Cold backup double-machine switching circuit

Abstract

The invention discloses a cold backup double-machine switching circuit, which comprises a host machine part and a backup machine part corresponding to the host machine part on circuit structure, wherein the host machine part comprises a host machine power supply circuit, a host machine switch relay and a host machine secondary power supply converter which are connected in turn; the output of the host machine secondary power supply converter is connected with the input of a host machine CPU controller and the input of a dog bite and backup electromechanical circuit respectively; the output of the host machine CPU controller is connected with a switch-off backup electromechanical circuit and is in bidirectional signal connection with a host machine cold / hot start mark circuit at the same time; and the output of the switch-off backup electromechanical circuit is connected with a host machine remote measuring switching circuit. The host machine switch relay and the backup machine switch relay are connected with direct instructions respectively, wherein the direct instructions comprise host-on backup-off instruction and backup-on host-off instruction; the output of the dog bite and backup electromechanical circuit and the output of the switch-off backup electromechanical circuit are connected with the backup machine switch relay; and the output of the dog bite and host electromechanical circuit and the output of the off host electromechanical circuit are connected with the host machine switch relay.

Description

technical field [0001] The invention relates to a cold backup onboard computer system reconfiguration circuit. Background technique [0002] The computer of the small satellite mission center is a dual-computer system mainly based on cold storage. In the original design, the telemetry switching circuit, power grab circuit and system initial state control circuit are all in the public power supply area, which is a long-term uninterrupted power supply part. From the perspective of reliability design, although this part of the circuit will not cause a single point of failure under the premise of not considering double faults, the cold reserve depth of the system will be further improved, the mechanism of dual-machine switching will be optimized, and the existing public circuits will be eliminated. It will be beneficial to the further improvement of system reliability and service life. [0003] In the original design, if the host computer resets itself after a watchdog biting ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art that system reconfiguration cannot occur smoothly, and provide a dual-machine switching circuit that is beneficial to long life, high reliability application requirements, elimination of long-term power-on parts, complete cold backup and low power consumption

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