雷达导引头天线罩误差对制导精度影响研究

The Study on Miss Distance of Radar Seeker Guided Missile Due to Radome Slope Error

为分析天线罩误差对脱靶量的影响,首次通过伴随法及无量纲化方法建立了包含天线罩误差寄生回路的无量纲化制导回路,给出了不同噪声输入下的无量纲脱靶量表达式。经仿真给出了寄生回路的稳定域及噪声输入下天线罩误差变化时的无量纲脱靶量曲线,仿真结果表明:除噪声功率谱密度、弹目相对运动速度和制导系统自振频率会影响脱靶量外,较小制导系统阻尼对天线罩误差更敏感,负的天线罩误差比正的天线罩误差对稳定性影响更大。

In order to analyze the effect of radome slop error on miss distance, the model of guidance loop including the radome slope parasitical loop was constructed for the first time. The dimensionless guidance loop including radome slope parasitical loop and quadratic seeker and autopilot model was built and the dimensionless miss distance expressions driven by various noises were presented. The stability boundary of parasitic loop and the dimensionless miss distance plot were presented. The simulation results show that smaller damp ratio of guidance system is more sensitive to the radome slope and negative radome slope makes bigger miss distance than the positive one.