Robust Hybrid Attitude Tracking and Vibration Suppression Control of a Remote Sensing Flexible Satellite Based on Command Shaping Method

Tite: Robust Hybrid Attitude Tracking and Vibration Suppression Control of a Remote Sensing Flexible Satellite Based on Command Shaping Method (DOI)
​​​​​​​Authors:  Mohammad Zarourati, Mehran Mirshams, Morteza Tayefi.
Journal:  Arabian Journal for Science and Engineering
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Abstract: This study addresses practical challenges in attitude and vibration control for high-resolution remote sensing flexible satellites. The flexibility of deployable solar arrays creates difficulties for satellite attitude control. Nevertheless, remote sensing satellites require fast maneuvers to take images of targets within specific imaging time limits. These fast maneuvers cause oscillations in the deployable solar array, which degrade image quality. This article proposes an attitude tracking control to address uncertainties caused by solar array flexibility. The modeling of the flexible satellite is conducted using Adams-Simulink, and a multidisciplinary simulation verifies that the maximum error in attitude control applications is within 3%. An extended adaptive robust attitude controller is utilized due to uncertainties in the satellite model and external disturbances. The adaptive robust attitude tracking control performs well in maneuvers with a slew rate of less than 1 deg/s. However, during fast attitude maneuvers, the high-frequency vibration amplitude of the angular velocities increases. Therefore, a novel robust hybrid control is applied to suppress the vibrations. The proposed control is the adaptive robust attitude controller based on the command shaping method. The zero vibration derivative–derivative input shaper produces a command signal that suppresses vibrations generated in the flexible components. Additionally, the input shaping technique presented in this work exhibits robustness against variations in the system's natural frequencies. Simulation results demonstrate that the proposed hybrid control improves pointing accuracy and stability and effectively suppresses vibrations.