Decentralized Control for a Fault-Tolerant, Fully Scalable Microprocessor Power Supply for Spacecraft Applications
Résumé
This paper deals with the decentralized control method applied to a multiphase synchronous buck converter to provide a fault-tolerant microprocessor power supply for space applications. The system with decentralized architecture presents higher robustness (e.g. fault tolerant and scalable) and better performance compared to a centralized one. The investigations introduced in this paper make decentralized control an attractive solution to the challenges faced in power management design, for the next generation of satellites. This solution has not yet been investigated for space-based systems and its basic principles are presented here for analog system implementations into an application-specifi c integrated circuit (ASIC). In this paper, early-stage analyses are introduced taking into consideration the performance of the converter. Preliminary results in CADENCE’s OrCAD PSpice environment show that the proposed approachensures scalability, stable operation of the converter and possible reconfiguration modes in case of fault occurrence. Further results will be presented in the fi nal version. This work is part of a European project involving satellite manufacturer teams and scientific partners.
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