IAVSD Colloquium on Stability and Bifurcations of Vehicle and Driver System

Activity: Participation in or organisation ofWorkshop, seminar or course (Participation in/Organisation of)


Scientific topic:
After a severe lane change, a wind gust or other disturbing occurrences, drivers could be unable to recover the intended motion even if the vehicle is stable and understeering. This fact is very well known by any driver, but it appears that the scientific investigation of this phenomenon is just at its beginning. In the literature, different mathematical models of car and driver have been used for the description of the car motion after a disturbance. Theoretical topics referring to non-linear dynamics, bifurcations and global stability analysis had to be tackled. Since accurate mathematical models of drivers are still object of scientific investigation, driving simulators need to be used to assess the influence of the human action on vehicle motion. Classic unstable motions like Hopf bifurcations – almost disregarded by automotive engineers, but very well known by mathematicians – should be further brought to the attention of the scientific and industrial community and used for future enhancements of vehicle technology. Unstable limit cycles seem to be at the base of the dynamic behaviour of both understeering and oversteering vehicles driven by humans. At a certain high speed, chaotic motion has been found as well. The delegates of the Colloquium will discuss how to avoid destabilisation of the motion of the car by the driver after a respective disturbance. Future automated vehicles are prone to the same problems of human-driven cars.

General aims:
The general aim of the colloquium is to address a scientific community, that sets the proper theoretical basis for
- understanding the nonlinear behaviour that underpins the motion of car and driver in critical situations, like the response to a disturbance, and
- studying stable or unstable limit cycles, saddles, bifurcations pertaining to vehicle and driver system motion.
Period4 Mar 2022
Event typeWorkshop
LocationMilan, ItalyShow on map
Degree of RecognitionInternational

Fields of Expertise

  • Mobility & Production