𝔖 Bobbio Scriptorium
✦   LIBER   ✦

COLLOCATED STRUCTURAL CONTROL FOR REDUCTION OF AIRCRAFT CABIN NOISE

✍ Scribed by Douglas G. MacMartin

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
499 KB
Volume
190
Category
Article
ISSN
0022-460X

No coin nor oath required. For personal study only.

✦ Synopsis

Various approaches to cabin noise reduction within turbo-prop aircraft have been suggested. Since the primary source of internal noise is due to propeller-induced fuselage vibration, the noise can be reduced by minimizing the noise transmission through the fuselage using active structural control. The feasibility of a structural control approach using piezoelectric actuators and structural sensors is investigated. Feedback of collocated strain yields an approach which is simple, modular, and extremely robust. Actuator and sensor selection is based on wave-number arguments. Simulations with a simple vibro-acoustic aircraft model indicate that the desired goal of a 10 dBA reduction in peak internal noise is achievable with relatively few actuators. Various actuator/sensor placement and control architecture configurations are investigated with the eventual goal of minimizing the total weight penalty.

πŸ“œ SIMILAR VOLUMES

EXPERIMENTAL STUDY OF SMART SEGMENTED TR
EXPERIMENTAL STUDY OF SMART SEGMENTED TRIM PANELS FOR AIRCRAFT INTERIOR NOISE CONTROL
✍ S.M. HIRSCH; N.E. MEYER; M.A. WESTERVELT; P. KING; F.J. LI; M.V. PETROVA; J.Q. S πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 468 KB

A smart trim panel used as a secondary source for active noise control in aircraft is developed and tested. The smart trim panel is a rectangular segment of aircraft trim panel which is suspended by a #exible support. This support converts the sti! trim panel into #exibly mounted pistons which can b

LQG/GA DESIGN OF ACTIVE NOISE CONTROLLER
LQG/GA DESIGN OF ACTIVE NOISE CONTROLLERS FOR A COLLOCATED ACOUSTIC DUCT SYSTEM
✍ JONG-YIH LIN; HORNG-YIH SHEU; SHIH-CHENG CHAO πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 248 KB

Active noise control of an acoustic duct system is studied by a real state-space model in this paper. The linear quadratic Gaussian (LQG) method is chosen to design an active noise controller in order to reject noise in a collocated duct system subject to a disturbance source at one end. Robustness

ACTIVE INTENSITY CONTROL FOR THE REDUCTI
ACTIVE INTENSITY CONTROL FOR THE REDUCTION OF RADIATED DUCT NOISE
✍ S.-W. Kang; Y.-H. Kim πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 398 KB

Mean intensity based active control for the cancellation of radiated noise out of the duct exit is studied. The active intensity control strategy is derived based on the relation of the exterior sound field radiated out of the duct termination and the interior sound field of the duct. One of the cha