Nonlinear dynamics and control of a four-wheel steering vehicle using symbolic-numerical approach
by N.E. Sanchez
International Journal of Vehicle Design (IJVD), Vol. 15, No. 1/2, 1994

Abstract: A symbolic-numerical approach is used to analyse the response of a road vehicle equipped with a four-wheel steering system using a nonlinear model with a low number of DOF. A quadratic law to control the rear wheels is derived in closed-form, which shows better characteristics under steering and braking manoeuvres than its linear equivalent. The stability of the straight line motion for four-wheel steering and front-wheel steering vehicles is analysed using symbolic manipulation to characterize the stability in terms of eigenvalues computed in closed-form. This approach can provide formulas to assess dynamic stability and significantly enhance the vehicle design process.

Online publication date: Wed, 28-May-2014

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