动力陀螺式导引头跟踪能力分析

动力陀螺式导引头（下文中简称导引头）的跟踪能力是影响制导精度的主要因素之一。为分析导引头跟踪能力，定义了导引头跟踪能力性能指标。通过建立导引头的耦合动力学模型，对稳像及跟踪能力的传递函数及动力学模型稳定性进行解析和频域分析。从动力学稳定性的角度得出了限制导引头跟踪能力的根本原因。通过对比导引头半实物仿真与数学仿真结果，验证了动力学模型的精确性。为减小稳态失调角，提高导引头的跟踪能力，提出了PI校正，仿真分析发现通过调整比例积分系数可以达到减小失调角并且不降低其他性能指标的目的。进一步探讨了在导引头失调角为0时目标视线角速度信息的提取方法。此文可以为导引头动力学及控制系统设计提供指导。

Tracking performance of gyro-stabilized seeker

Tracking performance of gyro-stabilized seeker (following called seeker for short) is a main factor of the guidance precision. To analyze the tracking performance of seeker, seeker's tracking performance index Q was defined. Coupled dynamics model of seeker was established, and transfer functions of the image stabilization and tracking performance and the stability of dynamics model were analyzed. The fundamental reason to the limits of seeker's tracking performance was derived from the point of view of dynamics stability. Seeker's dynamic model was proved correct when compared the Hardware-In-Loops simulation with the mathematical simulation results. In order to reduce boresight and improve tracking performance of seeker, PI compensation was proposed. The simulation results show that boresight can be reduced as well as other performance is not deteriorated by adjusting the proportion and integration parameters. It is discussed further that how to extract line of sight rate when boresight is 0. It can provide guidance to design the dynamics and control system of seeker.