Dynamics of 3 Points Linkage Hitching (VI)

Vertical Motion of a Tractor and a Hitched Plow

Abstract

Dynamics of the system with a tractor and a hitched plow are discussed with respect to their vertical motion.
Frequency response of a 35 PS tractor with a single plow is around 0.1-0.3c/s and the characteristics are approximated to a first order response under normal operating condition.
In ordinary uncontrolled 3 points link hitch, existence of the control spring which locates at the end of the top link is not necessarily useful to maintain the stability. And viscous resistance to the motion of lift arm is also not necessarily effective for the stability.