基于无滚转导弹两级轴线出现偏差的级间分离运动分析

针对导弹飞行过程中存在扰动因素影响时两级轴线出现偏差的情况,建立了无滚转导弹的偏差分离模型。基于此模型,对常风、发动机推力偏差、连接误差等3种扰动下的导弹级间分离过程进行了仿真计算。计算结果表明,仅存在垂直风影响时,导弹俯仰角增大较多,分离过程时间减少,发动机推力正偏差和横移加快弹体分离,发射时助推级俯仰角不变,不同主级连接误差对分离过程时间影响微弱。计算结果与飞行力学理论一致,进一步证明了偏差分离模型的正确性。

Stage separation movement analysis based on deviation of two sector axes for non-rolling missile

A stage separation model of non-rolling missile was established in case that two sector axes of missile were deviated by disturbance factors in the course of flight.Stage separation of missile with three disturbance factors was simulatively calculated based on the model,i.e.constant wind,thrust deviation of motor and connection error.The calculation results show that pitching angle increases greatly and separation period becomes short when there only exists vertical wind acting on the missile.Positive deflection and lateral displacement of motor thrust can promote the separation process.If pitching angle of booster in launch is constant,the effect of different main sector connection error on separation process is weak.The results are in accord with the flight dynamics theory,which can further prove accuracy of the model.