Active Steering Control to Enhance Narrow Tilting Vehicle Stability

James RobertsonCentre for Power Transmission and Motion Control

University of BathBath, United Kingdom

Supervisors: Dr J. Darling, Prof A. Plummer

What Are Narrow Tilting Vehicles?

Narrow vehicles which tilt during cornering to maintain stability

Can provide a safe low carbon alternative to existing personal transportation methods. Particularly suited to urban environments

The C.L.E.V.E.R Vehicle: Tilting system developed by the University of Bath

The C.L.E.V.E.R Vehicle Crash Test: 3* NCAP Equivalent

Direct Tilt Control (DTC)

Steering Direct Tilt Control (SDTC)

Hydraulic Active Steering System Response

Experimental Results

Steering Response Stability Improvement

Wheel Load Variation Reduction ≈ 30% at 7.5m/s

Steer Input Severity Reduced

UKACC PhD Presentation Showcase

Conclusion and future work

Conclusions Active steering improves vehicle roll stability Steer inputs and can be delayed or countersteering action

introduced Moment generated by DTC actuators reduced

Further Work Improvements to the lateral acceleration estimation model Further experiments to establish system performance in a

variety of manoeuvres and operating conditions