Output Feedback Control and Its Application to a Flexible Spacecraft

  • Sung, Yoon-Gyeoung (School of mechanical engineering Yeungnam University, Kyungbuk , South Korea) ;
  • Joo, Hae-Ho (School of mechanical engineering Yeungnam University, Kyungbuk , South Korea)
  • Published : 2000.12.01

Abstract

An output feedback control (OFC) is presented for a linear stochastic system with known disturbance and applied to a flexible spacecraft for the reduction of residual vibration while allowing the natural deflection during operation. By converting the tracking problem into regulator problem, the OFC minimizes the expected value of a guadratic objective function composing of error stats which always remain on the intersection of sliding hypersurfaces. For the numerical evaluation with a flexible spacecraft, a large slewing maneuver strategy is devised with a tracking model for nominal trajectory and start-cost-stop strategy for economical maneuver in conjunction with the input shaping technique. The performance and efficacy of the proposed control scheme are illustrated with the comparison of different maneuver strategies.