, ground-based threats to U.S. aircraft.

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The ocean overlaps one end of the plank and the other end is fixed to the ground (the interior of the tectonic plate).

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Down below, the workmen had prepared a metal net, which was fixed to the ground with long nails, all around the space where the crane was slowly lowering its load.

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