A Smooth Switching Dual-machine Redundant Power Distribution System Against Single Event Irradiation

Abstract

The invention provides a smooth-switching double-machine redundant power distribution system resistant to single-particle irradiation. The system comprises a main machine, a standby machine and a loadpower supply and distribution module, wherein the main machine and the standby machine serve as an on-duty machine and a non-on-duty machine alternately; the on-duty machine and the non-on-duty machine send respective health states and current working states to the opposite in real time to ensure that the non-on-duty machine and the on-duty machine are informed of the current working state of theopposite; the on-duty machine outputs a power distribution control signal to the load power supply and distribution module according to a preset time sequence or a received power distribution instruction input externally to control on / off of the load power supply and distribution module, a busbar voltage at the output end of the load power supply and distribution module is back-collected, and whether the power distribution instruction is executed correctly or not is judged according to the back-collection result; and when the instruction is not executed correctly, the on-duty machine sends the power distribution instruction to the non-on-duty machine through an internal serial port, an output control function of the non-on-duty machine is started temporarily, and the non-on-duty machine supplementarily executes the power distribution instruction once.

Description

technical field [0001] The invention relates to a smooth switching dual-machine redundant power distribution system resistant to single-particle radiation. It belongs to the technical field of power distribution. Background technique [0002] For aerospace measurement and control systems, special attention is paid to the reliability of single aircraft, especially the single aircraft of space vehicles. It is necessary to avoid erroneous output caused by the harsh environment of space. Usually, it is necessary to adopt the design method of three-aircraft redundancy or double-aircraft redundancy. [0003] (1) Three redundant machines [0004] Three-redundant processors are generally designed according to three-mode redundancy and two-out-of-three voting. Divided into two modes of tight coupling and loose coupling. The tightly coupled triple-mode redundant system has high reliability, but the system design is relatively complex and the amount of information exchanged is large...

AI Technical Summary

Problems solved by technology

The biggest difficulty of the three-redundancy technical solution lies in the synchronization mechanism between CPUs

[0012] (1) The triple-redundancy technical solution requires the use of three identical CPU boards, which requires high cost, and also limits the miniaturization of the equipment volume, and needs to ensure the synchronization between the CPUs;

[0013] (2) The dual-machine cold standby needs to manually start the equipment, and the switchover takes a long time;

[0014] (3) Dual-machine hot standby redundancy can solve the single point of failure caused by the complete failure of the equipment due to the environment or other factors, but it lacks effective correction capabilities for the occasional error output of a single channel; and increases the power consumption of a single machine

Images