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In frame of the European-Russian cooperation within the International Space Station Program a Fault Tolerant Computer assembly with associated crew-control station is under development in European industry. The on-board equipment, which is supposed to be accommodated within the data management and guidance navigation control system of the Russian Service Module, is complemented with a complete set of ground hard- and software required for the application software development and verification process as well as Service Module System integration and check-out. For the on-board fault tolerant computer state of the art technology will be implemented. The mechanism, that provides the required two failure tolerant feature, is based on the so-called Byzantine Failure algorithm. The fault detection and recovery algorithm, the data input/output and the application software are implemented on separate layers each containing its own processing capability, such that the application program runs independent of any failure calculations and data input/output. Hardware realization is based on state of the art microcircuits, in particular transputer processors to provide compact equipment size and fast data exchange mechanism. |
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