Abstract
Tiangong-1 is Chinas largest and heaviest on-orbit manned spacecraft at the moment, with characteristics of variable configuration and variable parameters. CMG and jet propulsion system are used to realize the high accuracy and high stability of its attitude control. Through analyzing the feature of the combination of slowly variation and jump variation of model parameters of Tiangong-1, a highly reliable and flexible control strategy is planned and intelligent multi-model adaptive attitude control system was designed. The distribution of index switching functions is set based on the rule set of intelligent control, and the multi-model controller is established for the attitude control of various controlled objects and control tasks using multi-model adaptive algorithm. After ground tests and physical simulation experiments of Tiangong-1, it was launched and performed well on orbit. The successful rendezvous and dockings with manned spacecrafts including Shenzhou-8, Shenzhou-9 and Shenzhou-10 illustrate the validity and effectiveness of the attitude control system. The control system has advantages in assembly attitude control of large spacecrafts with variable configuration and variable parameters, and prospects in the future construction of space station in manned space flights.
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