“Development of an Intelligent Chassis Control system for Improved by sdfwerte

VIEWS: 3 PAGES: 9

									     “Development of an Intelligent Chassis
      Control system for Improved Vehicle
       Handling and Ride performance”
                               by

                    Chandrasekaran RENGARAJ



                            Supervisor
                         Dr.Adam ADGAR

                         Co-supervisors
    Prof Alan WHEATLEY                             Prof Chris COX

                Technical Advisor-Vehicle Dynamics
                       Prof David.A.CROLLA
7th July 2005                                 School of Computing and technology
                                                   University of Sunderland
                Why this research?
     Passive vehicle dynamics systems –steering,
     suspension, brakes, transmission etc…

     Active vehicle dynamics systems – ABS, TCS,
     ARC, ESP,DYC, AFS etc…

     Active chassis systems are stand-alone in nature
     – limitations – not effective at limit handling
     manoeuvres

     Integration of active vehicle dynamics systems –
     improves vehicle dynamics
7th July 2005                         School of Computing and technology
                                           University of Sunderland
  Past Research and References
     Integrated Active steering and Variable Torque Distribution
     improves vehicle handling and stability (Junje He)

     M.Selby proved that co-ordination between the Dynamic
     Yaw control and Active Front Steering improves safety and
     efficiency of action.

     By Integrating active brake, steering and suspension the
     vehicle dynamics can be improved. (Trachtler, Hac et al)

     Reith demonstrated the reduction in stopping distance
     through chassis networking.

     Youssef enhanced the vehicle stability through various state
     estimation techniques and integrated chassis control
     approach
7th July 2005                                School of Computing and technology
                                                  University of Sunderland
                 Unresolved Issues
     But the integrated controller development is still largely in the
     research phase and more than 40 stand alone active systems are
     existing in today’s modern car

     Recent research work in the vehicle dynamics field, according to
     Prof D A Crolla (2005) is characterised by simple vehicle models,
     often coupled with sophisticated control theory but with ill-
     specified performance objectives.

     For example in BMW 5 Series vehicles, the Active Roll Control
     system unloads the wheel from which the Vehicle Stability Control
     is demanding braking force. In case of ABS braking, the
     Continuous Damping Control removes the load from the front
     wheels and deteriorates the braking

     avoidance of potential conflicts - co-existent operation –
     Integration.


7th July 2005                                      School of Computing and technology
                                                        University of Sunderland
                Aims of the investigation:
     Identify the control authority of different
     active chassis subsystems.

     Analyse the behaviour and interaction of
     co-existing subsystems and evaluate
     potential conflicts among them.

     Successfully integrate those systems to
     improve vehicle dynamics
7th July 2005                      School of Computing and technology
                                        University of Sunderland
                Methodology
     Mathematical modelling and simulation of
     passive vehicle dynamics.

     Modelling active chassis subsystems and
     identifying the control authority of each
     subsystem in a variety of dynamic
     manoeuvres.

     Development of new control
     strategies/state estimation
     techniques/actuator designs to integrate
     the various subsystems.
7th July 2005                     School of Computing and technology
                                       University of Sunderland
  Original contribution to knowledge
     A clear delineation of the control authority
     of various actively-controlled chassis
     systems, analysed under a variety of
     dynamics situations.

     The establishment of the co-existence
     protocols between various chassis sub
     systems.

     Development of new control strategies for
     the successful integration of these
     systems.
7th July 2005                      School of Computing and technology
                                        University of Sunderland
Resources and funding required
       for this research
     Software and hardware support: Matlab/
     Simulink, MSC.ADAMS 2005, dSPACE, access to
     high performance computing facilities at SCAT

     This research is funded by the University through
     post-graduate academic assistants programme.

     Any hardware-in-loop simulations (if included)
     will be funded by the SCAT.

     26 research hours/week

7th July 2005                         School of Computing and technology
                                           University of Sunderland
Time scale of work
                   Task                                Before
Modelling of Passive vehicle dynamics            December 2005


Modelling of Active vehicle dynamics                   July 2006

Identification of Control authority of various         Feb 2007
chassis subsystems

Integration of Sub systems                       December 2007

Development of Integrated Vehicle                     June 2008
dynamics Controller

Thesis writing and submission                      January 2009


7th July 2005                                School of Computing and technology
                                                  University of Sunderland

								
To top