電磁式ダンパを用いた衝撃による伝達力の低減

抄録

This paper describes a method to reduce the transmitted force to electronic equipment mounted in the cabin of a construction machinery using a voice coil motor and capacitors. A construction machinery is usually operated on uneven surfaces, and the unevenness of the road surface causes impact vibrations in the cabin. This free vibration of the cabin induces transmission forces to the equipment mounted in the cabin. Because the transmitted force can cause electronic equipments to fail, the transmitted force should be reduced to protect it. Therefore, we propose a method to reduce the transmitted force using an electromagnetic damper consisting of a voice coil motor and a capacitor. Before the impact is applied to the cabin, electric charge is stored in the capacitor. When the cabin is impacted, an electromagnetic force is generated by passing an electric current from the capacitor to the voice coil motor. Because the waveform of the transmitted force is determined by the natural frequency and damping ratio of the cabin, the optimum capacitance and resistance were derived considering the natural frequency and damping ratio of the cabin, respectively. The effectiveness of the proposed method was verified through simulations and experiments.