Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Richard J. Silcox"'
Publikováno v:
AIAA Journal. 46:2545-2557
Reduction of jet noise continues to be an important research topic. Exhaust-nozzle chevrons have been shown to reduce jet noise, but parametric effects, including immersion amount and azimuthal distribution, are not well understood. Additionally, thr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6ea962d0953e58f276c3523d3867720
https://doi.org/10.2514/1.35939
https://doi.org/10.2514/1.35939
Publikováno v:
SIAM Journal on Control and Optimization. 35:1263-1296
Issues regarding the experimental implementation of PDE-based controllers are discussed in this work. While the motivating application involves the reduction of vibration levels for a circular plate through excitation of surface-mounted piezoceramic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8acad1fb65eea5b719d3490f97c691e3
https://doi.org/10.1137/s0363012995285909
https://doi.org/10.1137/s0363012995285909
Publikováno v:
Journal of Sound and Vibration. 199:777-799
The estimation of material and patch parameters for a system involving a circular plate, to which piezoceramic patches are bonded, is considered. A partial differential equation (PDE) model for the thin circular plate is used with the passive and act
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01e81e30ce9cdf74928a1e13acbea678
https://doi.org/10.1006/jsvi.1996.0649
https://doi.org/10.1006/jsvi.1996.0649
Publikováno v:
51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition.
In this paper, the use of polyimide foam as a lining in double panel applications is considered. It is being investigated here as a replacement for aircraft grade glass fiber and has a number of attractive functional attributes, not the least of whic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7e1a1e3c673ca737e008a6b72ef885a
https://doi.org/10.2514/6.2013-213
https://doi.org/10.2514/6.2013-213
Publikováno v:
Journal of Vibration and Acoustics. 118:649-656
Using a neural network concept, an algorithm has been developed that can be employed to conduct on-line identification of modal parameters of a structure such as natural frequency, damping ratio, and mode shape coefficients at measurement locations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69fd45b807e0277b1571a744e91aa7dc
https://doi.org/10.1115/1.2888347
https://doi.org/10.1115/1.2888347
Publikováno v:
Journal of Vibration and Acoustics. 117:261-270
This work describes a range of issues relating to the implementation of active control for noise and vibration problems. It is important in the commercialization of this technology to consider these and many other factors relating to design of these
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14c3d0a9386b00fa8e6a5b5d240e716d
https://doi.org/10.1115/1.2838672
https://doi.org/10.1115/1.2838672
Publikováno v:
Journal of Vibration and Acoustics. 116:386-396
The modeling and active control of acoustic pressure in a 2-D cavity with a flexible boundary (a beam) is considered. Control is implemented in the model via piezoceramic patches on the beam which are excited in a manner so as to produce pure bending
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b92044c0e04a732a6a388a883b5a48f8
https://doi.org/10.1115/1.2930440
https://doi.org/10.1115/1.2930440
Publikováno v:
Journal of Intelligent Material Systems and Structures. 4:98-116
The active control of acoustic pressure in a 2-D cavity with a flexible boundary (a beam) is considered. Specifically, this control is implemented via piezoceramic patches on the beam which produces pure bending moments. The incorporation of the feed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fac7b0e7e2979bf967bbb0e43fbe1905
https://doi.org/10.1177/1045389x9300400113
https://doi.org/10.1177/1045389x9300400113
Publikováno v:
Journal of Sound and Vibration. 153:387-402
Actively controlled harmonic force inputs were applied experimentally to reduce the sound transmitted through an elastic circular plate. The control implementation used a time domain least mean square adaptive algorithm with two error sensors. The co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32c2090a2cdd25d00746c4e1460defaf
https://doi.org/10.1016/0022-460x(92)90372-5
https://doi.org/10.1016/0022-460x(92)90372-5
Publikováno v:
SPIE Proceedings.
Control of jet noise continues to be an important research topic. Exhaust-nozzle chevrons have been shown to reduce jet noise, but parametric effects are not well understood. Additionally, thrust loss due to chevrons at cruise suggests significant be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0bd48a1ac80d2be391f2603deb7db95
https://doi.org/10.1117/12.776309
https://doi.org/10.1117/12.776309