MODELLING OF AN OVERHEAD CRANE WITH VERTICAL VIBRATION FACTOR

Abstract

The overhead crane system is a type of crane commonly found in heavy
industrial environment such as assembly system, construction, machinery
manufacturing, transportation, ship-building,... etc. The overhead crane is an
under-actuated system, it is often modeled with about 3 to 5 degrees of
freedom, taking into account horizontal vibration factor or noise that affected in
an objectively way to system like wind or rain. However, in practice, besides
horizontal vibration factor, it is still existed a veritcal vibration factor which is
caused by load and elastic level of wire. This component has a smaller amplitude
than the 2 horizontal osillations so it is rarely mentioned. Even though, the
appearance of this factor still affected directly to the quality of system, efficiency
of system and the level of energy consumption. In this study, the overhead crane
system with 6 degrees of freedom is proposed with the consideration of vertical
vibration factor, and investigating the dynamic model obtained through
numerical simulation.