Abstract
This chapter is dedicated to the vertical dynamics modelling and the model analysis of a self-propelled harvesting machine. It contains the modelling assumptions, and presents the vertical dynamics model of the harvesting machine in great detail. The model includes the harvesting machine, the harvesting head, the hydraulic raise/lower circuit of the front-end equipment and the dynamic wheel loads resulting from accelerating and decellerating of the vehicle. Additionally, the linearisation of the model is described. In the model analysis, it is shown how the natural frequencies and according damping ratios of the harvesting machine are derived, and a sensitivity analysis is performed. The chapter ends with a discussion of potential solution approaches to the header height control problem under investigation
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