The three-dimensional active attenuation of sound
Abstract
This thesis examines the active noise control (ANC) literature and presents three types of models used to represent acoustic plants. These models are used in conjunction with established optimal control techniques or with control techniques from the ANC literature. The first model, the Green's function model, is presented in conjunction with the virtual earth, the absorbing termination, and an optimization controller which were defined in the ANC literature. New theoretical results are obtained for this model. The second model, the modal model, is presented in conjunction with continuous optimal control theory. This model was used to experimentally produce sound reductions in a rectangular box with damped boundaries. The third model, the source point model, is presented in conjunction with discrete optimal control theory. New theoretical results are also obtained for this model. The benefit and shortcomings of each model are discussed.
Degree
Ph.D.
Advisors
Shoureshi, Purdue University.
Subject Area
Mechanical engineering
Off-Campus Purdue Users:
To access this dissertation, please log in to our
proxy server.