Time determinacy distributed spacecraft electronic system design method

Abstract

The invention discloses a time determinacy distributed spacecraft electronic system design method which solves the problems that an existing spacecraft electronic system is insufficient in expansibility and poor in data transmission time determinacy. The method comprises the steps of adopting a hierarchical analysis method to determine function distribution of a spacecraft electronic system; selecting a time-triggered Ethernet as a backbone network of the electronic system, adopting a distributed architecture on a network topology structure, and distributing system computing functions to a plurality of pieces of equipment; planning a task to be executed by an electronic system, estimating the use condition of system resources in advance, and realizing static configuration of computing resources in a pre-allocation manner; and planning a message transmission mode according to the priority, so that the high-priority message has higher time determinacy and transmission reliability under the condition of meeting the required bandwidth.

Description

technical field [0001] The invention proposes a time-deterministic distributed spacecraft electronic system design method, design time-deterministic network technology and spacecraft electronic system design technology, and belongs to the field of spacecraft electronic system design. Background technique [0002] With the increasing functional complexity of spacecraft, the amount of communication information and the degree of integration continue to increase, the electronic systems on spacecraft are developing in the direction of modularization, integration and standardization. The design of the spacecraft electronic system not only determines the physical structure of the system and the way of information interaction, but also directly affects the development and verification, testability and operability of the system. [0003] Traditional spacecraft electronic systems in my country usually use point-to-point connections (RS422, star structure of self-defined synchronous se...

AI Technical Summary

Problems solved by technology

The characteristics of this type of system are that there are many single-machine interfaces and interconnection cables in the system, and the volume, weight and power consumption are large; the system scalability, especially the in-orbit scalability, is poor.

At the same time, this type of system adopts an event-based communication mechanism, which adopts a bus preemption mode based on priority scheduling. Although event triggering and priority preemption enhance the flexibility of bus access, there is an uncertainty problem of information transmission delay.

With the successive development of tasks such as on-orbit operation, rendezvous and docking, space attack and defense, and on-orbit module replacement of my country's spacecraft in the future, the requirements for system scalability and message transmission certainty, reliability, and security are particularly prominent. Traditional spacecraft electronic systems Architecture Difficult to Meet Application Requirements

Images