Probability density function of underwater bomb trajectory deviation due to stochastic ocean surface slope / Chu, Peter C. in Transactions of the ASME . Journal of dynamic systems, measurement, and control, Vol. 133 N° 3 (Mai 2011)  

Public ISBD [article]  inTransactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 133 N° 3 (Mai 2011) . - 13 p. Titre : Probability density function of underwater bomb trajectory deviation due to stochastic ocean surface slope Type de document : texte imprimé Auteurs : Chu, Peter C., Auteur ; Fan, Chenwu, Auteur Année de publication : 2011 Article en page(s) : 13 p. Note générale : Systèmes dynamiques Langues : Anglais (eng) Mots-clés : 3D underwater bomb trajectory model Probability density function Bomb deviation Stochastic ocean surface slope 6DOF STRIKE35 Index. décimale : 629.8 Résumé : Ocean wave propagation causes random change in an ocean surface slope and in turn affects the underwater bomb trajectory deviation (r) through a water column. This trajectory deviation is crucial for the clearance of obstacles such as sea mines or a maritime improvised explosive device in coastal oceans using bombs. A nonlinear six degrees of freedom (6DOF) model has been recently developed and verified at the Naval Postgraduate School with various surface impact speeds and surface slopes as model inputs. The surface slope (s) randomly changes between 0 and pi/2 with a probability density function (PDF) p(s), called the s-PDF. After s is discretized into I intervals by s1,s2,…,si,…,sI+1, the 6DOF model is integrated with a given surface impact speed (v0) and each slope si to get bomb trajectory deviation r-hati at depth (h) as a model output. The calculated series of {r-hati} is re-arranged into monotonically increasing order (rj}. The bomb trajectory deviation r within (rj, rj+1) may correspond to one interval or several intervals of s. The probability of r falling into (rj, rj+1) can be obtained from the probability of s and in turn the PDF of r, called the r-PDF. Change in the r-PDF versus features of the s-PDF, water depth, and surface impact speed is also investigated. DEWEY : 629.8 ISSN : 0022-0434 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JDSMAA00013300 [...] [article] Probability density function of underwater bomb trajectory deviation due to stochastic ocean surface slope [texte imprimé] / Chu, Peter C., Auteur ; Fan, Chenwu, Auteur . - 2011 . - 13 p. Systèmes dynamiques Langues : Anglais (eng) in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 133 N° 3 (Mai 2011) . - 13 p. Mots-clés : 3D underwater bomb trajectory model Probability density function Bomb deviation Stochastic ocean surface slope 6DOF STRIKE35 Index. décimale : 629.8 Résumé : Ocean wave propagation causes random change in an ocean surface slope and in turn affects the underwater bomb trajectory deviation (r) through a water column. This trajectory deviation is crucial for the clearance of obstacles such as sea mines or a maritime improvised explosive device in coastal oceans using bombs. A nonlinear six degrees of freedom (6DOF) model has been recently developed and verified at the Naval Postgraduate School with various surface impact speeds and surface slopes as model inputs. The surface slope (s) randomly changes between 0 and pi/2 with a probability density function (PDF) p(s), called the s-PDF. After s is discretized into I intervals by s1,s2,…,si,…,sI+1, the 6DOF model is integrated with a given surface impact speed (v0) and each slope si to get bomb trajectory deviation r-hati at depth (h) as a model output. The calculated series of {r-hati} is re-arranged into monotonically increasing order (rj}. The bomb trajectory deviation r within (rj, rj+1) may correspond to one interval or several intervals of s. The probability of r falling into (rj, rj+1) can be obtained from the probability of s and in turn the PDF of r, called the r-PDF. Change in the r-PDF versus features of the s-PDF, water depth, and surface impact speed is also investigated. DEWEY : 629.8 ISSN : 0022-0434 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JDSMAA00013300 [...]

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