它也包含了月球对地月质心的摄动和采用各向同性的标准坐标系表示的相对摄动。

It also contains the perturbations of the Moon onto the earth-moon barycenter and the relativistic perturbations expressed in isotropic and standard coordinates.

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进而导出了带有J2项摄动的环绕星相对运动方程，并给出了基于惯性笛卡尔坐标系运动学变量的相对轨道控制方法。

Then a control method considering the J2 perturbation based on Encke's linearization equation is proposed to maintain the relative motion of the constellation.

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将质量和刚度摄动看成是对原结构的简谐激励，获得原结构广义坐标的受迫振动方程。

If mass or stiffness perturbation is considered to be a harmonic excitation, one has obtained a forced vibration equation to the original structure.

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