Opto-electronic tracking system has developed rapidly and has been used widely in the military area and civil area such as missile seeker

airborne opto-electronic(O-E) reconnaissance

optical measuring equipment in shooting range etc. Considering the measurement time-delay and plant model uncertainty

a robust internal model control(IMC) strategy is designed for the opto-electronic tracking system. Equations for designing the IMC controller from gain and phase margin specifications are derived in detail. The robust stability condition under plant/model mismatch is derived. The optimization method based on quadratic cost function is introduced to adjust online controller parameter. Experimental result that the tracking precision is less than 1 mil

show that the proposed design method is effective to overcome tracking error causing by measurement time-delay of imaging tracker.