Given the few unsuccessful space missions in the past few decades, designing a fault-
tolerant spacecraft's attitude control has piqued the scientific and academic community's …

This paper proposes using TRIAD and Unscented Kalman Filter (UKF) algorithms in a
sequential architecture as a part of a small satellite attitude estimation algorithm. This …

This work addresses the problem of observer-based closed-loop attitude stabilization in the
presence of actuator faults, reaction wheel friction and external disturbances. As a stepping …

Sliding mode control (SMC) is widely used in many existing nonlinear control solutions due
to its capability against external disturbances and uncertainties, while the fractional order …

Small satellites use commercial off-the-shelf sensors and actuators for attitude determination
and control (ADC) to reduce the cost. These sensors and actuators are usually not as robust …

The attitude estimation of a spacecraft in low Earth orbit is considered with the design of two
different adaptation rules in the extended Kalman filter (EKF) algorithm. The adaptations are …

For CubeSats requiring high pointing accuracy and slewing agility, ground-based hardware-
in-the-loop simulations are strongly demanded to test and validate spacecraft subsystems …

In this paper, the attitude tracking system of a microsatellite consisting of a rigid main-
satellite, a flexible coilable mast and a rigid sub-satellite is studied. The attitude tracking …

Space systems are extremely complex and expensive robotic devices used in scientific,
military and communication applications. Attitude control for aerospace systems is …

The subject of this work is the implementation and experimental testing of a purely magnetic
attitude control strategy, which can provide stabilization after the deployment and pointing of …