Active control of payload fairing noise

Abstract This work presents adaptive feedforward control using advanced structural–acoustic actuators to reduce the low-frequency acoustic transmission in a sub-scale composite fairing. The actuators, referred to as distributed active vibration absorbers, are multi-resonance devices specifically designed to produce high output forces over a large bandwidth as necessary for payload fairing noise control. Single- and multi-channel control configurations were implemented using external acoustic disturbance levels as high as 130 dB. Design parameters such as sample frequency, control filter length, reference source, and causality/delay were examined to determine impact on performance. The active control system reduced the broadband interior noise levels by up to 5 dB between 70 Hz and 200 Hz, and 10 dB at specific resonances.

[1]  James H. Starnes,et al.  Design and manufacturing of aerospace composite structures, state-of-the-art assessment , 2002 .

[2]  R. Clark,et al.  Noise reduction in a launch vehicle fairing using actively tuned loudspeakers. , 2003, The Journal of the Acoustical Society of America.

[3]  Chris R. Fuller,et al.  Interior noise reduction of composite cylinders using distributed vibration absorbers , 2001 .

[4]  M. J. Robinson.  Composite structures on the DC-XA Reusable Launch Vehicle , 1997 .

[5]  Frank Fahy,et al.  A MODAL EXPANSION ANALYSIS OF NOISE TRANSMISSION THROUGH CIRCULAR CYLINDRICAL SHELL STRUCTURES WITH BLOCKING MASSES , 2001 .

[6]  Franck Sgard,et al.  Acoustic absorption of macro-perforated porous materials , 2001 .

[7]  Robert D. Corsaro.  Lightweight low-frequency woofer for active sound control in payload fairings , 2001, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[8]  Simon J. Estève,et al.  Reduction of sound transmission into a circular cylindrical shell using distributed vibration absorbers and Helmholtz resonators. , 2002, The Journal of the Acoustical Society of America.

[9]  F. Fahy.  Sound and structural vibration , 1985 .

[10]  Christopher Niezrecki,et al.  Feasibility to Control Launch Vehicle Internal Acoustics Using Piezoelectric Actuators , 2001 .

[11]  William R. Saunders,et al.  Adaptive Structures: Dynamics and Control , 1998 .

[12]  Steven F. Griffin,et al.  Development of an Adaptive Passive Vibro-Acoustic Device for Payload Fairings , 2003 .

[13]  Steven A. Lane,et al.  Overview of the Vibro-Acoustic Launch Protection Experiment at the Air Force Research Laboratory , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[14]  Chris R. Fuller,et al.  Control of Aircraft Interior Broadband Noise with Foam-Pvdf Smart Skin , 1999 .

[15]  Dennis R. Morgan,et al.  A control theory approach to the stability and transient analysis of the filtered-x LMS adaptive notch filter , 1992, IEEE Trans. Signal Process..

[16]  Robert L. Clark,et al.  Active Acoustic Control of a Rocket Fairing Using Spatially Weighted Transducer Arrays , 2001 .

[17]  D. Leo,et al.  Active Structural Acoustic Control of a Launch Vehicle Fairing Using Monolithic Piezoceramic Actuators , 2001 .

[18]  A.-M. Pandelli,et al.  L'évolution des matériaux composites dans le domaine des lanceurs spatiaux , 1997 .

[19]  Eric H. Anderson,et al.  Active structural-acoustic control for composite payload fairings , 1999, Smart Structures.

[20]  Scott D. Snyder,et al.  The effect of transfer function estimation errors on the filtered-x LMS algorithm , 1994, IEEE Trans. Signal Process..

[21]  Colin H. Hansen,et al.  Active Structural-Acoustic Control of a Rocket Fairing Using Proof-Mass Actuators , 2001 .

[22]  Chris R. Fuller,et al.  Active control of transmission of turbulent boundary layer noise using smart foam elements , 1998 .