研究了编队飞行的控制系统结构和共线拉格朗日点附近的周期轨道保持控制问题。
Secondly, the control system structure and station keeping problems near collinear Lagrange points are studied.
基于微分修正算法给出了一种简单的拟周期轨道保持控制方法，数值仿真表明该方法具有较高的控制效率。
A simple station keeping control algorithm is given based on differential corrections, and numerical simulation shows that the algorithm is very effective.
它可以让火车在现有蜿蜒盘旋的轨道上保持匀速。
It allows the train to maintain a constant speed through the twists and turns of existing track.
这大约是一个物体从赤道沿轨道垂直向上运行的高度，这样它就可以一直保持在地球同一地点的正上方。
That's about how high an object would have to be orbiting straight up from the equator to constantly remain directly above the exact same spot on the rotating planet Earth.
计划以及预估基本上是这样一种机制，首先，决定项目值得去做，然后作为一种方案，保持项目始终处于轨道中。
Planning and estimating is basically a mechanism for first determining that the project is worth doing and later as an approach for keeping the project on track.
目前系统需要不断操作干预以保持运作，并且没有解决日益增长的轨道上小型和微型卫星的数量。
The current system requires constant sustainment intervention to maintain operations and does not address the growing population of small and micro satellites in orbit.
这颗卫星发生了一些故障而无法保持在其正确的轨道上，2007年底空军确定它将很快坠落在地球上。
The satellite had trouble maintaining orbit, and by late 2007 the Air Force determined that it would soon crash to Earth.
联盟号飞船用于在地球和轨道之间运输航天员，而且经常保持充足的数量，因此当危险发生时，它们可以作为“救生船”使用。
Soyuz capsules are used to ferry crew to and from the orbiting platform, and enough vehicles are always present so that they can be used as "lifeboats" if an emergency arises.
当你设定有形目标时，做好准备迎接挫折，这样就能更容易地留在既定轨道上并保持动力。
When you set tangible goals, and prepare for setbacks, it's far easier to stay the course and keep motivated.
他说，谅解备忘录的签署标志着两国议会的交流与合作步入了机制化、制度化的轨道，有利于保持双方交往的连续性。
Wu said the signing of this MOU institutionalized inter-parliamentary exchanges and cooperation between the two sides, and will help maintain the ongoing exchanges between the two sides.
迄今为止所发现的454颗系外行星中，多颗都具有极近椭圆形的轨道，这意味着行星与它们的母星并不总保持相同距离。
Many of the 454 exoplanets discovered to date have highly elliptical orbits, meaning the planets are not always the same distance from their parent star.
出口放缓和超过8%的高通胀本已令中国焦头烂额，而今又增加了一项灾后重建工作，这使得中国经济要想保持在正常轨道运行变得更加困难了。
The country is already roiled by worries over weakening exports and high inflation, of more than 8%. Adding disaster relief to the mix makes steering the proper course even more difficult.
首先，这些金融机构必须保持将贷款发放给无价值的借款者，以保持国家现时的扩张不偏离轨道。
First, these financial institutions have to keep lending to unworthy borrowers to keep the country's current expansion on track.
如果你希望改善你们的效率并保持在正常的工作轨道上，那么你必须去评估项目本身以及项目执行的过程。很遗憾的是，许多基础组织很少评估其中任何一方面。
Your group will need to evaluate both projects and processes if you wish to improve your effectiveness and stay on track. Unfortunately, many grassroots groups rarely evaluate either.
一个违例保持2个ECCS轨道是可操作的,由于气体的累积，在充电和,泵吸线路，自我确定，如果你们确定，你们就能得到赞誉。
A failure to maintain two ECCS trains operable due to gas accumulation in the charge and pump suction line. Self-identified, if you identify it by yourself you get credit.
无疑，更多的资金，但还有更好的干预措施、更有力的证据和强大的统一政策和战略，使合作伙伴的工作保持在同一轨道上。
More money, for sure, but also much better interventions, better evidence, and strongly unifying policies and strategies that keep partners working on the same track.
强健的组织技能，有效的生产习惯和强烈的纪律性是让自己持续保持在轨道上所需要的。
Strong organizational skills, effective productivity habits, and a strong sense of discipline are needed to keep yourself on track.
无需将废弃的飞行器保持在轨道上，而是在几年的过程中将其拖入大气层引燃。
Instead of keeping the derelict craft in orbit, it will, over the course of a couple of years, drag it into the atmosphere and thus to a fiery end.
在这里，我们来看一些简单的方法来节约和保持您和您的家人沿着健康的轨道生活。
Here we look at some easy ways to save bundles and keep you and your family on a healthy track.
上述政策正处于关键时期，这些文件的出台非常清晰的点出期间的代价与风险所在，显然做出相应的调整以确保政策保持在正确轨道上也因此变得非常必要。
Those policies are at a critical stage and these documents may very well underscore the stakes and make the calibrations needed to get the policy right.
质子与电子间的吸引力使电子保持在他们的轨道上。
Electrons are kept in their paths by the force of attraction between the protons and the electrons.
所有企业都会计专业人士，他们保持在轨道上与他们的预算和支出。
All businesses have Accounting professionals that keep them on track with their budgets and spending.
有DNS伺服器世界各地都保持轨道的姓名相符，其中数字型IP地址。
There are DNS servers all over the world that keep track of which names correspond to which numeric IP addresses.
愿景。能够把大的想法变成可执行的计划，同时保持你的团队的轨道上是领先的关键部分。
Vision. Being able to turn big ideas into executable plans while keeping your team on track are crucial parts of leadership.
这意味着共振可能使行星保持在它们轨道上。
That means there are likely planets in resonances that keep them in their places.
我们所需要的就是保持一种强烈的想往，想往着顺延属于自己的轨道行进，想往着为此而作出必须的工作。
All we need is a powerful intention, and a willingness to do the work necessary to moving forward on our path.
宇宙万物各循轨道运行，彼此保持一定的秩序，毕竟也都有赖于引力的作用。
But it is also gravity pull thatkeeps our world together, that keeps the planets in their orbitsand our universe in order.
宇宙万物各循轨道运行，彼此保持一定的秩序，毕竟也都有赖于引力的作用。
But it is also gravity pull thatkeeps our world together, that keeps the planets in their orbitsand our universe in order.
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