Abstract:On the basis of the characteristics and mechanism of radio frequency/infrared(RF/IR) composite guidance, the hardware in the loop simulation test system of RF/IRcomposite seeker is studied. The schemes of “sub aperture” and “common aperture” testsystems are analyzed and compared. The overall design of “common aperture” simulationtest system is studied. The key technologies are analyzed, and the specific solutions aregiven,such as the design and installation of beam combiner, the high-speed real-timesimulation of dual-mode composite seeker and the integration of composite target simulationsystem.