مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

تحلیل و صحه‌گذاری ریزاغتشاشات ناشی از میزان جرم نابالانسی عملگر چرخ عکس‌العملی با استفاده از میز کیستلر

نوع مقاله : پژوهشی اصیل

نویسندگان
پژوهشکده رانشگرهای فضایی، پژوهشگاه فضایی ایران، تبریز، ایران
چکیده
در این مقاله، منابع ریزاغتشاشات عملگر چرخ عکس‌العملی به تفصیل بررسی شده و تاثیر بخشی از این ریزاغتشاشات که ناشی از نابالانسی چرخ دوار است با روابط مربوطه بر روی میز کیستلر و بالانس موجود در پژوهشکده رانشگرهای فضایی، آزمون و مقایسه شده است. چرخ‌های عکس‌العملی که برای کنترل وضعیت در ماهواره‌ها استفاده می‌شوند اصلی‌ترین منبع اغتشاش منجر به اختلالات بر روی کارآیی ادوات نشانه‌روی هستند. لذا به‌منظور انجام موفقیت‌آمیز ماموریت ماهواره‌ها، بررسی، شناسایی و کاهش این منابع اغتشاشی امری ضروری است. به این منظور چرخ دوار طبق روابط و الزامات موجود در استاندارد اروپایی فضایی ECSS به روش جرم‌برداری بالانس شده و سپس مجموعه مونتاژی بر روی میز کیستلر آزمون و راه‌اندازی شد. انتخاب روش پله‌های سرعت ثابت یک هرتز فرکانس چرخشی و استخراج اطلاعات نیرو- گشتاور اندازه‌گیری‌شده، منجر به نمودارهای آبشاری شد و مقادیر نابالانسی استاتیکی و دینامیکی بر روی نمودار مذکور مورد تصدیق قرار گرفت. مقادیر نابالانسی استاتیکی و دینامیکی محقق‌شده ۰/۱ و ۰/۲گرم سانتی‌متر مربع هستند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Analysis and Validation of Micro-Vibrations Produced by Unbalance Mass of Reaction Wheel Actuator Using Kistler Table

نویسندگان English

M. Farhid
H. Amanpour Reyhani
H. Gouchi Esgandar
H. Beheshti Beyrami
Iranian Space Research Center, Space thrusters Institute, Tabriz, Iran
چکیده English

In this paper, sources of micro-vibration in a reaction wheel assemblies (RWA) are analyzed in detail and their effects arising from flywheel unbalance are tested based on the related equations and by using Kistler table in Space Thruster Institute. RWAs that are used in satellites to control their situations are the major sources of instabilities leading to disturbances in the performance of instruments with high pointing precision. Thus, for the purpose of successful satellite missions, it is important to identify, study, and reduce these sources. To align with this goal, flywheel was balanced according to the equations and the requirements of the ECSS European Space Standard before assembling on the Kistler test table. With the step of 1Hz of rotation frequency, force and torque details were obtained and plotted in waterfall diagrams. These led to the verification of values obtained for static and dynamic unbalances on the graphs. The values achieved for the static and dynamic unbalances were 0.1 and 0.2gr.cm2, respectively.

کلیدواژه‌ها English

Reaction Wheel
Micro Vibration
Dynamic Imbalance
Static Imbalance
Kistler Table
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