Triple-redundancy control computer and fault-tolerant control system

Abstract

The invention discloses a triple-redundancy control computer and a fault-tolerant control system. The triple-redundancy control computer comprises a switching value voting array module and three completely-independent sub-computers. The switching value voting array module receives switching value control signals output by the three sub-computers, backs up the switching value control signals, and outputs switching value power control instructions through a hardware voter. Each sub-computer determines a left computer and a right computer which correspond to the sub-computer according to a left and right computer role definition table. Each sub-computer comprises a synchronous module, a self-detection module, a left computer detection module, a right computer detection module, a duty control module, a host module and a switching value control output module. According to the triple-redundancy control computer and the fault-tolerant control system, on the basis of meeting the requirement of the system for hard real-time performance, more single-computer fault modes can be tolerated, the overall high reliability of the system is improved, and the software and hardware expenses are reduced.

Description

technical field [0001] The invention relates to a triple redundant control computer and a fault-tolerant control system. Background technique [0002] Under the condition of certain reliability level of components and stand-alone products, redundant fault-tolerant technology is usually used to improve the overall reliability of the computer control system, such as dual-machine backup / dual-mode redundancy, triple-mode redundancy (TMR) and other redundancy technologies have been It is widely used in aircraft control systems with high reliability requirements. [0003] The dual-mode redundant system improves system reliability by adding a set of homogeneous hardware devices. The general technical solution is that the two machines collect data synchronously, process the data, and generate data output at the same time and send it to the voting device for comparison of the output data: when the output data results of the two machines are the same, it indicates that the system is ...

AI Technical Summary

Problems solved by technology

On the one hand, this technical solution increases the complexity of system software and hardware, on the other hand, it increases additional time overhead and reduces the real-time performance of the system.

In addition, in some control systems, such as aerospace vehicle control systems, there are strict constraints on the weight and power consumption of control system supporting equipment (which can be divided into three categories: sensors / sensors, controllers, and actuators). Due to their different roles or functions, it is technically impossible or unnecessary for some sensors and actuators to adopt three-redundancy configuration, which constitutes a non-completely symmetrical three-redundancy redundant control system, while traditional three-redundancy control computers cannot suitable for this application

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