Development for generalised multi-axle steering vehicle handling

This paper devotes main effort to develop the generalised multi-axle steering vehicle handling for more comprehensive analysis with the factors of vehicle body roll, multi-axle, unsprung mass, steering centre distance, steering ratio coefficient and steering delay. A linear vehicle dynamic model is established firstly. Then the multi-axle steering vehicle handling is analysed from two aspects of steady-state and transient-state. For the steady-state, the expressions of equivalent wheelbase and steady factor are derived from the generalised vehicle dynamic equations and some special conditions are discussed inextenso. For the transient-state, the expressions of frequency characteristics and root locus are deduced from the generalised vehicle dynamic equations and the influences of steering delay and steering ratio coefficient to multi-axle steering vehicle handling are analysed deeply. The corresponding results derived from the generalised dynamic model can be used for analysing the various influences to multi-axle steering vehicle handling.