Method for predicting uncontrolled reentry landing areas of boosters based on stability analysis
The impact booster after separation of the carrier is important for the design of the control and recovery system in the Safety Zone,however,in the course of booster reentry,the loss of attitude control capability leads to the large range of attitude motion and the complex motion law.Traditional models often use the combination of limit deviation or 6DOF shooting to predict the impact area of booster,there are some problems,such as too large prediction range and insufficient significance of prediction method for forward design of landing point prediction range.A method based on nonlinear dynamic balance theory is used to analyze the dynamic stability characteristics of three-channel coupled attitude motion in the process of uncontrolled reentry,and to identify the inherent periodic attitude motion modes,based on the finite natural mode,the equivalent particle motion model is established to analyze the impact area of the separated booster rapidly and accurately,and the sensitivity analysis of the impact of the booster characteristic parameters on the impact area can be carried out,to guide the positive design of the area.The simulation results show that this method can greatly improve the prediction accuracy of the booster's Landing Point,and is more efficient and instructive than the 6DOF shooting method,it provides an important support for the safety design of the flight area of the rocket-propelled vehicle.
nonlinear dynamics balancemode identificationboosterprediction of impact point
NETL
NSTL
万方数据
