Research On Modeling And Simulation Technology Of Missile Electric Sevo Mechanism

When a missile flies in the air,it will be affected by various kinds of internal interference(missile structure error,control instrument error,engine thrust error,etc.)and external interference(changes of air flow,wind and other meteorological conditions).These interferences will make the missile deviate from the scheduled flight orbit and cannot complete the specified tasks.In order to ensure that the missile can always fly according to the predetermined flight trajectory,we need to install servo control system on the missile.By receiving the command signal from the main control system,the missile servo system makes the nozzle of the engine generate the corresponding swing angle according to the command signal,so that the missile can return to the normal flight path.This project will rely on Co-simulation technology to complete the simulation of missile servo system,which can help designers get rid of the shackles of physical prototype,greatly reduce the cost of experiment,and quickly complete the design and optimization of missile servo system.Based on the above research background,this topic uses the Co-simulation method to model the missile electric servo mechanism and complete the simulation and verification.Firstly,by studying the composition and working principle of the missile servo system,the mathematical model of the missile servo system is built,and the index system of the missile servo system is established,so as to complete the whole model of the missile servo system;Then,the mechanical model of missile electric servo system is built with Solidworks software;Then the built mechanical model is transferred into ADAMS software,and the dynamic modeling of the model is completed in ADAMS software,and the rationality of the mechanical model of the missile electric servo system is verified;Finally,because the controller provided by Adams is too simple,this topic needs to use Simulink to design the controller of the missile servo system.By analyzing the stability,static and dynamic characteristics of the system,the traditional PID controller and sliding mode controller are designed,and the appropriate controller is introduced into the control model of the missile servo system.In the process of controller design and simulation,the real physical characteristics of servo mechanism can be fully considered by Co-simulation.The motion mechanism in Co-simulation replaces the principle prototype of traditional design.The joint iteration and optimization of controller and mechanism can be realized in the simulation link,and the single iteration cost is very low,which reduces the design link and effectively shortens the design cycle and design cost.The establishment process of Co-simulation model is more complex,but because the model established by ADAMS software is closer to the actual situation,its simulation effect is better than the traditional single subject simulation.Through the establishment of missile electric servo Co-simulation system,we can not only simulate the kinematics and dynamics of the electric servo mechanism,but also build the control system of the electric servo system.Through the interactive Cosimulation,we can provide technical basis for the development of the actual physical prototype.