Abstract
In order to measure the natural vibrations of solid large-scale structure like building that cause resonance,we suggest a new way to excite the natural vibrations through the multi-axis exciting test controlled by the decentralized control.First of all,we prepared the experimental apparatus that has natural vibrations in three dimensions as well as general solid large-scale structure and a small and lightweight shaker with inertial force.Because we can employ shakers anywhere,we can put them inside the structure to oscillate.Next,we installed a number of the shakers in multi-direction inside the structure since solid large-scale structure has the natural vibrations in multi-direction.Moreover,since the actuators can excite the structure at the resonant frequency of the structure,we excited all the natural vibrations in multi-direction without any force command signals by using the decentralized control in which the actuators synchronize with each other to form the natural vibration modes by themselves.
