1) J2 force
J2力
1.
This paper uses an optimal control method based on LQR to control satellite formation flying, and makes simulation for earth oblateness perturbation (J2 force) in the low earth orbits (LEO).
采用了一种基于线性二次调节器(LQR)的最优控制方法,对低轨道地球卫星所受的地球扁率摄动(J2力)加以模拟,并在模拟的地球低轨道J2力环境中,对几种卫星编队进行了模拟控制,从控制精度和能量消耗的角度对控制方法进行了分析,提出了卫星编队飞行中相对距离控制和绝对距离控制需要注意的问题。
2) J2 time series
J2项
1.
By use of wavelet power spectrum analysis and discrete wavelet transform,the periods and characteristics of J2 time series of GRACE time-variable gravity models from CNES/GRGS、CSR、GFZ are analyzed and extracted,and then they are compared with the corresponding results of J2 time series from SLR tracking data.
利用小波功率谱分析和离散小波变换,对CNES/GRGS、CSR、GFZ等研究机构发布的GRACE时变重力位模型的J2项时间序列进行了周期分析和特征提取,并与利用SLR跟踪数据获得的J2项时间序列的分析结果进行了比较,结果显示:SLR跟踪数据获得的J2项相较GRACE J2项具有更明显的季节性变化特征。
3) J2 perturbation
J2摄动
1.
In this paper,the minimum-fuel,time-fixed optimal multiple-impulse rendezvous between non-coplanar elliptic orbits considering the J2 perturbation effects was mainly studied.
根据摄动理论,推导了航天器在J2摄动作用影响下进行交会飞行的运动方程,在此基础上,建立了求解多冲量最优交会问题的非线性规划模型,并针对三冲量和四冲量交会方式进行了交会轨迹的优化计算,得到了最优冲量的大小、方向及作用时刻。
2.
Two impulsive control strategys for formation keeping were put forward with regard to the problem that satellites formation could be destroyed under J2 perturbation.
针对卫星编队轨道构形在J2摄动干扰作用下被破坏的问题,给出了两种构形保持脉冲控制策略。
3.
In order to explore the effect of J2 perturbation,the non-singular orbit elements are imported.
把用转移矩阵法得出的相对运动分析解表达成一般轨道根数形式,为研究摄动影响而进一步表达成无奇点轨道根数形式;根据各轨道根数的J2摄动解分别研究编队构形在轨道坐标系三个方向上的振幅与相位的长期变化情况,揭示了构形引力摄动的长期演化机理;给出编队构形的摄动表达式,并以仿真实例验证其可信性;最后给出构形长期引力摄动的相关结论,并对编队构形设计提出建议,这将为研究编队构形的规划技术带来方便。
4) J_2 perturbation
J2项摄动
1.
The effect of J_2 perturbation on ellipse forming flying was also discussed.
讨论了J2项摄动对椭圆编队队形的影响。
2.
The continuous and discrete control methods to keep the position of micro-satellite forming flying that flied in ellipse orbit when J_2 perturbation was in consideration were derived by using Lyapunov potential function in this paper.
在考虑地球非球形引力J2项摄动时,用Lyaounov势函数法推导了连续和离散两种控制方法,以保持与控制运行于椭圆轨道的小卫星编队飞行位置。
5) J2 invariant perturbation
零J2摄动
1.
The J2 invariant perturbation conditions were developed to describe the relative movement of satellites in formation with small eccentricities.
该文推导了主、从星沿小偏心率轨道运行情况下的相对轨道的零J2摄动条件。
6) IPEC-J2 cells
IPEC-J2细胞
1.
The adhesion of 9 pig Lactobacillus strains on IPEC-J2 cell line and the effect of 5 Lactobacillus strains on the competitive, exclusive, displacement of adhesion and invasion of Salmonella typhimurium DT104 to IPEC-J2 cells were investigated.
采用猪肠道上皮细胞株IPEC-J2体外培养模型,考察9株猪源乳酸杆菌对IPEC-J2细胞的粘附特性,以及对鼠伤寒沙门氏菌DT104粘附的竞争、排斥、置换和抗侵袭作用。
2.
The adhesion of 9 pig Lactobacillus strains on IPEC-J2 cell line and the effect of 5 Lactobacillus strains on the competitive,exclusive,displacement of adhesion and invasion of Salmonella typhimurium DT104 to IPEC-J2 cells were investigated.
采用猪肠道上皮细胞株 IPEC-J2体外培养模型,考察9株猪源乳酸杆菌对 IPEC-J2细胞的粘附特性,以及对鼠伤寒沙门氏菌 DT104粘附的竞争、排斥、置换和抗侵袭作用。
补充资料：起力
1.致力。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条