Abstract
With the development of science and technology, significant changes have taken place in the mode of modern wars. Application of military operating concepts such as ‘surgical precision strike' and ‘decapitation strike' make higher demands on precision-strike weapons. Ballistic trajectory correction ammunition is being rapidly developed due to its lucrative combination of low cost, high cost-effectiveness ratio, high damage rate, and applicability of existing inventory ammunition. Ballistic control technology has distinct advantages both in cost saving and improvement of the ammunition operational performance. Nose deflection is a feasible, effective, and fast-response flight control mode. The nose part of a projectile can be deflected at a certain angle relative to the projectile body axis, including a pressure difference between the windward and leeward sides of the warhead and generating the respective aerodynamic control force. In this study, a two-rigid-body trajectory model is established based on the multiple rigid body system theory. The proposed model is used to predict the flight trajectory of a projectile with the deflectable nose. Finally, the nose deflection effect on the ballistic trajectory variation is analyzed. The research results obtained provide the theoretical basis for the development of adaptive control smart ammunition and its engineering applications.
Highlights
With a continuous development of weapons and military equipment, tectonic changes are observed in the state-of-the-art war strategies, which necessitate precision strikes on the enemy military objects with the minimization of collateral damage to civilians and civilian infrastructure
An innovative type of ammunition, which would be relatively cheap and combine high precision with enhanced damage efficiency, is very topical. Such an option is expected to be provided by the trajectory correction technology, which ensures the capability of firing range correction of a projectile reduces the initial shooting dispersion and improves the hit probability through several ballistic corrections
Aircraft with a deflectable nose part is a lucrative fast-response ballistic control method, which has been introduced for steering an aircraft while coasting at very high speed, which approach is applicable for steering a projectile in powered flight [3]
Summary
With a continuous development of weapons and military equipment, tectonic changes are observed in the state-of-the-art war strategies, which necessitate precision strikes on the enemy military objects with the minimization of collateral damage to civilians and civilian infrastructure. An innovative type of ammunition, which would be relatively cheap and combine high precision with enhanced damage efficiency, is very topical. Such an option is expected to be provided by the trajectory correction technology, which ensures the capability of firing range correction of a projectile reduces the initial shooting dispersion and improves the hit probability through several ballistic corrections. Characteristics of the flight flow field and pressure distribution of a projectile with deflectable nose control has been studied through methods of wind tunnel test [4,5,6,7] and computational fluid dynamic simulation [8,9,10,11].
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