توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Reaction Wheel Functional Modeling Based on Internal Component
اطلاعات انتشار: هفتمین کنفرانس ملی مهندسی برق و الکترونیک ایران، سال
تعداد صفحات: ۵
Reaction wheel model is considered as actuator of satellites attitude control subsystem and it is used for confirming wheel design, designing attitude control subsystem and detecting its fault. In this paper, based on general structure of reaction wheels, a modeling is so presented that input and output behavior of the wheel would be similar to wheel model. Hence, electric motor, bearing, dynamic and static imbalance of the flywheel and driver are modeled and then a proportional–integral controller is designed for electric motor. To model components, governing relations and equations are expressed and then presented model of the reaction wheel is simulated. After discussing results of hardware in the loop, modeling is validated.<\div>

۲Small Satellite Attitude Control System Designing with four Thruster for Stereo Imaging Mission
اطلاعات انتشار: هفتمین کنفرانس ملی مهندسی برق و الکترونیک ایران، سال
تعداد صفحات: ۷
In this paper, stereo type imaging scenario by a small satellite at the height of 500 km above the earth (LEO satellite) is described first. After that, to perform great maneuvers required for the satellite to do this scenario, a four thruster structure with local details on the body is designed and this structure is used as the satellite actuators. Then, because of considering effects of thruster on the problem, model and layout of the thrusters is extracted. A pulse–width pulse frequency (PWPF) modulator is used for converting continuous torque of the controller to a pulse torque generated by the thruster. Finally, moment of inertia changes caused by fuel consumption of thrusters is modeled and performance of the controller designed according to control requirements is evaluated by simulations.<\div>
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