THE GNC SYSTEM OF CHANG’E-1 SPACECRAFT
- Paper number
IAC-08.A3.2.A8
- Author
Prof. Huang Jiangchuan, Beijing Institute of Control Engineering, China
- Coauthor
Dr. Honghua Zhang, Beijing Institute of Control Engineering, China
- Year
2008
- Abstract
Chang’E 1 spacecraft is the first of a series of Chinese missions to the Moon, which was launched in late 2007 and will orbit the Moon for one year to survey the lunar environment and surface regolith. As an important part of the spacecraft, the guidance navigation and control (GNC) system complete various complex tasks. In the phasing orbit, the GNC system performs many attitude maneuvers and orbit controls so that the spacecraft is injected to the proposed transfer orbit to the Moon. In the transfer orbit, the GNC system makes the spacecraft directed to the Sun and an orbit mid-course correction so that the point inserting to the orbit around the Moon is captured. In the inserting orbit, the GNC system performs several orbit control so that the nominal orbit around the Moon is established. In the nominal orbit around the Moon, the GNC system makes the spacecraft directed to the Moon, the antenna to the Earth, the solar arrays to the Sun. The GNC system of the Chang’E 1 spacecraft is composed of sensors (like sun sensors, star sensors, ultraviolet sensors and IMU), actuators (like momentum wheels, propulsion thrusters, etc.), controller (like GNCC-GNC computer, ECC-Emergency Control Computer and SDC-Source Distribution Connector) and various softwares. The LTUs (Local Terminal Units) in the sensors and actuators are connected through the data bus to the control computer to form a control network. The software adopts the operation system based on the tasks scheduling to perform the local data information collection, the control parameter computation and order execution, the telemetry and telecontrol service, and etc.. This distributed architecture of the GNC system guarantees the complex tasks are completed efficiently and reliably. This paper describes the configuration, control methods, the feature, and the flight results of the GNC system for Chang’E 1 spacecraft.
- Abstract document
- Manuscript document
(absent)