机载雷达天线伺服控制扰动观测器建模仿真

机载雷达天线伺服控制的精度是雷达系统精确搜索、识别和探测目标的重要指标之一。由于风速和载体运动速度的影响，雷达天线做扫描运动时会承受较大的空气阻力，空气阻力随着时间和扫描运动角度的变化而变化，使雷达天线伺服控制产生附加负载扰动转矩。为了尽可能减小扰动对雷达伺服控制精度的影响，本文提出一种基于扰动观测器的雷达天线伺服控制解决方案。建立雷达天线伺服控制系统的动力学模型、伺服控制模型，将空气阻力产生的附加转矩通过扰动观测器引入被控对象的控制输入端进行补偿，并对不同风速影响进行建模仿真和试验分析。结果表明：基于扰动观测器的雷达天线伺服控制精度有显著提高。

Modeling and Simulation of Airborne Radar Antenna Servo Control With Disturbance Observer

Accuracy of airborne radar antenna servo control(ARASC) is one of important index for radar system precision search, identification and detection. Radar antenna was dropt and scan movement, because of wind speed and movement speed of carrier, making radar antenna recived more atmosphere resistance, atmosphere resistance was ceaseless change along with time and different angle of scan movement, it would be bring additive load distubance torque to ARASC. In order to controlling disturbance for accuracy of ARASC influence, improving ARASC movement preiciosn, ARASC disturbance observer(DOB) solving schene was put forward. ARASC dynamic model and servo control model were set up,additive load torque chose by atmosphere resistance was import to input end of controoled object for putting up compensate, according to improving accuracy in fact environment. Moeding simulation and expeerimentation analysis were put up with different wind speed influence,simulation experimentation show ARASC accuracy based on disturbance observer is better.