中文摘要：

从防御雷达对再人弹道跟踪效果的角度，对滑翔式再入飞行器的突防性能进行了初步分析。基于Unscented卡尔曼滤波和考虑气动模型的目标跟踪模型，加入雷达测量噪声，计算目标跟踪误差，比较弹道式与滑翔式再入弹道的跟踪效果。仿真结果表明：（1）滑翔式再入弹道有横向机动且飞行高度较低，雷达的发现时间较晚，可观测时间比较短；（2）由于雷达的跟踪动力学模型中很难对气动力准确建模，滑翔式弹道借助气动力产生机动，雷达对其跟踪的误差要大于弹道式再入弹道；（3）在相近的雷达观测条件下，弹道机动性越强，雷达跟踪精度越差；（4）尽量使防御方所假设的目标动力学模型失配是增加突防能力的有效措施。

英文摘要：

The radar tracking performance for conventional reentry trajectory and glide-reentry trajectory is studied respectively. Based on the Unscented Kalman Filter and target dynamics model, the tracking error including the measurement noise of radar is calculated and the tracking performance is compared. The simulation results indicate that： （ 1 ） the gliding reentry trajectory compared with the ballistic reentry trajectory is to be found later and its observation time is shorter for its cross maneuverability and the lower flight altitude ; （2） the radar tracking error of glide trajectory is larger than that of ballistic trajectory for the reason of the difficulties in aerodynamic modeling of tracking dynamics for the glide trajectories; （3） the more maneuverable of trajectories, the worse of tracking accuracy under the almost same observation condition of the radar ; （4） the effective method for penetration is to make the dynamics model supposed by the defense side most possible mismatch.