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کنترل فعال ارتعاشات و پایدارسازی مقاوم چند جسمی صلب-انعطاف پذیر با الگوریتم مود لغزشی زمان متغیر | ||
مکانیک هوافضا | ||
مقاله 4، دوره 18، شماره 4 - شماره پیاپی 70، دی 1401، صفحه 49-63 اصل مقاله (1.71 M) | ||
نوع مقاله: گرایش دینامیک، ارتعاشات و کنترل | ||
نویسنده | ||
میلاد عظیمی* | ||
استادیار، پژوهشکده سامانههای فضانوردی، پژوهشگاه هوافضا (وزارت علوم، تحقیقات و فناوری)، تهران، ایران | ||
تاریخ دریافت: 12 تیر 1401، تاریخ بازنگری: 06 مرداد 1401، تاریخ پذیرش: 23 مرداد 1401 | ||
چکیده | ||
در این مقاله به طراحی کنترلرهای مقاوم هیبرید مود لغزشی توسعهیافته با سطح لغزش زمان متغیر و ارتعاشات یک فضاپیمای انعطافپذیر در مانور وضعیت پرداختهشده است. مدل دینامیک غیرخطی کاملاً کوپل صلب-انعطافپذیر شامل دوران سه محوره جسم صلب در تعامل با تغییرشکلهای عرضی پنلهای انعطافپذیر مجهز به حسگر/عملگرهای پیزوالکتریک میباشد. سیگنال هموار کنترلی شامل ترم تانژانت هایپربولیک و یک تابع تنظیم شدت سوئیچینگ بهمنظور کاهش اثرات چترینگ و تعدیل اثرات ناشی از تعاملات فرکانس بالای بخشهای انعطافپذیر و اغتشاشات خارجی با بدنه صلب و کنترلر میباشد. ساختار سطح لغزشی متغیر با زمان امکان تنظیم میزان اثر پارامترهای وضعیت (کواترنیونها و سرعتهای زاویهای) را بر عملکرد کنترلی فراهم ساخته است. همچنین ارتعاشات باقیمانده حین و پس از فاز دستیابی به هدف با بهکارگیری یک الگوریتم مقاوم کنترل فعال ارتعاشات، کاهشیافته است. شبیهسازیها در قالب مطالعه مقایسهای، عملکرد و برتری رویکرد پیشنهادی را در مقایسه با رویکرد کلاسیک کنترل مود لغزشی برای سیستمهای با انعطافپذیری سازهای در حضور اغتشاشات خارجی و نامعینیها نمایش میدهد. | ||
کلیدواژهها | ||
پیزوالکتریک؛ چترینگ؛ کنترل فعال ارتعاشات؛ سطح لغزش زمان متغیر؛ کنترل مود لغزشی؛ کنترل مقاوم | ||
عنوان مقاله [English] | ||
Robust Stabilization and Active Vibration Control of a Rigid-Flexible Multibody System Using Time-Varying Sliding Mode Algorithm | ||
نویسندگان [English] | ||
Milad Azimi | ||
Assistant Professor, Department of Astronautic, Aerospace Research Institute (Ministry of Science, Research and Technology), Tehran, Iran | ||
چکیده [English] | ||
This paper proposes robust hybrid sliding mode control with a time-varying sliding surface and active vibration control for a flexible spacecraft during attitude maneuver. The fully coupled nonlinear dynamic model of the rigid-flexible system includes the three-axis rotation of the rigid body in interaction with the transverse deformation of the smart PZT-mounted flexible appendages. The smooth control signal includes a hyperbolic tangent and a sharpness function to reduce the effects of chattering and high-frequency interactions of the flexible parts and external disturbances in interaction with the rigid body and controller. The structure of the variable sliding surface with time has made it possible to adjust the effect of attitude parameters (quaternions and angular velocities) on the control performance. Also, the residual vibrations during and after the reaching phase are suppressed using a robust active vibration control algorithm. The simulations in the form of a comparative study show the performance and superiority of the proposed approach compared to conventional sliding mode control approaches for systems with structural flexibility in the presence of external perturbations and uncertainties. | ||
کلیدواژهها [English] | ||
Active vibration control, Chattering, Piezoelectric, Robust control, Sliding mode control | ||
مراجع | ||
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