Abstract: The premise of realizing the trajectory correction of two-dimensional trajectory correction fuze is to control the spin rate of fixed canards. Based on the 155mm fixed-canards projectile with two-dimensional trajectory correction fuze, the spin characteristics of projectile body and canards during dual-spinning are analyzed, respectively. A motion model of dual-spin stabilized projectile under the action of fixed canards is established. The two-dimensional trajectory correction fuze of 155 mm fixed-canard dual-spin projectile is simulated to calculate the aerodynamic parameters of canards by using CFD software. The dynamics equation of rolling channel is analyzed, and the characteristics of whole ballistic spin rate are analyzed from the following aspects: moment of inertia, moment of friction, rolling damping moment, and moment of canard guide roll moment. On the basis of spin rate control, the correction capability of two-dimensional trajectory correction fuze is evaluated. The simulated results show that 5.0-5.5 degrees of the rotating canards and 8-9 degrees of the modified canard can meet the requirement of balancing spin rate and the correction capability for control, and the simulated results of spin rate can represent the rotational speed characteristics of dual-spin-stabilized projectiles with course correction fuze and precision guidance kit. Key

Key words: 155mmdual-spinprojectile, two-dimensionalcorrectionfuze, 7-DOFdual-spinmodel, dual-spinrate, canardaerodynamicparameter, correctionability