Smart aircraft panels: the effects of internal pressure loading on panel dynamics

James K. Henry; Robert L. Clark

doi:10.1117/12.350772

9 June 1999 Smart aircraft panels: the effects of internal pressure loading on panel dynamics

James K. Henry, Robert L. Clark

Proceedings Volume 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems; (1999) https://doi.org/10.1117/12.350772
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

Research is currently underway on the development of smart aircraft panels for the reduction of interior cabin noise. This research seeks to adapt previous Active Structural Acoustic Control (ASAC) research on flat plates with attached piezoelectric actuators to the curved panels that compose the exterior skin of an aircraft. In order to predict accurately the closed loop performance of ASAC systems for interior cabin noise reduction, efforts are being made to consider complicating factors in the dynamics of aircraft panels. As part of this research, a state-space model of a curved piezostructure was developed and used to investigate the effects of curvature on panel dynamics. Panel curvature was shown to increase control system bandwidth and to affect transducer coupling. In the present work, the effects of internal pressure loading on the dynamics of a curved piezostructure are investigated through the extension of the previously developed state-space model. The internal pressure model is verified based upon previous work. Pressure loading is shown to increase panel stiffness, thus increasing the natural frequencies of the panel. Further, pressure loading is shown to affect certain modes more than others, resulting in modal reordering. The increased natural frequencies and the model reordering significantly affect control system bandwidth and raise further issues in control design.

Citation Download Citation

James K. Henry and Robert L. Clark "Smart aircraft panels: the effects of internal pressure loading on panel dynamics", Proc. SPIE 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems, (9 June 1999); https://doi.org/10.1117/12.350772

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available