Reliability of Microcomputer Systems Using Triple Modular Redundancy.

摘要

Triple Modular Redundancy (TMR) is a classical technique for improving the reliability of digital systems. However,applying TMR to microcomputer systems may not improve overall system reliability because voter circuits may contribute as much to system unreliability as the microprocessors themselves. Issues are examined that affect the effectiveness of TMR for microcomputer systems,including voter unreliability,considerations for transient recovery,and reliability of semiconductor memory systems. With careful application, TMR can improve the mission time of a small system by a factor of three or more. (Author)