Further Non-Deployment and Deployment Laboratory Experiments Using a Toyota Auris 2007 Event Data Recorder

The experimental campaign discussed in publication 2019-01-0635 was extended to emulate more vehicle parameters and also to increase severity leading to deployment event. The engine RPM and Accelerator Pedal Position (APP) where emulated using LabVIEW and added to the previously reported emulated parameters of wheel speeds and brake status. The engine RPM and APP where made to follow realistic increases and decreases so that the pre-crash data was representative of the associated wheel speeds and brake status. Overlapping non deployments events were generated and the EDR data is presented enriched with additional (faster) CAN bus data sniffed from the vehicle harness. The differences in values from EDR and CAN bus data are noted and discussed. While the non-deployment events were still generated using the rubber mallet in pendulum configuration as in 2019-01-0635, a series of tests were performed using an Izod pendulum to incrementally increase event severity until deployment event was generated. The Izod pendulum was instrumented with a rotational potentiometer to measure its instantaneous angle while laboratory accelerometers were used to separately measure acceleration. The Air Bag Control module was mounted in a box whose inertia was increased by using sand bags and hit by the Izod pendulum whose weight was increased by an additional 18kg. The post-crash period was lengthened by using crushable foam together with and adjustable hydraulic piston as damping. Apart from acting as damper, the hydraulic piston acted as a linear guide (preventing side movements on impact). Electronic circuitry was built (and is presented) to record the airbag deployment instance and synchronize it with the CAN bus data. Hence data acquired from the LabVIEW daq, CAN bus and EDR data were synchronized and are presented.