Multi-machine time scale simulation method suitable for multi-machine fault-tolerant architecture of attitude and orbit control system

Abstract

According to the multi-machine time scale simulation method suitable for the multi-machine fault-tolerant architecture of the attitude and orbit control system, independent and mutually exclusive data spaces are designed in a shared memory of multiple machines, a data basis is provided for unified management of time scales, a mode of multiple times of time scale synchronization is adopted, the data exchange and transmission process in the shared memory of the multiple machines is subjected to stage division, multiple machines are in a synchronous state in different data processing stages, non-synchronous data are prevented from being introduced into calculation, task-level multi-machine time scale unification is achieved, then a synchronous controller is designed, the synchronous controller is used for communicating with all the machines, synchronization is carried out with simulation time as a control reference, high-priority synchronous parameters are designed, the single-machine debugging process and the multi-machine time mark unification are no longer contradictory, and the system-level multi-machine time mark unification is realized. Finally, the problem of multi-machine time scale unification under a fault-tolerant architecture is solved, the simulation method not only realizes task-level time scale unification, but also realizes system-level time scale unification, and is successfully applied in a space station simulation environment at present.

Description

Technical field [0001] The present invention is a multi-machine time standard simulation method suitable for multi-machine fault tolerance architecture of post-rail control systems, belonging to aerospace attitude track control system simulation. Background technique [0002] For manned spacecraft posture, the reliability requirements are extremely high, and it is necessary to have the ability to have multiple faults. Therefore, based on "Byzantine" fault tolerance architecture, the arbitration judgment according to the fault tolerance algorithm, find a fault, and then Exclude outside the system. Based on this considering, a multi-machine-oriented manner based on Byzantine is designed to ensure safe and stable operation after multiple failures in the system. Corresponding to this, the simulation environment should also have a multi-machine full digital simulation ability, so how to achieve multiple machine time standards in multi-machine fault tolerance is the problem that must b...

AI Technical Summary

Problems solved by technology

However, the premise of sending to other stand-alone machines is that the collection work of the stand-alone machine has been completed, and according to the existing unified management time stamping method, there is a possibility that a stand-alone machine is forced to send its own data to other stand-alone machines before collecting its own data, resulting in data Pollution

Secondly, the GNC calculation is performed after each stand-alone machine obtains the full-envelope data. If there is no unified time scale management, it will cause a stand-alone machine to start GNC calculation before obtaining the full-envelope data, and GNC control malfunction occurs. Phenomenon

[0004] (2) When multiple machines are running in parallel, when debugging is required, it is inevitable that a single machine will stop running after setting a breakpoint. According to the existing method of unifying the time scale with the simulation cycle as the granularity, only setting a breakpoint The stand-alone machine stops running, while other stand-alone machines continue to run until the end of the simulation cycle, which will cause confusion in the multi-machine simulation and fail to realize the real multi-machine parallel operation

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