Multi-Objective Non-Fragile Robust Attitude Control for Flexible Microsatellite Close-Proximity Inspection

Multi-Objective Non-Fragile Robust Attitude Control for Flexible Microsatellite Close-Proximity Inspection

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In this paper, the non-fragile robust attitude control problem is investigated for flexible microsatellite close-proximity inspection, with external disturbances, parameter uncertainties and input constraints.Firstly, the attitude motion model granular foveolae of microsatellite with flexible appendages is established.Secondly, a non-fragile robust dynamic output feedback controller (RDOFC) with multiplicative gain variations (MGV) is designed to satisfy the multi-objective requirements, including pole assignment, $H_{infty }$ disturbances attenuation and input constraints.Based on the Lyapunov stability theory, the design of the non-fragile robust $H_{infty }$ attitude control creative grids quick trim and circle ruler is formulated as the linear matrix inequality (LMI) condition.Finally, numerical simulations are performed to demonstrate the effectiveness of the proposed controller.