Redundancy (engineering) Totally Explained

Everything about Redundancy Engineering totally explained

Redundancy in engineering is the duplication of critical s of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe.
In many safety-critical systems, such as fly-by-wire aircraft, some parts of the control system may be triplicated. An error in one component may then be out-voted by the other two. In a triply redundant system, the system has three sub components, all three of which must fail before the system fails. Since each one rarely fails, and the sub components are expected to fail independently, the probability of all three failing is calculated to be extremely small. Redundancy may also be known by the terms "Majority voting systems" or "voting logic".

Forms of redundancy

There are four major forms of redundancy, these are:

Hardware redundancy, such as DMR and TMR
Information redundancy, such as Error detection and correction methods
Time redundancy, including transient fault detection methods such as Alternate Logic
Software redundancy such as N-version programming

Further Information

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