Efficient Chaotic Based Satellite Power Supply Subsystem
- Paper number
IAC-06-C3.2.09
- Author
Prof. Elbert E.N. Macau, Instituto Nacional de Pesquisas Espaciais (INPE), Brazil
- Coauthor
Mr. Takashi Yoneyama, Instituto Tecnológico de Aeronáutica - ITA, Brazil
- Year
2006
- Abstract
With the increasing complexity involved in spacecraft missions, the requirements over power supply are stringent each day. A satellite power supply subsystem is required to deliver a huge amount of power but keeping its main characteristics of compactness and low weight efficiently. The consequence of this scenario is that the traditional design techniques of power supply subsystems were pushed to its upper bound limit. As so, new non-traditional techniques are required to accomplish with the expanded requests on spacecraft missions. In this work, we investigate the use of the nonlinear-dynamics theory to increase the efficiency of the power supply subsystem. The core of a satellite power subsystem relies on its DC-DC converter. This is a very nonlinear system that presents a multitude of phenomena ranging from bifurcations, quasi-periodicity, chaos, coexistence of attractors, among others. The traditional power subsystem design techniques try to avoid these nonlinear phenomena so that it is possible to use linear system theory in small regions about equilibria points. Here, we show that more efficiency can be drawn from a power supply subsystem if the DC-DC converter operates in regions of high nonlinearity. In special, if it operates in a chaotic regime, we have an intrinsic sensitivity that can be exploit to efficiently drive the power subsystem over high ranges of power requests by using control of chaos techniques.
- Abstract document
- Manuscript document
IAC-06-C3.2.09.pdf (🔒 authorized access only).
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