Hardware Redundancy Techniques Research Articles

Reconfigurable Redundancy Management for Aircraft Flight Control

A highly fault tolerant digital computer system has been configured based on extensive experience with flight proven, redundant digital flight control systems. The feasibility of minimizing hardware complexity is shown while maintaining high levels of fault tolerance. The emerging hardware design combines reconfiguration concepts with conventional hardware redundancy techniques and special operational software to provide dual fail operate performance with a basic triplex system. The design provides high reliability and flight safety, enhances maintainability, and reduces life cycle cost while offering improved performance for future aircraft.

Reliability Modeling and Analysis of General Modular Redundant Systems

Hardware redundancy has been used in the design of fault-tolerant digital systems. A synthesis of protective hardware redundancy techniques is proposed and a generalized reliability model suitable for many fault-tolerant configurations is developed. This model, to be called General Modular Redundancy (GMR), yields as particular cases several known models of redundant structures.

On the Properties of Error Correcting Codes for Improving the Computer's Memory Reliability

The general theory of error correcting code is hereby presented together with their applications in the different parts of computer's memory circuitry to improve the overall performance of computer system. Advances in coding theory have made error correcting code more applicable than any other technique. Error correcting codes are most useful for system realiability when they are combined with other software and hardware redundancy techniques, such as, system replication, programming re-entry, reconfiguration and so on. In this paper after making an investigation from the present status of error correcting codes used in computing systems, attempts are made to show the applicability of different known and also some new codes for fruitful and economical use in increasing the reliability of digital systems.