Search Results

This paper describes the physical behavior of rollover situations from a sensor and an algorithm point of view. Algorithm solutions will be described with an emphasis on the rollover / no-rollover discrimination as well as the misuse scenarios. Integration of the Siemens advanced rollover sensing functionality as part of future airbag electronics will be discussed. The Siemens rollover algorithm technology and the performance will be demonstrated on some examples.

One important topic in future automotive safety systems will be a better protection of the occupants in rollover situations. Convenient systems are belt pretensioner and head airbags and, for convertibles, rollover bars. For an in-time detection of an imminent rollover and an activation of these safety systems by an electronic control unit there can be used different sensors, for example angular rate sensors, accelerometers, tilt switches. All kinds of these sensors were used in a vehicle test program in order to find out the best sensor architecture for this purpose. By use of a rotation table which is controlled according to the signals of the angular velocity sampled in these tests the rotation of the vehicle about the longitudinal axis can be simulated. This test equipment is used for the validation of trigger algorithms for the safety systems.