نوع مقاله : علمی- ترویجی
عنوان مقاله English
نویسندگان English
Currently, a new generation of remote sensing satellites with high image collection capacity and rapid targeting is being developed. For remote sensing satellites, capabilities such as rapid maneuvering, high pointing accuracy, and attitude stability are critical. Moreover, with the increasing use of large and flexible structures, such as solar panels and antennas, in satellites, dynamic phenomena arising from structural flexibility have become one of the main issues in the design and implementation of the attitude control subsystem. This study first examines the challenges and conventional architectures of attitude control for flexible satellites. Subsequently, a review of dynamic modeling methods for flexible satellites is provided, analyzing their accuracy, computational efficiency, and suitability for control design. In this context, the dynamic characteristics of flexible satellites and the coupling between rigid-body motion and structural vibration modes are investigated. The paper then reviews various control approaches and modern methods based on optimal control, neural networks, nonlinear control, robust control, and adaptive control. The advantages and limitations of each method are compared in terms of control accuracy, robustness to uncertainties and external disturbances, absence of overshoot, possibility of performing rapid imaging maneuvers, and implementability. Furthermore, practical issues such as vibration suppression methods, including active control and input shaping, are discussed. Finally, recommendations are presented to develop effective strategies for attitude control and vibration suppression in flexible remote sensing satellites.
کلیدواژهها English