Experimental study of different materials on electromagnetic damping characteristics

Electromagnetic damper (EMD) is an aiternative approach in a suspension system. It has been investigated through simuiation and experimental means. Since the effect of a damper is ciosely related to the vibration system, the dynamic characteristics of the system can be acquired by anaiysing the vibration response of the EMD. This paper presents an investigation of the EMD effect through a simulation and experimental study. The EM D system was simulated in MATLA B by considering the system as a mass-spring-damper system. A vibration test rig with a simple EMD was fabricated and tested to investigate the effect of electromagnetic force. Results showed that the vibration system test rig can operate as a free vibration system or a forced vibration system. It was also confirmed that aluminium has a better damping coefficient value (2.8 kgs"') as compared to nylon (1.9 kgs"') as an outer cylinder of the EMD system. The damping coefticient is directly related to the material used in the damper, such that the amplitude and settling time of the vibration system can be reduced accordingly.