To research the dynamic characteristics of the track-constrained system for the special application scenario of the chain drive system, the system dynamics model including multi-stage load conveying was established, the velocity characteristics of load conveying by the system were analysed, and the system torque of load conveying during the transition stage was revealed to be changing patterns with the angular velocity of the driving components. To improve the establishment efficiency of the system model for diversified conveying requirements, the model was simplified and the differences between before and after the model simplification were compared and analysed. Finally, the dynamics model and computational results were verified by experiments. The results show that increasing the number of sprocket teeth improves the velocity fluctuation when conveying loads during the straight stage. When the load is conveyed during the transition stage, the amplitude of the sudden change in system torque increases with the increase in angular velocity of the driving components. The rotational inertia and torque of the system after model simplification are basically the same as the trends before simplification, and the model calculation results are basically the same as the trends of the experimental measurements. The results of the research provide the theoretical basis the design of chain drive system with track constraints.
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