Dynamic Stability of Spin-stabilized Projectile with Spoiler

doi:10.3969/j.issn.1000-1093.2021.08.005

Abstract

Abstract: The dynamic stability of spin-stabilized projectile with spoiler is analyzed to develop a new type of trajectory correction projectile. The dynamic model of the spin-stabilized projectile with spoiler is derived and simplified to obtain its non-homogeneous angular motion equation. The analytical solutions of the transient and steady-state responses of angle of attack under step excitation are obtained by using the non-homogeneous angular motion equation. The effects of structural, flight and aerodynamic parameters on the bifurcation characteristics and stability of the system are analyzed based on the nonlinear angular motion equation. The correction ability of the spin-stabilized projectile with spoiler was analyzed by numerical calculation. The results show that the analytical solution of the angle of attack has high accuracy, the aerodynamic parameters have a great influence on the stability region of the equilibrium point of the dynamic system, and the control efficiency of the spoiler is very high.

Key words: spin-stabilizedprojectile, spoiler, trajectorycorrection, nonlinearbifurcation, stability

CLC Number:

TJ012.3⁺3

YANG Jie， CHANG Sijiang， WEI Wei. Dynamic Stability of Spin-stabilized Projectile with Spoiler[J]. Acta Armamentarii, 2021, 42(8): 1613-1623.

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