平台式相控阵导引头视线角速率提取技术研究

摘要

To avoid the instability risk due to disturbance rejection rate(DRR)positive feedback in a strap-down phased array radar seeker,a new method is proposed for isolation of projectile influence by installing the phased array radar seeker on the platform framework.Through simplifying the phased array and the platform model,four methods of line of sight rate extraction are established for the phased array radar seeker on the plat-form by considering relationships of space angles and platform servo characteristics.The abilities of isolation and guidance signal tracking are analyzed separately by choosing different guidance signal output points.Re-search results show that all of the four approaches can avoid the influence of DRR.The method of platform rota-tion can improve guidance signal extraction accuracy.And the platform rotation based on the radar angle meas-urement output point can better track high frequency signal compared to the rate gyro output point.%针对全捷联相控阵雷达导引头隔离度（disturbance rejection rate，DRR）正反馈失稳风险，提出了一种将相控阵安装在平台框架用于隔离弹体干扰的新思路。通过对相控阵和平台模型进行简化，利用空间角度关系及平台随动特性，构建4种适用于平台式相控阵雷达导引头视线角速率提取的方案，选取不同的制导信号输出点，分别研究方案的隔离特性及制导信号跟踪能力。研究结果表明，4种方案均能有效规避 DRR 干扰影响，其中平台随动能提高制导信号的提取精度，雷达测角输出点优于平台角速率陀螺输出点，并具备跟踪高频信号的能力。