Comparison of two structural sensing approaches for active structural acoustic control

Advanced Time Domain Sensing for Active Structural Acoustic Control

Design of Active Structural Acoustic Control Systems Using Eigenassignment Approaches

(ABSTRACT) Active structural acoustic control (ASAC) in conjunction with the adaptive feedforward control has been proved to be an efficient practical approach to reduce structure-borne sound. ASAC works on the principles of reducing the vibration amplitude of the structure (modal reduction), as well as changing the vibration distributions of the structure so that the vibration distributions of...

Active Structural Acoustic Control of Machine Enclosures

Vibrating machinery such as pumps, generators and compressors normally use passive insulation materials to reduce sound radiation. This paper provides a practical examination of possible solutions to active control of machine enclosures that reduces the radiated sound intensity from the enclosure to the environment. The results show that a combination of simple sky-hook type feedback controller...

Active structural acoustic control of impact noise

Industrial machines like punching machines and presses can generate structure-borne impact noise, with noise levels exceeding the tresholds, imposed by legal regulations on noise emission. This paper presents an approach of non-collocated active structural acoustic control of transient noise, produced by a repetitive impact excitation. Although there is a significant difference in nature betwee...

Virtual sensors for active noise control in acoustic-structural coupled enclosures using structural sensing: robust virtual sensor design.

The work was aimed to develop a robust virtual sensing design methodology for sensing and active control applications of vibro-acoustic systems. The proposed virtual sensor was designed to estimate a broadband acoustic interior sound pressure using structural sensors, with robustness against certain dynamic uncertainties occurring in an acoustic-structural coupled enclosure. A convex combinatio...