空空导弹平台相控阵导引头隔离度特性

为了满足空空导弹在跟踪高速大机动目标时对导引隔离度特性提出的严苛的要求,采取平台式相控阵导引头结构。提出的平台式相控阵导引头采用外框拉杆驱动、内框电机驱动的模型,并在此基础上建立了平台相控阵导引头的跟踪模型、隔离度传递函数模型,通过平台角速度前馈实现角速度解耦。研究了采用不同的前馈角速度提取点时对隔离度特性的不同影响。基于不同的隔离度模型研究了隔离度寄生回路稳定域分析和隔离度度寄生回路对制导系统的影响研究。通过上述研究,获得了平台相控阵导引头结构的数学模型,为后续工作奠定理论基础,验证了平台相控阵导引头结构方案具有与相控阵导引头相同的快速性,并且其隔离度水平为相控阵隔离度与平台隔离度的乘积,能够有效提高空空导弹制导精度。

Research of disturbance rejection effect performance of the phased array seeker with platform for air-to-air missile

In order to meet a hard demand for aircraft about the disturbance rejection effect (DRE) when tracking the target with great maneuver by using the phased array seeker. The phased array seeker with platform (PASP) is put forward firstly to avoid the severely constraint for the seeker. Then the mathematic model of the PASP are established. And the feedforward compensation method is used to complete the rate decoupling. By taking two methods of platform rate feedforwd into consideration, two basic PASP seeker structures are proposed. Based on that, the transfer function model of the platform phased array seeker of these two structures is established to study the design procedures and performance as well as research. In addition, the parasitic loop in guidance loop which is induced by the PASP DRE is established and the property is analyzed for PASP tracking loop and guidance loop design integration. And the research indicates that the PASP has a better performance than any other kind of seeker in tracking rapidly target and can improve the guidance precision effectively.