Conventional adaptive control techniques have for the most part been based on methods for linear or weakly non-linear systems. More recently neural network and genetic algorithm controllers have started to be applied to complex, non-linear dynamic systems. The control of chaotic dynamic systems poses a series of especially challenging problems. In this paper an adaptive control architecture usi...

A Variable Speed Control Moment Gyro (VSCMG) is a relatively recent torque actuator device for spacecraft attitude control. As implied by its name, a VSCMG is a singlegimbal control moment gyro (CMG) with a flywheel having variable speed. Owing to this extra degree of freedom, a VSCMG can be used to achieve additional objectives, such as power tracking and/or singularity avoidance, as well as a...

Tripulse is a novel orientation/attitude estimation system that is designed to accurately estimate the orientation of a satellite borne phased array relative to one or more earth stations. This system has an accuracy potential that is signi cantly better than conventional Earth-Moon-Sun attitude sensors. Tripulse has conceptual similarities to amplitude comparison monopulse systems used in trac...

This paper investigates alternate control techniques for the attitude control of a three axis stabilized flexible communications satellite consisting of a large reflector and a solar array. The control configurations consisted of three classes: Class 1 sensors and actuators co-located on the central body, Class 2 actuator on the central body and sensors distributed, and Class 3 -actuators and s...

In spacecraft engineering a paradigm shift is emerging with the tendency from traditional, single, large, and multifunctional satellites towards cooperating, distributed small spacecraft systems. In particular modern miniaturization techniques allow realization of satellites with continuously smaller masses, and thus enable cost-efficient implementation and launch of distributed multi-satellite...

In this paper, a robust control solution for satellite equipped with robotic manipulator is presented. First, the dynamical model of system derived based on quaternions to describe evolution attitude base satellite. Then, non-singular terminal sliding mode controller that employs control, proposed concurrently handling all degrees freedom system. Moreover, an additional adaptive term embedded i...

This paper analyses the performance of an Attitude and Orbital Control System for the Olympus Satellite. The system was designed using HRT-HOOD and implemented in Ada 83 augmented with some of the facilities of Ada 9X. The program consisted of multiple tasks communicating via protected shared data areas. A worst case execution time analysis tool was used to estimate the execution time of each t...

This paper addresses the attitude determination and control problem for the University at Buffalo’s GLADOS mission. The main objective of the mission is to collect multi-band photometric data of resident space objects to improve space situational awareness. The team plans to use two optical payloads, a wide-field camera and a spectrometer, to achieve this goal. The attitude control system uses ...

The subject of this research is to study the use of internal moving masses as the primary means of attitude control for a small satellite platform. The goal of this research is to validate the dynamic model formulated in [1] which describes the under-actuated rotational dynamics of a 3U cubesat with two internal orthogonal linearly translating masses. Models have been developed to simulate angu...