Hua-yang SAI, Zhen-bang XU, Shuai HE, En-yang ZHANG, Chao QIN. Predefined-time sliding mode control for rigid spacecraft[J]. Optics and Precision Engineering, 2021, 29(12): 2891
- Optics and Precision Engineering
- Vol. 29, Issue 12, 2891 (2021)
Fig. 1. Coordinate reference frame system of spacecraft
Fig. 2. Block diagram showing the flow of the control signals for the PTSMC scheme.
Fig. 3. Attitude tracking errors of PTSMC and SOPTSMC
Fig. 4. Angular velocity tracking errors of PTSMC and SOPTSMC
Fig. 5. Control inputs of PTSMC and SOPTSMC
Fig. 6. Attitude tracking errors of PTSMC， PD and NTSMC
Fig. 7. Angular velocity errors of PTSMC， PD and NTSMC
Fig. 8. 3-DOF free-flying robot floating platform
Fig. 9. Attitude tracking experimental results of the floating platform of a 3-DOF free-flying robot
Fig. 10. Changes of x ， y and ϕ of the floating platform with time
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