The Research On Swing Fuze Nose Trajectory Correction Technology For Low Spin Rocket Missile

Improving hitting accuracy, increasing gunshots, and controlling damage power, are always the trend of weaponry developing and the goal of each nation pursuing incessantly. However, as the exact guidance weapons' price is heavy, no nation can endure its exhaustion on war field. Recent years, the trajectory correction fuze appearing, which provides a cheap means for developing conventional weapon, it becomes each nation's precedence developing technology. Against this background and with a view to our country's practical situation, we research the two dimension trajectory correction fuze technology for low spin rocket missile in this article. The research of this technology has important meaning against improving the rocket weapon's hitting accuracy.This article has analyzed the state of rocket under stress and its space motion firstly, based on the classical mechanics and the aerodynamics theory, and the space rigid body motion principle. And the rocket's space 6D trajectory model has been established. Also, based on the CFD fluid simulation technique, we has simulated and analyzed the trajectory correcting aerodynamic force using the FLUENT software tool, and found the force's estimate expression. Finally, we established the trajectory control model.On this base, applying dynamic inverse control theory and three-time scale separation principle, the trajectory correction control law has been designed. And analyzed each dynamic inverse loop's stability based on Lyapunov theory, discussed the inverse error of control system. The next, we researched the trajectory correction strategy, put out the correction flow, and proposed a way to regulate some important parameters using fuzzy control method.The simulation and analysis for having control and no control trajectory characteristic has processed. Specially, we simulated and analyzed particularly the each dynamic inverse sub-control loop and the whole control system. The results show that the dynamic inverse control law is efficiency and the path tracking ability can meet requires.In the end, the earlier design of trajectory correcting actuator is processed. It also has been analyzed the requirement of actuator needing meet, and proposed an actuator made of motor-driven and gear-driven. Besides, an execution algorithm for actuator is brought forward.This article makes detailed study on trajectory correction fuze, research findings can provide design reference for some relative projects, and provide new idea for the trajectory correction fuze technique development. It has the definite reference value.