Research On Key Technology Of Rolling Reducing And Control Of Controlled Rolling Rudder System

Simple correction monition has been a research hotspot. Through the trajectory correction mechanism reduces the trajectory error, improves the accuracy and combat efficiency of the ammunition, but it usually requires the projectile rotating speed is low. Anti-spin stability control technology based on modified mechanism is studied in this thesis, and simple correction mechanism is designed which is connected with missile body by bearings, and has two pairs of rudder, one pair produces modified lift with symmetrical layout, and the other reduces rotation and control the nose of warhead structure stabilizes. In order to realize the anti-rotation stability performance of warhead correction mechanism, the following work is completed.According to the design requirements, firstly, the structure composition, action principle and stress condition of modified warheads are analyzed, Mainly includes the rolling moment formed by rolling vane and the friction resistance moment by connecting bearing in the body of high rotation, and roll torque output formula with the nose of warhead speed and correction rudder angle position is deduced, and theoretically verified.Second, the servo system is designed, which includes a DSP Controller and related circuit, DC torque motor, mechanical transmission structure etc. The theoretical model is established for dc torque motor, and aerodynamic simulation is made for the lift, drag, rolling moment of modified mechanism in different roll steering angle and different Maher number, obtaining the coefficient of lift table and roll moment coefficient table under different conditions.Finally, hardware circuit and motor drive circuit based on DSP Controller is built, and the tricycle closed loop algorithm includes current loop, speed loop, position loop is designed for servo controller using MATLAB/SIMULINK and SISO tools, obtaining the transfer function which is discrete and written into DSP Controller, and at the same time, other modules for servo control system are designed. Basically, the correction function of the controllable roll steering system is implemented.Experimental results of controllable roll steering system show:the system can reach the design target, design plan is feasible.