红外末制导导弹中制导数据链周期指标研究

Data-Link Period Evaluation of Middle Guidance for IR Missiles

研究中远程红外末制导导弹大离轴角发射中制导数据链周期指标优化问题。红外导引头由于视场角窄,截获距离随目标方位变化,中制导是保证导引头截获目标的基础。制导采用带离轴角补偿的真比例导引,数据链更新周期内目标运动位置采用外推法进行估计,对中制导数据链周期0.5s到3s研究了导引头最大截获距离和最小截获距离范围内导引头的截获性能,得到了中制导数据链周期指标的选择基准,并进行仿真。仿真结果表明,对发射后截获导弹制导系统优化设计具有参考价值。

Long range air-to-air missiles possess the features of high-off-boresight capability and lock-on after launch capability with a datalink. Because the narrow field of view and the variable lock-on ranges of the target ac- quisition with respect to target directions for missiles with Infrared seekers, the middle guidance system must be de- signed elaborately. To evaluate the effects of data-link period in middle guidance on seeker＇ s acquisition properties, the middle guidance law which uses a true proportional navigation with the compensation of off-boresight angle and high maneuvering targets were considered. In the guidance computation, target motions were estimated using extrapo- lating method. For datalink period from 0.5s to 3s, the off-boresight angles versus missile-target relative ranges be- tween the maximum and minimum of seeker＇ s detection scope were analyzed. The results are helpful in the middle guidance design for IR missiles.