Simulation study investigating the novel use of drive torque vectoring for dynamic post-impact vehicle control

The work presented here investigates the use of drive torque vectoring as a method of post-impact vehicle control. To this end, a non-linear 8 Degree of Freedom model is developed that is capable of simulating a vehicle’s behaviour and trajectory during a crash instigated by an impulse disturbance. These crash impulse disturbances are calculated using momentum theory, taking into account energy loss during the impact. They are used to simulate two vehicle crash scenarios: a rear impact, and a side swipe impact. Simulation of these crash scenarios is carried out on the vehicle model before drive torque vectoring control is implemented to produce a benchmark set of results against which the controlled system is evaluated. The control system presented is a six-phase switched PID controller scheme using a set of ‘Settling’ and ‘Holding’ controllers. The control objective is to settle the vehicle at a heading angle that is parallel to the original (e.g. 00, 1800 or 3600), such that the final trajectory re-aligns the main crash structures of the vehicle with the carriageway so as not to expose the side of the vehicle to a secondary collision. Re-aligning the vehicle with the carriageway before it has come to a stop has the additional benefit of reducing lateral displacement when compared with the benchmark results. This control action results in a reduced risk of a secondary impact and thus of serious injury. This system resulted in safe heading angles for all simulations compared with the current work in the field, leading to safer outcomes for occupants.

Language

  • English

Media Info

  • Pagination: 1 file

Subject/Index Terms

Filing Info

  • Accession Number: 01596283
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Apr 20 2016 1:55PM