This thesis considers applications of gradient-based optimization algorithms to the design and control of some mechanics systems. The material distribution approach to topology optimization is applied to design two different acoustic devices, a reactive muffler and an acoustic horn, and optimization is used to control a ball pitching robot. Reactive mufflers are widely used to attenuate the exh...

A time domain computational approach is applied to predict the acoustic performance of multiple pass silencers with perforated tube sections. This non-linear, one-dimensional method may readily include temporal and spatial variations in sound pressure level, orifice flow velocities, and mean duct flow, all of which affect the local orifice behaviour of perforated tube elements, and therefore th...

The noise levels generated by an unmuffled engine exhaust system can be identified as the loudest vehicle source. muffler or silencer is essential component of internal combustion system. Its main function to reduce exhaust-generated acceptably low level. design development a complex process affecting efficiency and thus fuel consumption, emissions overall generation. This paper focuses on for ...