Study Of Rapid Drive Technology And Control Strategy Of Vertical System

Missile launching vehicle is an important carrier of missile mobile launching.In order to adapt to the modern war and improve the missile’s rapid response ability and launch accuracy,it needs to reduce the preparation time before launching,and the speed of the erecting process has become the core issue of whether the missile can preempt the battlefield initiative.Taking the erecting system of heavy-duty missile based on multi-stage cylinder as the research object and taking the quick erecting and reducing vibration as the optimization objective,this paper puts forward a kind of optimized erecting system of gas hydraulic hybrid drive,which takes the gas power assisted device as the auxiliary energy.Through the instantaneous high-power output characteristics of the gas generator,the gas energy is converted into the hydraulic pressure to provide energy for the initial stage of Missile Erecting.After reaching a certain angle,it switches to the hydraulic drive.The model predictive control algorithm is used to control the vertical speed of the valve controlled multi-stage cylinder to achieve the precise control of reducing the impact of stage change and the vertical stroke of the missile.In this paper,firstly,the overall design of the erecting system includes gas generation and conversion system,hydraulic control system and multi-stage cylinder drive system.According to the demand,the form and composition of gas generator grain are selected,and the multi-stage cylinder buffer structure and hydraulic control system are designed.The theoretical model is established according to the established system to prepare for the subsequent simulation analysis.The simulation model of multistage cylinder erecting system is built by AMESim,the simulation model of gas power system and control system is built in Simulink,and the joint simulation of AMESim and Simulink of erecting system is realized by establishing two platform interface.The optimal structure of the gas power unit is explored by changing the parameters such as the charge form of the gas generator and the area ratio of the intermediate conversion cylinder.This paper studies the different mechanism of stage change shock of multistage cylinder in gas and hydraulic driving stage,and verifies the effectiveness of stage change buffer structure on vibration suppression.The simulation results show that the gas assisted method can greatly improve the initial kinetic energy of the erecting system,and the model predictive control algorithm and the multi-stage inter cylinder buffer structure can effectively reduce the vibration acceleration of the erecting process,which can better meet the design indexes of the system.At the same time,the research on the gas assisted erecting device by simulation also provides a quantitative reference for the actual project.