Abstract: An angular motion equation in complex form is established to study the angle of attack and velocity characteristics of spin-stabilized 2D trajectory correction projectile under the effect of fixed canards. The solution of forced motion when the canards spin at a constant rate and the analytical solutions of transient and steady state responses when the canards generate step excitation are both derived. The relationships between the amplitude and phase angle of average deflection angle and the parameters of the fixed canards are presented by deriving the analytical solutions of average velocity deflection angle. The flight stability conditions of spin stabilized 2D trajectory correction projectile under the effect of fixed canards are proposed. The result shows that the projectile should avoid resonance without control, and should limit the maximum increment of angle of attack and the equilibrium angle of attack with control. In addition, the phase angle of average deflection angle has a lead angle ahead of the roll angle of fixed canards. The results provide some references for the studies of flight stability and guidance method of spin-stabilized 2D trajectory correction projectile. Key

Key words: ordnancescienceandtechnology, two-dimensionaltrajectorycorrectionprojectile, angularmotion, flightstability, resonance, responsespectrum