Active Control of Sound Transmission Into Three-Dimensional Enclosures

Active Control of Sound Transmission Into Three-Dimensional Enclosures

Abstract :-
The aim of this dissertation work is to understand active control of sound fields inside a three-dimensional rectangular enclosure into which noise is transmitted through a flexible boundary. To this end, analytical and numerical studies have been conducted. In the modeling efforts, a spherical wave excitation, which is generated by a noise source located in the near field of the flexible panel, is considered. Piezoelectric patches, which are bonded symmetrically to the top and bottom surfaces of the panel, are used as actuators. Microphones located inside and outside the enclosure serve as pressure sensors. Continue reading Active Control of Sound Transmission Into Three-Dimensional Enclosures

Access Scheduling and Controller Design in Networked Control Systems

Access Scheduling and Controller Design in Networked Control Systems

Abstract :-
A Networked Control System (NCS) is a control system in which the sensors and actuators are connected to a feedback controller via a shared communication medium. In an NCS, the shared medium can only provide a limited number of simultaneous connections for the sensors and actuators to communicate with the controller. As a consequence, the design of an NCS involves not only the specification of a feedback controller but also that of a communication policy that schedules access to the shared communication medium. Continue reading Access Scheduling and Controller Design in Networked Control Systems