Temat: modified point mass

Skocz do pozycji: 1.

Tytuł:: Explicit form of the “modified point mass trajectory model” for the use in Fire Control Systems
Autorzy:: Baranowski, L.
Majewski, P.
Szymonik, J.
Tematy:: ballistics
equations of motion
projectile path
modified point mass trajectory model
MPMTM
projectile deflection; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/200333.pdf Link otwiera się w nowym oknie
Opis:: The main objective of this article is to obtain equations of motion of the spin–stabilized projectile in the presence of non–constant wind. Introducing models allowing utilization of inhomogeneous wind is dictated by new possibilities created by the use of e.g. lidars in the Fire Control Systems (FCS). Constant feed of wind data can replace meteorological messages, increasing the FCS effectiveness. Article contains results of projectile flight simulations which indicate the positive effect that the derived explicit form of the model has when considering software development for modern Fire Control Systems.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Explicit “ballistic M-model”: a refinement of the implicit “modified point mass trajectory model”
Autorzy:: Baranowski, L.
Gadomski, B.
Majewski, P.
Szymonik, J.
Tematy:: ballistics
equations of motion
projectile path
modified point mass trajectory model
MPMTM
projectile deflection
balistyka
równania ruchu
lot pocisku; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/202089.pdf Link otwiera się w nowym oknie
Opis:: Various models of a projectile in a resisting medium are used. Some are very simple, like the “point mass trajectory model”, others, like the “rigid body trajectory model”, are complex and hard to use, especially in Fire Control Systems due to the fact of numeric complexity and an excess of less important corrections. There exist intermediate ones - e.g. the “modified point mass trajectory model”, which unfortunately is given by an implicitly defined differential equation as Sec. 1 discusses. The main objective of this paper is to present a way to reformulate the model obtaining an easy to solve explicit system having a reasonable complexity yet not being parameter-overloaded. The final form of the M-model, after being carefully derived in Sec. 2, is presented in Subsec. 2.5.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Study on modeling and production inaccuracies for artillery firing
Autorzy:: Khalil, Mostafa
Tematy:: artillery firing table
modified point mass
meteorological message
Coriolis effect
genetic algorithm GA
masa punktowa zmodyfikowana
wiadomość meteorologiczna
efekt Coriolisa
algorytm genetyczny; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2065762.pdf Link otwiera się w nowym oknie
Opis:: Production and assessment of artillery firing tables (FT) are the key tasks in solving ballistic problems through both standard and non-standard firing conditions. According to the literature, two different standard firing table formats were developed by the former-Soviet and the United States armies. This study proposes the main difference between these FT formats, as the standard meteorological conditions. An accuracy assessment has been proposed to justify different sources of errors through modeling and production of such tables, including applied meteorological message, aiming angles round-off, linear superposition principle, and Earth approximation. A~case study has been proposed for the 155M107 projectile to demonstrate the impact of the Coriolis effect as well as other ballistic and atmospheric non-standard conditions. As a part of the construction of artillery FT, a fitting process has to be made between available firing data and simulations. Therefore, a parametric study is implemented to study the number of test elevations per charge needed through the fitting process and its corresponding production error. Hence, based on the number of test elevations available, the genetic algorithm (GA) has been utilized to obtain the test elevations order needed with minimum FT production error. The results show a good agreement with the data stated in the literature.
Dostawca treści:: Biblioteka Nauki

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