DEVELOPMENT OF OIL-DAMPER TO STABILIZE OSCILLATION OF MONITORING CAMERA ON THE TOP OF CRANE BOOM

A monitoring camera, which is set on the top of a mobil crane boom br the purposeofkeeping the operation safe and easy, plays an important role as an another eye br a crane operator. Recentlya total length of a mobil crane has been increased much more and a crane boom has been lightened. As the result, the stiffness of the crane boom becomes low. These low stiffness and lengthening cause the amplification of a small oscillation which is negligible for a conventional one. The new device for damping the oscillation is needed.In the present study we developed a new oil-damper to stabilize the oscillation and investigated its characteristics in the simulation as well as in the experiment. Simulation is based on Bond graphs method. Simulation results agree well with the experiment.