Matching and optimising analysis of multi-axle steering vehicle steering system

Abstract

The analysis of the multi-axle steering link mechanism (MASLM) link forces provides the foundation for the mechanism's design. The matching level between the steering cylinder driving torque and the tyre pivot steering resistance torque can dramatically influence the link forces. In this study, the accuracy of the tyre resistance torque formula reached 90.7%. A steady kinematic-mechanical coupling model of the MASLM was built modularly, and a method of calculating the link forces and steering hydraulic pressure is proposed. To verify the coupling models, an all-terrain QAY130 crane was chosen for simulation and testing. Two vehicle models were built by using the Adams and Matlab software, respectively. The discrepancies were less than 23.5% between the test values and the predicted values for the previous two models, but exhibited similar variation trends. The installation site and diameter parameters of the steering cylinders were optimised to minimise the link forces.