Embedded real-time emulation and fault simulation system based on multiple data buses

Abstract

The invention discloses an embedded real-time emulation and fault simulation system based on multiple data buses, comprising upper computer simulation management software and an embedded real-time emulation and fault simulation device. The upper computer simulation management software guides the user to perform emulation configuration and fault setting aiming at a fault-tolerant control system to be tested through a human-computer interface, and generates fault emulation data of multiple redundancy equipment. The embedded real-time emulation and fault simulation device outputs the fault emulation data in real-time and synchronously through the multiple data buses, simulates the fault of the multiple redundancy equipment and outputs the fault data stream. The upper computer and a lower computer communicate mutually through an Ethernet to achieve the downloading of the information configuration, the fault emulation data and the emulation control command of the upper computer, and the uploading of the working condition of the lower computer. The invention overcomes the defects of poor universality and lower synchronous precision of the traditional multiple equipment fault simulation device based on the emulation, and is suitable for the test and the verification of the different redundancy fault-tolerant designs of the complex spacecraft system with numerous equipment and frequent data exchange.

Description

technical field [0001] The invention relates to an embedded real-time simulation and fault simulation system based on a multi-channel data bus, which belongs to the field of reliability testing and verification of spacecraft redundancy systems. Background technique [0002] High reliability is the basic requirement for spacecraft operation, and redundant fault-tolerant technology is an effective design measure to ensure high system reliability. For spacecraft redundant systems, effective testing methods are needed. By injecting faults into the redundant system under test, the fault tolerance of the system can be tested and the redundant design of the system can be verified. [0003] Existing test methods for spacecraft redundancy systems based on fault simulation are mainly divided into two types. One method obtains redundant system data in real time by connecting a fault injection device in the data transmission channel, then integrates fault information into the original ...

AI Technical Summary

Problems solved by technology

The fault simulation system using this hardware structure has the following problems of asynchronous transmission: ① Each synchronous bus interface card uses its own clock for timing independently, and the multi-channel timers have clock deviations, which will become significant as the simulation time increases

② The time when the industrial control computer controls each data bus to start data transmission is not synchronized, which will lead to a deviation in the timing starting point of each bus, which will become significant as the number of total lines increases

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