Active Structural Acoustic Control of a Machine Enclosure

Authors:	Veres Sandor M, University of Southampton, United Kingdom Luo Jian, University of Southampton, United Kingdom
Topic:	1.2 Adaptive and Learning Systems
Session:	Learning and Adaptive Control of Mechanical Structures
Keywords:	Active vibration control, modal analysis, system identification, adaptive control

Abstract

Vibrating machinery such as pumps, generators and compressorsnormally use passive insulation materials to reduce soundradiation. This paper provides a practical examination of possiblesolutions to active control of machine enclosures that reduces theradiated sound intensity from the enclosure to the environment.The results show that a combination of simple sky-hook typefeedback controllers for active mounts, and relativelystraightforward feedforward frequency selective filter (FSF) basedcontrollers for modal control, offer a practical solution. Thealgorithmic background to the new control techniques areexplained.