Mechanisms of active control in cylindrical fuselage structures
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Silcox, Richard J.↗
Engineering topics
Fuller, Chris R.
Publications and source records attributed to Fuller, Chris R..
Experiments on active control of vibrational power flow using piezoceramic actuators and sensors
The active control of flexural power flow in both semiinfinite and finite elastic beams is experimentally investigated. The experimental results demonstrate that piezoceramic transducers when used in conjunction with an adaptive least mean squares controller, can effectively control flexural power flow in thin beam systems. The piezoceramic transducers offer distinct size and weight advantages over conventional transducers. The experiments also demonstrate the use of an axial scanning laser vibrometer to determine out of plane velocity and power flow.
Gibbs, Gary P.↗
Application of pattern recognition techniques to the identification of aerospace acoustic sources
A pattern recognition system was developed that successfully recognizes simulated spectra of five different types of transportation noise sources. The system generates hyperplanes during a training stage to separate the classes and correctly classify unknown patterns in classification mode. A feature selector in the system reduces a large number of features to a smaller optimal set, maximizing performance and minimizing computation.
Fuller, Chris R.↗
Mechanisms of active control for noise inside a vibrating cylinder
The active control of propeller-induced noise fields inside a flexible cylinder is studied with attention given to the noise reduction mechanisms inherent in the present coupled acoustic shell model. The active noise control model consists of an infinitely long aluminum cylinder with a radius of 0.4 m and a thickness of 0.001 m. Pressure maps are shown when the two external sources are driven in-phase at a frequency corresponding to Omega = 0.22.
Lester, Harold C.↗