High-reliable fault-tolerant system based on bus network

Abstract

The invention discloses a high-reliable fault-tolerant system based on a bus network. The fault-tolerant system comprises a simulation IO (Input Output) control module, an interface and switching module, an onboard flight control and integrative computation module, a high-performance processing module, a digital IO control module, a router module, and dual-redundancy isomorphic modules corresponding to above six modules; the six modules and the corresponding dual-redundancy isomorphic modules compose four network connections to realize the dual-redundancy hot backup; and thus, the fault-tolerant capacity of the dual-redundancy system is improved through the dual-ring topological structure by using the SpaceWire interconnected bus architecture. Based on a plurality of point-to-point bus interconnected bridge connections, the fault-tolerant system provided by the invention realizes the faster and stronger system fault-tolerant capability by using the dual-ring topological structure.

Description

technical field [0001] The invention belongs to the technical field of embedded system design in aerospace applications, and in particular relates to a highly reliable fault-tolerant system based on a bus network. Background technique [0002] Traditional aerospace high-reliability embedded computers mostly adopt the method of multi-module dual-redundant hot standby, and the system's dual-channel redundant bus mostly uses CAN, 1553, AFDX, etc. Such a dual redundant structure has two obvious disadvantages. First, the system is sensitive to multiple failures. In addition, the traditional space-oriented application buses such as CAN, 1553, and AFDX have low speeds, which cannot meet the requirements of fast and reliable transmission of aerospace product data processing. [0003] With the increasing demand for high reliability and high performance of military aerospace products, aerospace embedded computer products are required to have higher fault tolerance and higher communi...

AI Technical Summary

Problems solved by technology

However, the current dual-redundant system can only tolerate single-mode failures, and the failure of one bus interface will cause the failure of the entire computer system

Another limiting factor of the dual redundant bus architecture is the low bus bandwidth, which can only support 1Mbps or 4Mbps control signals, and does not support the requirements of high-speed interactive transmission of data streams such as payload data output and information processing.

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