Active vibration control tests of arch structures using piezoelectric films

The present paper discusses the active vibration control of arch structures on the Optimal Control Theory by vibration tests. The controlled objects are arch structures. We try to control the scale model's responses of arch structures with piezoelectric films. Here, a DSP (Digital Signal Processing) is used for the controller. The responses are measured with laser displacement sensors. The control force is added to the arch structure by piezoelectric films installed in the arch structure. The main purpose of this paper is to grasp the fundamental characteristic ofthe active vibration control ofspatial structures. Specifically, the influences of delay time and phase of control input on the control results are analyzed. First, a control system is designed in consideration for the effects of delay time and noise. Then, active vibration control tests are carried out using the scale models of arch structures. Finally, we weigh the results of numerical analyses with those of active vibration control tests.