For what it is worth....
Even in a very simple system one of the major factors in determining airbag deployment is the inertia/G sensor. I was able to see this first hand while doing security vehicle training a few years ago. One of the exercises involves ramming a vehicle with an evading vehicle. The biggest eye opening lesson was that if you were accelerating when ramming the other vehicle you would not trip the air bags. We performed the exercise real time at least 10 times. Not once was there any airbag deployment. In older vehicles the inertia/g sensor(1990's) is only looking for a rapid deceleration combined with a high G impact. This usually means applying brakes and decelerating from 35 mph or more along with an abrupt impact.
Even in a very simple system one of the major factors in determining airbag deployment is the inertia/G sensor. I was able to see this first hand while doing security vehicle training a few years ago. One of the exercises involves ramming a vehicle with an evading vehicle. The biggest eye opening lesson was that if you were accelerating when ramming the other vehicle you would not trip the air bags. We performed the exercise real time at least 10 times. Not once was there any airbag deployment. In older vehicles the inertia/g sensor(1990's) is only looking for a rapid deceleration combined with a high G impact. This usually means applying brakes and decelerating from 35 mph or more along with an abrupt impact.