The essential benefit of Hardware-in-the-loop (HWIL) simulation can be summarized as that the performance of missile guidance/control system is evaluated realistically without the modeling error by using actual hardware such as seeker systems, autopilot systems and servo equipments. HWIL simulation, however, requires very expensive facilities: in these facilities, target model generators are indispensable subsystems. In this paper, a target model generator for RF/IR seeker systems is introduced, and then, two technical problems with this facility are discussed: a method to overcome the line-of-sight(LOS) angle limitation and the RF/IR dual mode seeker simulation technique.
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