کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1714592 | 1519950 | 2014 | 16 صفحه PDF | دانلود رایگان |
• Observer-based hovering control over a tumbling asteroid in body frame.
• An extended Kalman filter is used to process range measurements.
• The estimated states are used in the optimal feedback control algorithm.
• Two controller methods: time-varying LQR or the Lyapunov–Floquet transformation.
• Closed-loop response and control effort are investigated for both controllers.
Observer-based hovering control over a tumbling asteroid in the body-fixed frame is studied. An extended Kalman filter (EKF) is used to process range measurements from a small collection of ground stations, yielding estimates of the spacecraft state vector and the gravitational parameters of the asteroid assuming a second degree and order gravity field model. The estimated states are used in the optimal feedback control algorithm which consists of two alternatives: time-varying LQR or the Lyapunov–Floquet transformation (LFT) and time-invariant LQR. The closed-loop response of the system and the control effort required are investigated and compared for both control strategies.
Journal: Acta Astronautica - Volume 102, September–October 2014, Pages 124–139