Robust Adaptive Spacecraft Array Derivative Analysis

Robust Adaptive Control of a Large Spacecraft

This paper deals with the applicability of Robust Adaptive Control to the attitude motion control of large spacecraft. Large spacecraft and space structures, such as large communication satellites and the ISS (International Space Station), have been constructed on orbit. However dynamic characteristics of these structures can not be fully verified on the ground because of their size, mass and f...

Time-derivative adaptive silicon photoreceptor array

We designed and tested a two-dimensional silicon receptor array constructed from pixels that temporally highpass filter the incident image. There are no surround interactions in the array; all pixels operate independently except for their correlation due to the input image. The high-pass output signal is computed by sampling the output of an adaptive, high-gain, logarithmic photoreceptor during...

Spacecraft Multiple Array Communication System Performance Analysis

The Communication Systems Simulation Laboratory (CSSL) at the NASA Johnson Space Center is tasked to perform spacecraft and ground network communication system simulations, design validation, and performance verification. The CSSL has developed simulation tools that model spacecraft communication systems and the space and ground environment in which the tools operate. In this paper, a spacecraf...

Robust and Adaptive Nonlinear Attitude Control of a Spacecraft

In the context of the initiative Formation for Atmospheric Science and Technology demonstration (FAST), this dissertation describes the design and comparison of several nonlinear attitude controllers for TU Delft’s micro-satellite. The control requirements include robustness against model uncertainties and disturbances. To this end, five Backstepping schemes are selected for comparison: Standar...

Robust Adaptive Control of Rigid Spacecraft Attitude Maneuvers