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Analysis and Optimisation of a New Differential Steering Concept

Márton Kuslits

ISBN 978-3-8325-5578-8
147 pages, year of publication: 2022
price: 38.00 €
https://doi.org/10.30819/5578
PDF – OpenAccess

The emergence of electric drives opens up new opportunities in vehicle design. For example, powerful in-wheel motors provide unprecedented flexibility in chassis design and are suitable for distributed drive solutions, although implying non-trivial vehicle dynamics control problems.

This work aims at a new differential steering concept relying only on passive steering linkages where the necessary steering moment about the kingpins is generated by traction force differences produced by in-wheel motors. For the analysis of the proposed steering concept, a tailored multi-body system model is introduced along with the associated steering control system.

In addition, this work explores the general applicability of such a new steering concept by using multi-objective optimisation. For this purpose, various design objectives and constraints are defined with respect to the dynamic, steady-state and low-speed steering performance of the vehicle.

The resulting behaviour of the proposed steering concept is investigated by various simulation experiments demonstrating a comparable steering performance to that of conventional passenger cars.

Keywords:
  • differential steering
  • multi-body system
  • steering control
  • steer-by-wire
  • multi-objective optimisation

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