Tracking a target is an essential function of a seeker for missiles. The target tracking mechanism of a seeker consists of gimbals, mounted with gyroscopes, and an antenna or some other energy receiving devices such as radar, infrared (IR), or laser. Stabilization of such a gimbal is necessary for any guided missile to maintain the tracking device always pointing towards the target. For the stabilization of the gimbal system, several control methods have been employed for making the gimbal to follow an input rate command by eliminating all the gimbal disturbances. Here, a new self-tuning fuzzy logic-based proportional, integral, derivative (PID) controller is introduced for the stabilization of a two-axis gimbal for a manoeuvring guided missile. The proposed control method involves tuning the gains of the PID controller based on the fuzzy logic rule bases considering the missile body rotation. The performance of the stabilization loops has been verified through MATLAB simulations for fuzzy logic-based PID controller compared with the conventional PID controller. The simulation results show the response of the gimbal system with stabilization loops met the control requirements with fuzzy PID controllers but not with conventional PID controllers.

中文翻译：

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一种新型的自寻优基于模糊逻辑的PID控制器用于导弹搜索器的两轴稳定器稳定

跟踪目标是导弹寻找者的基本功能。搜寻器的目标跟踪机制由安装有陀螺仪的万向架，天线或其他一些能量接收设备（例如雷达，红外（IR）或激光）组成。对于任何制导导弹来说，稳定这种万向架都是必要的，以保持跟踪装置始终指向目标。为了稳定万向架系统，已经采用了几种控制方法，以通过消除所有的万向架干扰使万向架遵循输入速率指令。在这里，一种新型的基于自校正模糊逻辑的比例，积分，微分（PID）控制器被引入，用于稳定机动制导导弹的两轴万向节。所提出的控制方法包括基于模糊逻辑规则库并考虑导弹主体旋转来调整PID控制器的增益。与传统的PID控制器相比，基于MATLAB的基于模糊逻辑的PID控制器的MATLAB仿真已验证了稳定环的性能。仿真结果表明，具有稳定环的万向节系统的响应满足模糊PID控制器的控制要求，而常规PID控制器则不满足。