57C411 | RELIANCE | Temporal redundancy module

Description

57C411 | RELIANCE | Temporal redundancy module

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Time 57C411  refers to the execution of safety critical tasks in a redundant manner, which changes over time. As these redundant tasks change over time, they help eliminate transient faults. Among them, time redundancy on a single hardware channel refers to using the same software to perform multiple safety critical tasks on the same hardware, and then comparing the results of multiple calculations. If differences are found, perform relevant corrective actions. The “Software Diversity Redundancy” (a hardware channel) described in the “Software Redundancy” section above is an extended version of this type of redundancy.

Time 57C411  on parallel hardware channels refers to the execution of all safety critical tasks on parallel channels, but not simultaneously, which helps to create redundancy over time. Instantaneous faults will not affect operations in the same way, even if parallel channels are symmetric hardware. The “delay lock step” described in the “hardware redundancy” section above is an example of such time redundancy.
The automotive 57C411  uses various design technologies to achieve safety, and various redundant technologies are essential to achieve safety, with the aim of ensuring that equipment is more reliable and stable in the event of failure. The advantage of hardware redundancy is the ability to detect faults as early as possible, but the cost is the need to increase the number of hardware. On the other hand, if the system cost is limited, software redundancy may be more useful. In short, redundancy is the key to improving the safety performance of automobiles. Hardware and software redundancy, as well as information redundancy and time redundancy, can be utilized to make the system more stable and reliable.

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