Abstract
Push carts are used as a simple means of carrying products. One problem with the use of push carts is that the impact generated when the wheels of the cart passes over uneven surfaces during carrying products is transmitted to the product. In previous studies, the push cart was equipped with a low shock and low vibration caster applying the center of percussion and active vibration control, thereby reducing the transmission of the shock. On the other hand, damping of residual vibration remained an issue. This residual vibration is controlled by Direct Inertia Force Control (DIFC) proposed by the authors. DIFC uses inertia force generated by an inertia force generator (IFG) to control vibration. We evaluated the degree to which DVFB control by DIFC can dampen the residual vibration that occurs when a push cart passes over uneven surfaces during carrying products. The Running machine for a push cart using a conveyor belt reproduces the same situation as when a push cart is used for carrying products at a fixed position. A pipe of 3 mm in diameter was attached to the conveyor belt to serve as an uneven surface. Residual vibration is generated when the conveyor passes over this pipe. This residual vibration is damped by DVFB control using DIFC. The measurement results showed that the amplitude decreased quickly.
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