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中文摘要：
以Yaw-pitch型导引头为研究对象,提出了一种具有鲁棒性的视线指向回路设计方法.根据各框架的动力学方程,建立了描述视线动态特性的微分方程,分析了干扰力矩、非线性和结构耦合等因素对框架结构运动与动力学特性的影响,对由基座角运动所致结构参数的摄动进行了定量估计,采用H∞稳定性理论设计了视线姿态的伺服控制器.仿真结果表明,所设计的回路对系统的不确定性、非线性和外界干扰力矩等因素具有较强的鲁棒性.
英文摘要：
A robust design approach was proposed to address the line-of-sight （LOS） control problem for a gimbaled seeker with yaw-pitch configuration. Differential equations on LOS dynamics were deduced via the moment balance of each gimbal. The different modes in which the major disturbances, including dis- turbance torque, system nonlinearity and platform angular motion, influence the system dynamics were an- alyzed. Based on the unstructured uncertainty descriptions of the system, a H∞ controller was synthesized to realize servo control on the LOS attitudes. Simulation results demonstrate that the proposed approach supplies strong robustness against system uncertainties, disturbance torques and nonlinearities.
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