This book examines the driving dynamics of harvesting machines with
large harvesting heads. It looks at how to efficiently use these
machines. The author explores a common problem that hinders machine
performance when harvesting with very large headers. He deals with
concepts for reducing the undesired effects of vehicle dynamics when
using these machines.
With the steadily increasing capacity of harvesting machines, the
working widths of the harvesting heads get wider and the headers get
heavier. It has become essential with these giant headers to use header
height sensors and header control systems to avoid the headers from
being run into the ground when encountering elevation changes in the
terrain. A fundamental limitation of the viable speed of header height
adjustments arises from the combination of the wider and heavier headers
with soft agricultural tires.
The current solution to find an appropriate speed of header height
adjustments is to perform a header calibration whenever a new header is
attached to the machine and to endow the machine operator with the
capability to tweak the speed of adjustments manually. The result of an
inappropriate speed of height adjustments is a reduction in overall
productivity and an under-utilization of the harvesting machine. The
author looks at ways to prevent this. He offers detailed modeling of the
vertical dynamics including dynamic wheel loads. In addition, the book
contains results from simulations and machine tests.