Research Of Active Vibration Control Of Beam

The mission of the vibration control is to make the level of vibration be subjected to a certain means through controlling the object to satisfy the request of people.The active vibration control means that during the process of vibration control, applying the certain control strategy and calculating in real time, then passing the results to actuator to restrain or remove the vibration. The research of the control law is a very important aspect of the active vibration control.The beam is a kind of structure which is familiar to us. It is a system with multi degrees of freedom. And it was taken as the studying object in this paper. The vibration of the beam was analyzed, which includes the flections and forced vibration of the beam. At the same time the experiment was carried on to the simply supported beam, the natural frequencies and natural mode shapes were gotten. The method of modal analysis is to simplify the complicated actual structure model to be modal model, to carry on the parameter identification of the system, in order to simplify the mathematics operation of the system. The active vibration control of beam includes repressing the vibration or to make it vibrate according to the request.Two kinds of vibration control methods were adopted in this paper, which are modal control and neural network control. The method of modal control is to convert the vibration control system from infinite Degrees of Freedom system to controlling some modes in the modal space, it means controlling the modes. This method was used in this paper to control the beam, the simulation and experiment was also done. The neural network can approach the complicated nonlinear system well in...