机液耦合多管火箭发射系统动态仿真

基于ADAMS建立了机械系统和液压系统耦合的某多管火箭发射系统虚拟样机,给出了发射系统仿真过程中变结构的自由切换方法,分析该新型火箭发射系统发射动态特性,用灵敏度分析法分析泄漏对系统发射过程的影响,并比较了在全支撑和半支撑的两种工况下发射系统动态稳定性。结果表明采用液压伺服瞄准系统其发射精度是可以保证的,为该新型火箭发射系统的设计和发射提供了一定的理论依据

Dynamic Simulation Coupled with Mechanism-liquid Model for Multiple Launch Rocket System

Based on multi-body-dynamic theories,the virtual prototype of new Multiple Launch Rocket System(MLRS)combined with mechanism-liquid coupling model was created by using ADAMS software.Free switch method of variable structure system during dynamic simulation for the launching system was given.With a view to the launching accuracy,the semi-relative sensitivity was used.It was concluded that the leakage made the launching accuracy worse if the relative learance of piston was larger than threshold value.Finally,launch dynamics simulation was achieved based on virtual prototype according to the condition of whole-support or semi-support.It is proved that the launching stability is better under the condition of whole-support.In conclusion,the results show that the new coupled MLRS can achieve the required launch accuracy.