Fault-Tolerant Multiprocessing Unit for on-Board Satellite Supervision and Control

摘要

This work presents a standard for fault-tolerant 16-bit multiprocessing systems to be utilized on board of satellites for their supervision and control. The systems, defined by the proposed standard, are characterized by their modularity, easy adaptation to different satellites and tolerances to single-point failures. The methodology for the development of such a standard is also outlined. This is based on the organization of the fault detection, analysis/confinement and recovery techniques according to the logical hierarchical layers of the system. The proposed multiprocessing system is constituted by a set of 16-bit multiprocessing units interconnected by redundant busses. The techniques for fault-tolerance in a typical multiprocessing unit are presented stressing their structural interrelationship according to the following system layers: hardware, operating system and applicative processes.