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BMW-(Airbag ECU) Standard Introduction

Among the corporate requirements of this manufacturer, the one applying to the restraint system control unit is the clearest illustration of why component standards are written by function rather than by technology. An airbag control unit must not deploy the restraint when it should not, and must deploy it when it should, and those two requirements pull in opposite directions when the behaviour of the accelerometer and its signal path is considered: interference that the unit interprets as a crash is a hazard in itself, while filtering that suppresses interference may delay a genuine deployment. The requirement therefore concentrates on the failure modes that matter for the function, distinguishing the disturbances that must not cause a deployment from those the unit must tolerate without loss of the ability to deploy, and it applies at the level of the sensor, the signal path and the actuator output. The document is read together with the manufacturer's general component requirement.

BMW-(Airbag ECU) standard satisfiable test: Transient Pulse Immunity Testing 、 Supply Voltage Variation Testing 。
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