Abstract: The application of extended Kalman filters to compensate for the disturbance from plane movements fort he radar system on the plane-board is researched in this paper instead of tradit ional met hods which used velocity gyro. Now in t he plane-board radar antenna system, the extended Kalman filter is adopted to estimate the elevationand azimuth angles of a tar get plane as driving signals for the radar system to track the target. At the same time,t he new method can also compensate for the delay of detection signals. I n addit ion, target movement is describedwith the Singer model in an orthogonal coordinate system and the measurement signal is estimated by an extendedKalman filt er in the polar coordinate system, that is to say, measur ement equations ar e linear ized in each step tomake the conversion of t he equat ions to the orthogonal coor dinate system. With Matlab/ Simulink softwar e the modeling, design and simulation are successfully finished and satisfactory results are also obtained.

Key words: radar control, Kalman filter, control system, simul ation, Matlab/Simulink