Abstract
Based on the lift-to-drag ratio of a two-dimensional trajectory correction projectile, in this paper, a novel correction efficiency coefficient model has been proposed for the trajectory optimization of a two-dimensional trajectory correction projectile, and research on the influence a correction efficiency coefficient has on the flight parameters of correction trajectory is carried out. A series of results are obtained through theoretical analysis and simulation calculations, indicating that, the smaller the value of the correction efficiency coefficient is, the stronger the correction ability of the projectile reserves. The trajectory and canard geometry of the correction section of the two-dimensional trajectory correction projectile are optimized by the Gauss pseudo-spectral method and correction efficiency coefficient, and, after taking the correction efficiency coefficient into account, the projectile can accurately hit the target and effectively eliminate the swing phenomenon of the projectile’s lateral trajectory. Meanwhile, a stable roll control command is obtained. When the diameter aspect ratio of the canard is 0.4, both the flight state quantity of the optimized projectile and the roll control command are more stable, and, when the canard shape is trapezoidal, the correction efficiency coefficient is smaller, the result of trajectory optimization is more stable, and the stability of the output roll control command is better. The research results of this paper can provide certain references for both the designs of the two-dimensional trajectory correction projectile’s trajectory and the canard geometry.
Highlights
The two-dimensional trajectory correction projectile is a guided projectile whose fuze is changed from a conventional projectile to a two-dimensional correction component to achieve the precise suppression of the target
The trajectory of a two-dimensional trajectory correction projectile can be divided into two sections, namely the uncontrolled section and the correction section, and the optimizing of the latter can directly affect the Aerospace 2022, 9, 149 trajectory correction projectile can be divided into two sections, namely the uncontrolled section and the correction section, and the optimizing of the latter can directly affect the sshhooootitninggaacccucurarcaycyanadndddamamagaegeefefeffcetcotfotfhtehperporjeocjeticltei.leH. eHnecnec, eit, iist ims emaenainnginfuglfutol teosteasbtlaibshlisah reaarseoansaobnlaeboleptoimptiizmatiizoantimonomdeoldaenldadnedtedremteirnme itnhee tohpetiompatlimtraaljetcrtaojeryctoofrythoefpthroejepcrtoiljeecintiltehien ctohrereccotirorencstieocntiosenc[t2io].n [2]
The main contribution of the research results of this paper is to put forward a new concept of a correction efficiency coefficient (CEC) that can be used as the objective function to control the two-dimensional trajectory correction projectile to hit the target, and, at the same time, in the geometric structure design of canards
Summary
The two-dimensional trajectory correction projectile is a guided projectile whose fuze is changed from a conventional projectile to a two-dimensional correction component to achieve the precise suppression of the target. The main contribution of the research results of this paper is to put forward a new concept of a correction efficiency coefficient (CEC) that can be used as the objective function to control the two-dimensional trajectory correction projectile to hit the target, and, at the same time, in the geometric structure design of canards. FZ = QScy β + QScNδ δz sin γf According to the two-dimensional trajectory correction projectile angular motion equation, the moment equilibrium condition is derived, which is used to establish the CEC model later.
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