Orbits of this type can be positioned near collinear libration points, and for simplicity it is adequate to take linear terms into consideration in the controlprocess.
这种类型的轨道可以离共线平动点较近，那么只需要在控制过程中考虑线性项即可，控制条件简单。
2
Suspension Cast-in Situ Beam construction is to control the construction process and bridge state of internal force and linear, so that the bridge State could fully meet the design requirements.
This measure system is suitable to measure linear and Angle displacement during manufacturing process of NC machine tool, and it can constitute closed loop control system with CNC system.