Hybrid actuator consisting of Control Moment Gyro (CMG) and Reaction Wheel (RW)
possesses both the advantages of providing control using CMGs and offering high-precision …

PROGNOSTIC methods can be categorized as data driven [1–3], model based, and hybrid.
In this study, a model-based prognosis approach is considered due to limited access to …

This paper presents novel design concepts and a robust sliding mode control (RSMC)
algorithm for a solar sail optimized for an Earth-orbit-raising demonstration mission. The …

A reaction wheel is a well-known actuator for controlling the attitude of a spacecraft. It is a
momentum exchange device that typically consists of a brushless direct current motor with a …

The Kepler spacecraft had lost two of its four reaction wheels by 2012, and the Kepler
attitude engineers were forced to create a novel concept of operations to continue the …

In this paper, a comparison study between gyro-based and gyroless approaches for
spacecraft attitude estimation is presented. Due to its vulnerability to the model errors, the …

The next-generation space missions, such as the space moving target tracking mission and
the agile attitude maneuvering mission and so on, propose a high requirement on spacecraft …

Abstract Development of nanosatellites with CubeSat stan-dard allow students and
professionals to get involved into the aerospace technology. In nanosatellites, attitude plays …

This paper presents some approaches to the design and some experimental results for a
reaction wheel (RW) current and speed control loops. Reaction wheels are largely …

This paper presents some approaches to the design and some experimental results for
current and speed control loops of a reaction wheel (RW). Reaction wheels are largely …