A Comparative Study of Actuator Configurations for Satellite Attitude Control

Comparative Study on Space Qualified Paints Used for Thermal Control of a Small Satellite

transference of imagery: a comparative formalistic study of shakespeares hamlet and its two persian translations

هدف از این تحقیق بررسی انتقال صور خیال هملت در دو ترجمه ی فارسی آن از نظر فرمالیستی بود. برای بدست آوردن داده-های مورد نیاز، 130 نمونه استعاره، مجاز، ایهام، کنایه و پارادوکس در متن اصلی مشخص شده و سپس بر اساس مدل نیومارک (1998) برای ترجمه ی استعاره یا بطور کلی زبان مجاز با معادل های فارسی شان مقایسه گردیدند. این تحقیق بر آن بود تا روش های استفاده شده برای ترجمه هر کدام از انواع زبان مجاز ذکر شد...

Design and Analysis of Gimbal Thruster Configurations for 3-Axis Satellite Attitude Control

The satellite thruster's configuration plays also an important role in providing the attitude control torques. In this paper, after discussing the gimbal thruster's structure and its benefits, several configurations based on 2, 3 and 4 gimbal thrusters are investigated in order to identify the most suitable orientation that consume less fuel and raise reliability. Then, a 3-axis attit...

Nonlinear-Fuzzy Based Design Actuator Fault Diagnosis for the Satellite Attitude Control System

Abstract. The objective of this paper is to develop a hybrid scheme (nonlinear observer and fuzzy decision making) for fault detection and isolation (FDI) in the reaction wheels of a satellite. Specifically, the goal is to decide whether a bus voltage fault, a current fault or a temperature fault has occurred in one of the three reaction wheels and further to localize which fault has occurred. ...

Fault Tolerant Attitude Control for Flexible Satellite with Uncertainties and Actuator Saturation

A novel fault tolerant control scheme, using model‐based control and time delay control theories, is proposed for flexible satellites with uncertainties and actuator saturation and the stability condition of the scheme is analysed. The moment–of‐inertia uncertainty, actuator faults uncertainty, space environment disturbances and the actuator saturation are...