title: Virtual sensors for active noise control in acoustic-structural coupled enclosures using structural sensing: robust virtual sensor design.
abstract: 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 combination of Kalman sub-filters was used during the design, accommodating different sets of perturbed dynamic model of the vibro-acoustic enclosure. A minimax optimization problem was set up to determine an optimal convex combination of Kalman sub-filters, ensuring an optimal worst-case virtual sensing performance. The virtual sensing and active noise control performance was numerically investigated on a rectangular panel-cavity system. It was demonstrated that the proposed virtual sensor could accurately estimate the interior sound pressure, particularly the one dominated by cavity-controlled modes, by using a structural sensor. With such a virtual sensing technique, effective active noise control performance was also obtained even for the worst-case dynamics.
authors.affiliation: Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
authors.forename: Dunant
authors.initials: D
authors.lastname: Halim
authors.forename: Li
authors.initials: L
authors.lastname: Cheng
authors.forename: Zhongqing
authors.initials: Z
authors.lastname: Su
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D003198:Computer Simulation; D004867:Equipment Design; D005160:Facility Design and Construction / Q000295:instrumentation*; D008962:Models, Theoretical; D009038:Motion; D009622:Noise / Q000517:prevention & control*; D009716:Numerical Analysis, Computer-Assisted; D011312:Pressure; D015203:Reproducibility of Results; D013997:Time Factors; D014160:Transducers, Pressure; D014584:User-Computer Interface; D014732:Vibration