Motorcycles are physically instable systems. As such, they present chassis engineers
with a signifficant challenge, further accentouated by the ever increasing horsepower
to weight ratios and motorsport advances. One of these challenges, is the simulation
In this area concentrates the research objective of this project. Main
the Driver Model
the Motorbike Model
the Tyre Models
The Driver Model is an attempt to replicate the human behaviour in sportsbike riding, taking into account
the way an experienced rider acts (using the whole track width targeting for the apex,
moving his upper body to reduce roll and pitch movement, etc) intstead of a controller
and a predefined trajectory.
The Bike-Models are detailed to allow testing various
design approaches in motorcycle's chassis engineering. Thus, a signifficant part of the
research, consists of simulating alternative front suspensions.
The Tyres are also a very
signifficant factor, we consider though, that the state of the art in tyre simulations is
quite satisfactory. Consequently, established tyre models can be used without reservations.
The long term goal of this research project, apart from thorough understanding of motorcycle dynamic qualities,
is the development of a trully radical motorcycle concept, boasting active chassis and aerodynamics.
Indeed, if the lateral acceleration limits set by tyre technology are to be further
pushed, it can only be achieved by application of aerodynamic downforce. Total chassis
control, such as active steering and eigenmode absorbtion is the other aspect of this
view Tesis-V4 running(15MB)
Following are 4 videos animating the transient response simulations of a bike equipped with a CMG stabilizer
and the respective standard bike on two critical situations: a) strong crosswind while moving in a straight
line at 200 kph and b) mid-bend bumper while tackling a left-hand corner at lateral acceleration close to 1g.
In both cases the gyros absorb the impact of the respective delta and sinusoidal function type disturbances
and the driver is left to re-position the bike on the desired trajectory.
View more simulations