Principle And Simulation Analysis Of Duck Rudder Ballistic Correction Mechanism

In modern war,precision-guided weapons are used more and more frequently,which can precisely destroy the target and minimize the civilian casualties.However,the high precision strike force is often accompanied by high cost.Under this background,ballistic correction projectile comes into being.Ballistic correction projectile has become a research hotspot in recent years because of its low cost and good hit accuracy.Meanwhile,the research of correction mechanism related to it is becoming more and more important.In this paper,a new two-dimensional trajectory correction mechanism is designed for the 120 mm modified mortar projectile.Aiming at the movable rudder wing structure with "one" shape layout,a correction strategy of one quarter of the rotation cycle of the projectile is adopted.The correction principle is described in detail,and the possibility of its implementation is verified theoretically.According to the proposed performance index of the steering gear,the aerodynamic force of the rudder wing is calculated,and the rudder wing is determined.The combination of planetary gear and space connecting rod is designed as the transmission mechanism of steering gear.According to the calculated parameters,the dynamics model of steering gear transmission mechanism is established,and the simulation analysis shows that the mechanism meets the transmission accuracy requirements.In order to study the load resistance and vibration characteristics of the mechanism,the finite element method is used to simulate the mechanism,and the results show that the mechanism meets the corresponding requirements.The hydrodynamic simulation analysis of the mortar is carried out,the relevant aerodynamic parameters are obtained,and the aerodynamic characteristics are analyzed.By using the multi-platform co-simulation including aerodynamic research,data processing and dynamics analysis,the relevant parameters of the outer trajectory were obtained,and the reasonable position and correction ability of the new mortar projectile were studied.Through modeling,dynamic simulation,finite element simulation and other methods,the structural reliability,kinematic characteristics,anti-overload capability and other aspects of the correction mechanism are analyzed to ensure that the mortar loaded with this mechanism has a more satisfactory aerodynamic characteristics and correction effect.The research results of this paper can provide a feasible reference for the future research of new intelligent ammunition.