نوع مقاله : علمی پژوهشی
عنوان مقاله English
نویسندگان English
In this article, a robust fault-tolerant controller based on artificial neural networks is introduced for attitude regulation of a nonlinear spacecraft system under system dynamic uncertainties, measurement noise, external disturbances, and actuator faults. Using neural networks, the spacecraft's nonlinear dynamics are approximated and incorporated into the development of the robust control scheme. The proposed method offers enhanced reliability, precise trajectory tracking, minimal tracking error, rapid convergence, robustness, and consistent control performance despite dynamic uncertainties, actuator malfunctions, and external perturbations. Neural network weights are adapted and updated to ensure that the Lyapunov function’s derivative remains negative, thereby guaranteeing closed-loop system stability. The controller’s performance is assessed under multiple actuator fault scenarios and benchmarked against alternative control strategies.
کلیدواژهها English