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

Abstract

Accuracy of airborne radar antenna servo control(ARASC)is one of important index for radar system to accurately search,identify and detect targets.Radar antenna bears greater air resistance during scanning motion,because of the wind speed and moving speed of the carrier.As the atmosphere resistance is changed along with time and different scan movement angle,it will bring additional load disturbance torque for ARASC.In order to control the influence of disturbance on accuracy of ARASC,which based on disturbance observer(DOB),a solving scheme is put forward in this paper.ARASC dynamic model and servo control model are established,additional load torque generated by atmosphere resistance is import to input of controlled object for putting up compensate to improving accuracy in practical environment.Modeling simulation and experimentation analysis are put up with different wind speed influence,simulation experimentation show accuracy of ARASC based on disturbance observer is improved obviously.

Keywords

• airborne radar antenna
• servo control
• disturbance observer
• modeling and simulation