Fault injection system for embedded spaceborne computer and injection method thereof

Abstract

The invention discloses a fault injection system for an embedded spaceborne computer and an injection method thereof, which are mainly used for software evaluation of the operation system of the spaceborne computer. The fault injection system for the embedded spaceborne computer comprises a Digital Signal Processor (DSP), a Random Access Memory (RAM), a FLASH, a Joint Test Action Group (JTAG) controller, and one or more Field Programmable Gate Arrays (FPGAs) (one of which is a fault injection FPGA) and an interface circuit, wherein the DSP processor and the fault injection FPGA are provided with boundary scanning units; the Test Compatibility Kit (TCK) and the Time-Multiplexed Switching (TMS) signal terminals of a chip are connected in parallel; the Total Domestic Output (TDO) signal terminal of a front-stage apparatus and the Transport Driver Interface (TDI) signal terminal of a rear-stage apparatus are connected in series to form a daisy chain. The device is simple and is capable ofshortening evaluation time and reducing evaluation cost; a signal level is directly controlled in the computer without special external instruments; signals needing to control influence can be flexibly selected to have a relatively large fault coverage rate; therefore, the reliability and the fault-tolerant capability of the embedded spaceborne computer can be more comprehensively verified.

Description

Technical field: [0001] The invention is mainly applied to the evaluation of the software fault-tolerant mechanism of the embedded on-board computer, and is applicable to the embedded on-board computer with the boundary scan interface and the FPGA chip. Background technique: [0002] With the development of my country's space exploration, people's requirements for the reliability of spaceborne systems are getting higher and higher. According to the statistics of NASA in 1996, satellite failures caused by single event effects accounted for 80% of the total number of failures caused by space radiation effects. Fault-tolerant technology is an important method to improve the reliability of spaceborne computer systems. In order to ensure the correctness of fault-tolerant design and the efficiency of fault-tolerant mechanism, it is necessary to use auxiliary technology to verify the fault-tolerant system. There are three main methods of fault-tolerant verification: analysis model...

AI Technical Summary

Problems solved by technology

Its main disadvantages are that the experimental device is complicated, the cost is high, and it is easy to cause damage to the target system hardware.

Although there are certain deficiencies in the fault injection method implemented by hardware, hardware fault injection is still a necessary means to verify the fault-tolerant system of space-borne computers compared to the importance of the reliability of space-borne computers.

Images