Research On A Single-axis Hollow Fixed Duck Rudder Type Actuator Carried By The Missile

With the enhancement of maneuverability and protection technology of combat targets in modem warfare,there is an increasing demand for sunder armor ammunition.It is very important of guidance transformation of traditional sunder armor ammunition.As a commonly used actuator of trajectory correction projectile,the single-axis rotary controllable rudder-typed correcting mechanism has the advantages of high reliability,high efficiency and simple structure.The solid parts,commonly applied inside of the trajectory correction projectile,which has great influence on the formation of the jet while it is used to the traditional projectile with the shaped charge warhead guidance transformation.Therefore,the structure of the fixed-rudder actuator needs to be improved so that it can be applied to the trajectory correction projectile with the shaped charge warhead so as to realize the guidance transformation of the traditional armor-piercing projectile.In order to reduce the influence of the duck rudder correction actuator on the power of the trajectory correction projectile with the shaped charge warhead using this kind of actuator,the hollow improvement should be executed.At first,aiming at erasing the influence of the actuator pre to the projectile with the shaped charge warhead and considering the position relationship between the components,the actuator drive layout scheme was improved.Based on this scheme,the type of hollow shaft drive motor was selected.In combination with the limitation of the actuator size and the requirement of the hollow shaft diameter of the projectile jet,the design of the hollow shaft drive motor of the actuator in this paper is mainly around that enough torque should be generated by the minimum-size drive motor within the limited space of certain inner and outer diameter.Secondly,the traditional magnetic circuit method was used to calculate the hollow shaft motor with certain performance index.The applicability of the magnetic circuit method to calculate the motor parameters of the hollow shaft was analyzed.Factors affecting the output performance of the drive motor were concluded by the equivalent magnetic circuit analysis of the actuator.Based on the Maxwell 2D,the single variable simulations were conducted by finite element analysis and the influence of each parameter on the output performance of the drive motor was analyzed.The results provide reference for the parameter selection of such hollow shaft motor.Finally,in order to evaluate the rationality of the layout scheme and the accuracy of simulation results,based on the semi-physical test platform,the prototype of the supporting actuator was designed.Through the performance test of the hollow shaft motor in this paper,the rationality of the scheme design and the reliability of the simulation results were verified.