نویسنده
پژوهشکده علوم و فناوری فضا، دانشگاه صنعتی امیرکبیر، تهران، ایران
چکیده
در این مقاله سناریوی تصویربرداری به صورت استریو توسط یک ماهواره سنجش از دور بیان میشود. سپس به منظور انجام مانورهای مورد نیاز جهت اجرای این سناریو توسط ماهواره، یک سیستم کنترل وضعیت مناسب برای انجام مانورهای زاویة بزرگ و با استفاده از 4 چرخ عکس‌العملی با ساختار هرمی طراحی میشود. این سیستم کنترل وضعیت به گونه‌ای طراحی میشود که قابلیت نشانه‌روی به سمت مرکز زمین و انجام مانورهای سریع و حفظ وضعیت مناسب ماهواره برای اخذ تصاویر مختلف از یک منطقة مشخص و از زوایای گوناگون را برای ماهواره فراهم آورد. سپس یک بستر سخت‌افزار در حلقه (Hardware in The Loop)جهت تست عملکرد سیستم کنترل وضعیت طراحی شده، ارائه میشود. این بستر سخت‌افزاری، قابلیت تست الگوریتمهای کنترل وضعیت را به صورت زمان حقیقیو در یک بستر سخت‌افزاری، فراهم می‌آورد. در این بستر، مدل‌سازیبلادرنگ دینامیک ماهواره، اغتشاشات محیطی وارد بر آن و مدل دقیق چرخ‌های عکس‌العملی و حسگرهای ژیروسکوپ در کامپیوتر شبیهساز انجام میشود و عملکرد الگوریتم کنترل وضعیت طراحی شده برای تحقق مأموریت تصویربرداری استریو، به صورت زمان حقیقی بررسی میشود.
کلیدواژه‌ها
عنوان مقاله [English]
Design and Implementation of Attitude Control Systemof a satellite with Stereo-Imaging Scenario in Hardware in the Loop Test Bed
نویسنده [English]
- Farhd Fani Saberi
Space Science and Technology Research Institute, Amirkabir University of Technology, Tehran, Iran
چکیده [English]
In this paper, achieving of Stereo-Imaging scenario by a remote sensing satellite will be presented. Then a suitable attitude control system will be designed using 4 reaction wheels with pyramidal structure to fulfill large angle maneuvers of stereo-imaging scenario. The proposed attitude control system provide the satellite with the capability of nadir pointing and large angle maneuvers to take different images of a predefined zone from different point of view. In order to verify the performance of the designed attitude control system, a low-cost real time hardware in the loop test bed will be constructed. The constructed test bed is capable of assessing attitude control algorithms in a real time conditions. In the proposed test bed, accurate and real time modeling of satellite dynamics, space conditions, reaction wheels and gyroscopes will be done by the Simulator computer. Finally, performance of the designed attitude controller to achieve stereo-imaging scenario is investigated by implementing the algorithm in the hardware in the loop test bed in a real time condition.
کلیدواژه‌ها [English]
- Attitude control
- satellite
- Stereo
- imaging scenario
- real
- time simulator
- Hardware in the loop
- Reaction wheels
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