Difference between revisions of "Aerobraking/zh-cn"

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'''Aerobraking''' is a technique to lose velocity after reaching a celestial body.
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'''气动刹车'''是抵达某天体后采取的一种减速机动技术。
  
Usually when the craft enters the sphere of influence of a celestial body, the relative speed to it will be much too high to enter an orbit, unless burning retrograde and expending a lot of fuel. In order to save the fuel, the craft can either perform a [[Tutorial: Gravity Assist|gravity assist]] or perform an aerobraking maneuver.
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通常当飞船进入天体的引力范围球体时,飞船自身的相对速度很高,无法入轨,除非进行反向推进减速,而这又会消耗大量宝贵的燃料。为节约燃料,飞船既可以利用[[Tutorial: Gravity Assist|重力助推]]减速,或者进行气动刹车机动。
  
To perform an aerobrake, the trajectory of a craft has to be altered to pass through the atmosphere of a celestial body. The atmospheric drag will slow the craft down enough to reach an eccentric orbit around it. After the apoapsis is lowered to the wanted altitude, it is necessary to raise the periapsis outside the atmosphere to prevent additional aerobraking maneuvers.
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为进行气动刹车,需要调整飞船的轨道,让部分轨道位于大气层之内。空气阻力会降低飞船的速度,使它进入环绕天体的高离心率轨道。当轨道近点低于目标高度后,同时要注意保持轨道远点位于大气层之外,避免过量的气动刹车减速。
  
Aerobraking is a dangerous maneuver. When the craft dips too deep into the atmosphere, it will lose too much speed and risk crashing. When it doesn't dip deep enough, it might not lose enough speed to enter an orbit. Usually it is better to be careful, because even when the orbit turns out to keep it just barely in the SoI of the planet, the orbit allows it to perform additional aerobreaks to slow it down more. In the current version (0.19.1) flying through an atmosphere at high velocity will cause dangerously-looking red flames around your craft, but this is completely harmless (except for extended solar arrays). It was already announced that later versions will implement reentry heat which can cause damage to a vessel. This factor could make aerobraking even more dangerous.
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气动刹车一种危险的机动。如果飞船进入大气层的深度过大,它会减速过多,很容易坠毁。而如果减速偏少,飞船就无法进入预定的轨道。
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Usually it is better to be careful, because even when the orbit turns out to keep it just barely in the SoI of the planet, the orbit allows it to perform additional aerobreaks to slow it down more. 在目前的版本(0.19.1)中,在大气层内的高速飞行会在飞船四周产生看起来很怕的红色火焰,不过这其实完全就是纸老虎(除了张开的太阳能电池帆板会被损坏)。我们已知的是,后续版本会加入再进入高热环节,它会对飞船产生实际的损伤。这一因素会使气动刹车变得更加危险。
  
For the ideal height for an aerobrake maneuver, consult the article about the planet. The following planets and moons have an atmosphere which allows aerobraking:
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查询具体行星的wiki,可以看到进行气动刹车所需要的理想高度。下列行星和卫星都具有可供气动刹车的大气层。
  
* [[Eve]]
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* [[Eve/zh-cn|Eve]]
* [[Kerbin]]
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* [[Kerbin/zh-cn|Kerbin]]
* [[Duna]]
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* [[Duna/zh-cn|Duna]]
* [[Jool]]
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* [[Jool/zh-cn|Jool]]
* [[Laythe]]
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* [[Laythe/zh-cn|Laythe]]
  
For computing more precise aerobraking manoeuvers, this [http://alterbaron.github.com/ksp_aerocalc/ aerobraking calculator] might come in handy.
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如果需要计算更加精确的气动刹车机动飞行参数,或许这个小工具会有帮助:[http://alterbaron.github.com/ksp_aerocalc/ aerobraking calculator]

Revision as of 01:36, 24 June 2013

气动刹车是抵达某天体后采取的一种减速机动技术。

通常当飞船进入天体的引力范围球体时,飞船自身的相对速度很高,无法入轨,除非进行反向推进减速,而这又会消耗大量宝贵的燃料。为节约燃料,飞船既可以利用重力助推减速,或者进行气动刹车机动。

为进行气动刹车,需要调整飞船的轨道,让部分轨道位于大气层之内。空气阻力会降低飞船的速度,使它进入环绕天体的高离心率轨道。当轨道近点低于目标高度后,同时要注意保持轨道远点位于大气层之外,避免过量的气动刹车减速。

气动刹车一种危险的机动。如果飞船进入大气层的深度过大,它会减速过多,很容易坠毁。而如果减速偏少,飞船就无法进入预定的轨道。 Usually it is better to be careful, because even when the orbit turns out to keep it just barely in the SoI of the planet, the orbit allows it to perform additional aerobreaks to slow it down more. 在目前的版本(0.19.1)中,在大气层内的高速飞行会在飞船四周产生看起来很怕的红色火焰,不过这其实完全就是纸老虎(除了张开的太阳能电池帆板会被损坏)。我们已知的是,后续版本会加入再进入高热环节,它会对飞船产生实际的损伤。这一因素会使气动刹车变得更加危险。

查询具体行星的wiki,可以看到进行气动刹车所需要的理想高度。下列行星和卫星都具有可供气动刹车的大气层。

如果需要计算更加精确的气动刹车机动飞行参数,或许这个小工具会有帮助:aerobraking calculator