Abstract
In this paper, we describe the coupled vibration of oscillators mounted on a plate hanging on four strings and investigate the features of such vibration. From the experimental and numerical simulation results, the following finding were obtained. In-phase synchronization of pendulums has two types of phase-difference between pendulums and the suspended platform. The Amplitude of vibration are influenced by the natural frequency of the suspended platform, mass between of pendulums and damping ratio.