半长轴

该套软件根据卫星轨道调整前后的轨道参数特点和轨道调整后的星下点轨迹要求，确定机动时间，将调整轨道半长轴与微调星下点轨迹结合起来，在最短时间内完成轨道调整任务。

The software determines maneuver time by considering the adjustment of semi-major axis and ground track .

接着重点对空间目标环境进行了分析，从散射截面积、周期分布、偏心率分布、倾角分布、近地点远地点高度和半长轴等多个方面进行了归纳总结。

Then space target environment are analyzed , including scatter cross section , cycle distribution , inclination distribution , eccentricity distribution , perigee altitude , apogee altitude , and Semi-major axis .

我们知道其相对轨道运动的主要半长轴a和周期p。

The major semiaxis a and p of the relative orbital motion are known .

计算结果表明，潮汐作用使轨道周期较小的Ba星系统的能量减小，所以系统轨道的半长轴和轨道偏心率减小；

The results show that tidal friction diminishes the total energy of binaries systems with shorter orbital periods .

针对中低轨道卫星，对平面内卫星半长轴a、偏心率e和近地点幅角ω联合调整，以及平面外轨道倾角调整等进行了理论推导。

The theory derivation for in-plane maneuver on semimajor axis , eccentricity and perigee argument and out-plane maneuver on orbit inclination was presented in this paper .

通过对3种星座构型，6种轨道半长轴，46°~66°之间轨道倾角的对比计算，以回归周期内星座CV值作为指标确定了初选卫星星座。

Through the comparative calculations on three kinds of configuration , six kinds of semi major axis and orbital inclination between 46 ° ~ 66 °, the original configurations are designed based on the constellation CV values in repeat period .

在此基础上提出了一种方法，通过调整环绕卫星的半长轴，大大减小了J2项摄动对编队飞行的破坏作用。

On this basis , a method is presented , which can greatly mitigate the breakage of the J 2 term by adjusting the semi major axis of the flying around satellite .

这就是为什么半长轴是，如此大的数字的原因。

So that 's the reason why this semimajor axis is indeed such a horrendous number .

椭圆轨道半长轴为，近地点到远地点。

A The ellipse has a semimajor axis A , - 2a perigee to apogee & is2a .

首先研究了通过改变轨道半长轴调整航天器升交点赤经变化率，进而控制轨道法向振幅的方法；

First , a new method of controlling the swing of orbit normal axis by changing the semi studied ;

当主卫星的半长轴相等时，主卫星轨道的偏心率越大编队飞行受大气阻力摄动的影响也越大；

Firstly , the effects caused by drag perturbation are very large when satellites within the formation are of different geometry and mass .

长轴的每一半叫做半长轴。拨入机长轴轴承无油润滑材料的应用

Either half of the major axis is called a semimajor axis . Application of Oil-free Lubricating Material to Long Shaft Bearings for Dog Transfer

分析了半长轴和倾角摄动变化率，以及初始半长轴和倾角偏置量对地面轨迹漂移的影响。

The effect of rate of change for semimajor axis and inclination perturbation and drift of semimajor axis and inclination on the ground-track drift was analyzed .

地球磁场对带电赤道卫星的轨道半长轴和偏心率的摄动影响

Perturbation effect of the earth ′ s magnetic field on the variation of the semimajor axis and eccentricity of the orbit of a charged equatorial sattellite

接着，基于一阶摄动解，得出了等半长轴绕飞编队的长期相对摄动规律，并通过调整环绕卫星的半长轴消除了长期相对摄动。

Based on the first order perturbing solutions , the thesis obtained the long term relative perturbation of equal semi-major axis formation , which is removed by adjusting semi-major axis of the flying-around satellite .

如果有多条轨道，都有相同的半长轴，周期相同，功业想听，这决非显而易见的。

That if you have various orbits which have the same semimajor axis , that the period is the same and the energy is the same , and that 's by no means obvious .

给出了影响卫星定点捕获所需速度增量的入轨轨道参数和点火姿态等因素，并仿真计算了轨道半长轴、近地点高度、倾角和近地点幅角与速度增量的关系。

The orbit injection parameters and firing attitude that affected velocity increment for orbital acquisition were presented . The relationships between the velocity increment and orbit semimajor axis , perigee altitude , inclination , and perigee argument were simulated .

本文详细分析了轨道长期运行期间，轨道半长轴以及地面轨迹漂移的变化情况，并采取半长轴超调控制的方法，利用自然力的被动控制，来实现较少控制次数。

The thesis analyzed the evolution of semi-major axis and ground track in long term . The method of using over-control was proposed , it can utilize passive control , save fuel and decrease the times of active control .

给出了由轨道半长轴确定空间两点间圆锥曲线转移轨道的方法，随后给出了一种固定发射时刻和转移时间的情况下利用半长轴迭代的圆锥曲线转移轨道求解算法。

A method determining conic transfer trajectory between two points in space by a fixed semi-major axis was given . An arithmetic solving conic transfer trajectory by iterating semi-major axis with a specified launch time and transfer time was given .

当内埋裂纹呈椭圆片状且面积保持一定时，由半长轴的随机分布和材料平面应变断裂韧性的随机分布可以得到构件在均匀拉应力下可靠工作的概率。

If the crack is ellipse shaped , the equivalant area is constant , and the distribution function of its major semiaxle and the plane strain fracture toughness of the material are given , then we would get the probability of reliability of the member under the uniform tension .