112 Driving at Resonance Point of Multi-Degree-of-Freedom System by Decentralized Control : Application to Multipoint Shaking Test of Large Structure

Abstract

For the forced excitation of a large structure such as airplanes using one actuator, natural vibration mode cannot be excited because the vibration doesn't spread in the entire structure. On the other hand, when a lot of actuator is used, the excitation frequencies of the actuators must coincide and the magnitude and phase of the excitation force must be minutely adjusted for every vibration mode. Thus, we used a method for driving at resonance point by using the self-excited vibration generated by the local feedback control. A desired mode of vibration can be excited by adding a sine wave signal within the local feedback controller.