Fundamental Study of Active Mass Damper for Improving Livability of Houses Against Traffic Vibration Available to Purchase

In Japan, there are many houses built on limited space and also besides side of causeways and railroads, due to population concentration in the cities in recent years. Houses with 3-stories or slender structure houses are susceptible to traffic vibration induced by external forces. This affect frequency creates an uncomfortable environment for habitation. Because houses often have a complex geometry, it is difficult to establish the vibration characteristics of a structure. Furthermore, the response characteristics of a house will change with environmental condition. To address some of these issues, an Active Mass Damper (AMD) has developed in order to supply for users with a reasonable price. This AMD has a mass of 176kg in weight supported by guide springs, and driven by an AC servomotor and a wire rope. The AMD is controlled by two methods, LQ Control and Direct Displacement Feedback (DDFB) Control. In this report, a control effect is examined through simulation when the AMD is installed in the RF level of a 3-story house model. The simulation results are demonstrated that the AMD could improve the uncomfortable environment in houses. A matter of particular note was reduction of about 4 dB in the overall vibration level. Concerning an experimental study about this equipment, refer to the following report, “Fundamental experiment of Active Mass Damper for houses against traffic vibration”.