Dynamic modeling and vibration analysis of cherry pickers with flexible arms

The tip-over stability of cherry pickers is degraded by the cherry pickers' payload oscillations.As a first step,a static model was given to provide the basic insight of the whole system.After a simple model of cherry picker with flexible arms being carried out,the complete multi-body dynamic model was established based on AUTOLEV.The response curves of the arms' angles and the payload under the excitation of step signal were simulated.From the simulations,it can be seen that the performance of the base and the arms are all able to lead to the significant payload oscillations,which will thereby result in the unsafety of cherry picker.The full analysis of the payload vibration is the basis for repressing the system vibration.