Parameter Uncertainty Analysis in Precise Pointing Control of Flexible Spacecraft

This article focuses on the validation of a classical PID controller scheme for flexible spacecraft with regards to effect parameter uncertainty system stability and pointing precision. A high-fidelity simulation environment external disturbances was built in Simulink using control-oriented model an Earth-observing satellite appendage on-board microvibration sources orbit around planet. Then, control loop designed sensor dynamics, time delay behaviour, smooth trajectory generator. After declaring natural frequencies, damping ratio, rotation angle appendage, as well propellant tank mass be uncertain, two worst-case scenarios were identified. Comparing response systems nominal settings, only minor drop has been found phase margins, little no difference errors (smaller than ±2 arcsec both roll pitch).