Seeker Head Line-of-Sight Control Using Sliding-Mode Control

摘要

Low cost seeker head line-of-sight control design presents a great chal-rnlenge due to system uncertainty and internal disturbances, e.g. friction,rncaused by the simple system components. Using conventional controlrnmethods like proportional-derivative or proportional-integral-derivativern(PID) cannot satisfactorily meet the performance characteristics in thernwhole seeker feld-of-regard. Nonlinear control methods, such Sliding-rnMode Control (SMC), may introduce enhanced capabilities to deal withrnsystem uncertainties and disturbances. In this paper, a comparison be-rntween the conventional PID and SMC design methods is addressed. Thernresulting controllers are compared using numerical simulation and labo-rnratory tests. The comparison clearly demonstrated the advantage of thernnonlinear SMC methods in meeting system performance characteristics,rngiven system uncertainty and disturbances.