Forklift Steering Dynamic Characteristics Analysis Based On Adams

In this article a3T forklift is treated as prototype. The kinematics and dynamicssimulation analysis of slider-crank steering mechanism is based on the softwareADAMS. In addition, the papers analyze and verify the steering characteristics bydynamic simulation analysis when the wheel camber angle and kingpin inclinationangle exist.First of all, according to the basic theory of rigid body dynamics, the articleanalyzes kinematics and dynamics of forklift slider-crank steering mechanism. Then,the equations of steering tire kinematics, statics and dynamics is built, which relieson flexible multi-body dynamics theory. Meanwhile, the steering orientation angleof forklift is analyzed. The mathematical model suitable for forklift steering torqueis established. The papers also build a simplified model of steering system byProe3.0and realize the seamless transmission from Proe3.0to ADAMS. After that,the construction of virtual prototype model about forklift is completed throughsetting up tire and road surface files in ADAMS. The article simulates slider-cranksteering mechanism after adding constrains and driving. The mechanism isoptimized, which makes the outside wheel angle mean error minimum as theobjective, the length and initial angle of steering knuckle,the connecting rod lengthand the hydraulic cylinder offset distance as variables. The variation trend betweenthe aligning torque, the aligning resistance moment, driving torque of the hydrauliccylinder piston rod and the change of kingpin inclination angle is studied throughexperimental analysis in ADAMS. The result shows that the torque mathematicalmodel is correct. With minimum average driving torque produced by hydrauliccylinder piston rod as the goal, kingpin inclination angle as the variable, anoptimized design for the model is implemented. The existence of kingpin inclinationangle improves the slider-crank steering performance by means of return abilityexperiment.The article makes the design of forklift steering mechanism by using ADAMSvirtual prototype technology. The kinematics and dynamics of steering mechanism data graphs are got. It provides reference data and method for forklift steeringmechanism design.