The concept of signal integrity as a measure of trustworthiness of data is described using a simple analogy. Contrasts are drawn between integrity and accuracy in regard to the use of the data in a safety related application. The concept of 'false plausibility' of data is described, with associated failure modes of the analogy examined. An implementation of a yaw rate sensor is described that takes advantage of the use of continuous numeric analysis of the control loop variables to provide very high levels of loop observability in real time. It also considers detectability of failures in times significantly less than the time constant of the sensing system, i.e. fault detection that is not bandwidth limited. Also considered are feedback as a means of verifying the conversion processes within the sensor, and parallel verification of the operation of the sensor software and microcode by using pseudo-random seed data from the sensor.
Trusting your senses
Vertrauen auf eigene Empfindungen
2008
14 Seiten, 6 Bilder, 1 Tabelle
Aufsatz (Konferenz)
Englisch
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