再入飞行是RLV飞行任务的重要阶段，而制导、导航与控制（GNC）系统则是RLV的核心系统之一，是RLV再入飞行的“脑系统”。
The guidance, navigation and control(GNC) system, the brain system, is the one of the key systems of RLV. In this paper the mission requirements and system structure are first studied.
质量是一个永恒问题，更是军工产品的生命线，也是导航、制导与控制系统研制和生产中所存在的一个关键问题。
Quality is a permanent problem. It is not only a lifeline of military products, but also a key problem of research and production in navigation, guidance and control system domain.
我战斗了大约五分钟，变得更短，更有趣的司机得到了更好地与RC控制导航(居委控件响应流畅，司机没有这么多)。
My battles took about five minutes, becoming shorter and more fun as the drivers got better navigating with the RC controls (the RC controls are responsive and smooth, the drivers not so much).
我战斗了大约五分钟，变得更短，更有趣的司机得到了更好地与RC控制导航(居委控件响应流畅，司机没有这么多)。
My battles took about five minutes, becoming shorter and more fun as the drivers got better navigating with the RC controls (the RC controls are responsive and smooth, the drivers not so much).
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