نوع مقاله : گرایش دینامیک، ارتعاشات و کنترل
نویسندگان
1 نویسنده مسئول: استادیار، پژوهشکده فضانوردی، پژوهشگاه هوافضا، تهران، ایران
2 دانشجوی کارشناسی ارشد، پژوهشکده فضانوردی، پژوهشگاه هوافضا، تهران، ایران
3 دانشیار، پژوهشکده فضانوردی، پژوهشگاه هوافضا، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this paper, a robust hybrid control approach for vibration and attitude control of a flexible rotating structure as a fully coupled rigid-flexible system is investigated. Two control algorithms as a combination of second-order super twisting-nonsingular terminal sliding mode control (SMC) considering external disturbances and system uncertainties are developed. The nonlinear dynamic equation of the motion is derived via the Lagrangian approach and the finite element method. The non-singular terminal SMC leads to high accuracy in target tracking, and convergence and the super twisting part significantly reduce the chattering phenomenon. The overall stability of the system has been guaranteed using the Lyapunov theory. The simulations in the form of a comparative study (with agility, accuracy, and high convergence criteria) show the feasibility of performing large-angle maneuvers and significantly reducing the vibrations caused by the flexible parts. Moreover, by controlling the chattering phenomenon, the system performance regarding high-frequency modes excitation is increased.
کلیدواژهها [English]