Fig. 1. Principle diagram of single-axis attitude maneuvering of drag-free satellite

Fig. 2. Calculation results of additional interference moment

Fig. 3. Factors affecting attitude adjustment

Fig. 4. Simulation results under different conditions

Fig. 5. Monte Carlo simulation results

Fig. 6. Displacement-output curve of piezoelectric ceramic

Fig. 7. Control block diagram of velocity-attitude double-loop

Fig. 8. Mass velocity and satellite angle before and after nonlinear compensation

Fig. 9. Framework of compound-axis control system

Fig. 10. Residual attitude error after tuning

Fig. 11. Variation of stability error with bandwidth of auxiliary axis

Fig. 12. Residual error of auxiliary axis at 0.485 6 Hz

Fig. 13. Angle and angular velocity response of main axis

Fig. 14. Angle and angular velocity response of auxiliary axis

Fig. 15. Error amplitude spectral density of main and auxiliary axes