Journal of Astronautics ›› 2012, Vol. 33 ›› Issue (4): 411-418.doi: 10.3873/j.issn.1000-1328.2012.04.001

• GNC • Previous Articles     Next Articles

Disturbance Observation-Based-Controller Design of Drag-Free Satellite

CAO Xi-bin, SHI Li, DONG Xiao-guang, WANG Feng   

  1. Research Center of Satellite Technology,Harbin Institute of Technology,Harbin 150001,China
  • Received:2011-01-23 Revised:2012-02-11 Online:2012-04-15 Published:2012-05-02

Abstract: The controller design of Drag-Free satellites on near-earth orbit is the object of the study. After analyzing characteristics of main disturbances affecting Drag-Free satellites, a disturbance dynamics model is established. Adding the disturbance to the system, a disturbance observation based-dynamics model of Drag-Free satellite is built. Then a mixed H2/H∞ controller is designed and the LMI form is used to solve it. Simulation results verify stability and feasibility of the controller.

Key words: DraG-Free satellite, Disturbance observation, LMI