A08011022_Wang Chao_Kong Xianghuan_Kong Haoyu--English translationDesign and Control Strategy of Chang E III soft landing orbitAbstractChang E III realized a soft landing of extraterrestrial objects f

ficance for the design and control strategy of soft landing orbit, we will not discuss it in this paper.

For the control strategy, we proposed a two-phase strategy. In the first phase, the probe uses the high-precision guidance system to adjust its attitude and velocity, and performs a series of orbit corrections to ensure that the probe enters the predetermined orbit accurately. In the second phase, the probe uses the visual navigation and control system to perform autonomous soft landing. The system uses machine vision to identify and avoid obstacles, and adjusts the thrust and attitude of the probe in real time to ensure a safe and accurate landing.

To achieve the above control strategy, we designed a guidance and control system that consists of three parts: the high-precision guidance system, the visual navigation and control system, and the engine control system. The high-precision guidance system includes a star tracker, an inertial measurement unit, and a GPS receiver, which can provide accurate attitude and position information for the probe. The visual navigation and control system uses a camera and a laser altimeter to identify the terrain and obstacles, and adjust the attitude and thrust of the probe accordingly. The engine control system uses a throttle valve and a nozzle to control the thrust of the engine, and ensure a smooth and accurate landing.

In conclusion, the design and control strategy of Chang E III soft landing orbit is a complex and challenging task, but it is of great strategic significance for China's space exploration. By simplifying the perturbed two-body model, calculating the velocity and orbit parameters, and proposing a two-phase control strategy, we have laid a theoretical foundation for the successful soft landing of Chang E III. The proposed guidance and control system provides a practical solution for the implementation of the control strategy, and can be applied to future lunar exploration missions