|Institution:||University of Cincinnati|
|Department:||Engineering and Applied Science: Mechanical Engineering|
|Keywords:||Mechanics; Active Vibration Control; Modal Control; Discrete Modal Filters; Arduino; Feedback Control Experiment; Collocated Control|
|Full text PDF:||http://rave.ohiolink.edu/etdc/view?acc_num=ucin1416579211|
Vibration suppression has application in many industries including aerospace for vibration suppression of flexible bodies, automobile for ride comfort though suspensions, and machining devices for precision tooling. Modal control is implemented in modal space instead of local space. As a result the different modes of a system are controlled independently using parallel controllers. The controllers using modal control being low order and simple controllers are easy to implement. The hardware implementation of the closed loop control is expensive which makes it difficult to study the control theories experimentally for academic purposes. In this thesis, the discrete modal filters are reviewed. An analytical method of modal coordinate extraction from physical response data is studied. This method is validated experimentally on an aluminum beam. A mathematical model for a velocity feedback control of a single mode for a multiple input multiple output system is developed and simulated on MATLAB platform. A low cost closed loop hardware based on Arduino microcontroller is developed for experimental implementation of the control theory. An external ADC and DAC are coupled with the Arduino. The controller is programmed based on the functions developed in C++ language.