This paper presents a new concept design for satellite attitude control. This new concept is based on the use of electroactive polymer beams which control the rotations of a satellite taking advantage of the angular momentum conservation of the whole system. By employing electroactive polymers, a compact and lightweight pointing system is obtained which allows to reduce the need of noisy spinni...

This report presents an account of the demand made by solar radiation pressure 6n the attitude-control system of an earth satellite whose external configuration is in the shape of a rectangular prism, the surfaces being assumed to be perfectly reflecting. Expressions determining the amount of angular impulse that must be supp~ed by an attitude-control system in the course of a year in order to ...

Abstract – A study of a three-axis stabilized satellite attitude control in geostationary orbit is presented. The analysis is based on a neural predictive approach using Kalman filtering algorithms. Optimization of a quadratic performance functional is used to determine the discrete predictive control actions. The control determination on a typical iteration is viewed as a stochastic optimal li...

SIS is a Satellite controller Integrated with Star sensors, which has been developed as a prototype model of a compact, low-cost satellite controller. SIS integrates attitude sensors into a star sensor and integrates several electronics for star identification, attitude determination, attitude control, and data handling into a single processing unit. SIS meets high reliability requirements by a...

The orientation of a satellite in space described relative to some other object or system is known as the attitude of the satellite. The attitude may be changing with time. To be able to control the attitude of the satellite, it must be equipped with actuators that can produce the required torque. Control Moment Gyroscope is a space craft control actuator which acts as torque amplifier. It is s...

Modern miniaturization technologies enable the realization of very small satellites at masses below 1kg, nevertheless limited attitude determination and actuator performances raise challenging control problems. Specific attitude determination aspects discussed at the example of UWE (University of Wuerzburg Experimental satellite), a standardized pico-satellite platform related to technology dem...

This paper presents an implementation of predictive functional control for imagebased satellite attitude control. The approach considers Low Earth Orbit small satellites equipped with an on-board camera for interactive Earth observation. The control goal is to keep a target on the Earth surface in the satellite’s camera field of view during orbiting of the satellite above the target. The contro...

Abstract This paper focuses on the description of design and performance MICROSCOPE satellite its drag-free attitude control system. The is derived from CNES’ Myriade platform family, albeit with significant upgrades dictated by unprecedented MICROSCOPE’s mission requirements. 300 kg microsatellite has completed 2 years flight higher-than-expected performances. Its passive thermal concept allow...

Neural networks offer a unique approach to controlling a dynamically changing system. By updating synaptic weights of an interconnected, algebraic framework, desired system objectives can be reached despite an unknown operating environment. This research implements a neural network for controlling the attitude of a satellite with unknown system disturbances. The training and updating of the con...