某型光电跟踪系统伺服控制器建模与仿真

Study on Modeling and Simulation of a Type of Photoelectric Tracking System Servo Controller

以某型地空导弹为背景,采用视觉伺服技术,设计了光电跟踪系统的伺服控制器;系统采用半闭环结构。通过控制对象的分析选择了永磁式直流电机作为执行机构,并建立数学模型;设计了电流环反馈,保证系统的快速响应,并可对电机进行过流保护;位置环采用串联超前校正和PA放大器;通过Bode图分析,本系统符合要求;仿真分析结果表明,本系统具有响应快、超调小等特点,并能够快速平稳的跟踪低频运动的目标。

In the context of a certain type of ground-to-air missiles,by using visual servo technology,a servo controller is designed with photoelectric tracking system,which uses a semi-closed cycle structure.By analyzing the control objects,the permanent magnet DC motor is selected to be its actuator system,and a mathematical model is created after that.The servo controller designs the current loop feedback system to ensure rapid response,and provides the motor overcurrent protection.The Position loop is designed with series lead correction and PA signal amplifiers.By analyzing Bode diagram analysis,the system is eligible to meet the requirements.The simulation results show that the system has characteristics of fast responding,small overshooting,and the ability to quickly track smooth low frequency motion.