40th Structures, Structural Dynamics, and Materials Conference and Exhibit 1999
DOI: 10.2514/6.1999-1318
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Contributions to active buffeting alleviation programs by the NASA Langley Research Center

Abstract: Buffeting is an aeroelastic phenomenon which plagues high performance aircraft, especially those with twin vertical tails like the F/A-18, at high angles of attack. This buffeting is a concern from fatigue and inspection points of view. By means of wind-tunnel and flight tests, this phenomenon is well studied to the point that buffet loads can be estimated and fatigue life can be increased by structural enhancements to the airframe.

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Cited by 25 publications
(23 citation statements)
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“…The blended concept used an active rudder to control buffeting in the rst bending mode, and piezoelectric actuator devices were used to control buffeting in the rst torsion mode. Based on the ndings of these test, 33 full-scale ground tests are now underway, and follow-on ight tests are being planned to further develop the BLA concept.…”
Section: Buffet Load Alleviation (Bla) Programmentioning
confidence: 99%
“…The blended concept used an active rudder to control buffeting in the rst bending mode, and piezoelectric actuator devices were used to control buffeting in the rst torsion mode. Based on the ndings of these test, 33 full-scale ground tests are now underway, and follow-on ight tests are being planned to further develop the BLA concept.…”
Section: Buffet Load Alleviation (Bla) Programmentioning
confidence: 99%
“…The closed-loop tests demonstrated critical damping increase from 0.44% to 3.70% as the feedback (Moses, 1997b). (Moses, 1999). gain was varied from 0 to 20 [Figure 29(b)]. A comprehensive analysis of the design and fabrication issues associated with transferring these proof-of-concept results to operational aerospace structures was presented by Durr et al (1999).…”
Section: Active Suppression Of Tail Buffetingmentioning
confidence: 99%
“…Larson et al (1998) describe the use of piezoceramic wafer actuators for active vibrations suppression of an acoustically excited B-1B aircraft skin panel. (Moses, 1999), (b) power spectral density of acceleration measured on the vertical tail tip near the trailing edge on F/A-18 aircraft during initial ground tests (McGowan et al, 1998) (Moses, 1999). (Manser et al, 1999). mented with PZT wafer actuators, 14 for symmetric actuation, and 8 for anti-symmetric actuation.…”
Section: Active Suppression Of Skin Panel Vibrationmentioning
confidence: 99%
“…Um outro grande programa envolve pesquisas para controle ativo de buffeting utilizando materiais piezelétricos nas empenagens verticais da aeronave F/A-18 (MOSES, 1997(MOSES, , 1999DÜRR, 1998;HOPKINS et al, 1998). Estes estudos apresentam testes em túnel de vento com um modelo de aeronave em escala dinâmica (MOSES, 1997), até ensaios em solo com uma aeronave real (MCGOWAN et al, 1998;HOPKINS et al 1998;MOSES, 1999).…”
Section: Controle Ativo Utilizando Materiais Piezelétricosunclassified
“…Por exemplo, o controle ativo de flutter utilizando atuadores piezelétricos apresentado por Heeg (1993), o programa da NASA "Piezoelectric Aeroelastic Response Tailoring Investigation (PARTI)" desenvolvido para controle de flutter e atenuação da resposta a rajada (MCGOWAN et al, 1998) e os trabalhos apresentados para controle ativo de buffeting utilizando materiais piezelétricos nas empenagens verticais da aeronave F/A-18 (MOSES, 1997(MOSES, , 1999DÜRR, 1998;HOPKINS et al, 1998). Uma revisão bastante abrangente sobre o uso de materiais inteligentes em soluções de problemas aeroelásticos é apresentada por Giurgiutiu (2000).…”
Section: Introdução Introduçãounclassified