针对机载IRST系统具有大视场、高空间分辨率、高扫描速度的3项技术指标特点, 设计了一种单元化结构的新型IRST仿真测试平台, 解决了传统仿真系统无法同时满足该3项技术指标要求的难题。仿真测试平台由仿真中心、激励器、仿真器和显控终端共4个单元构成, 具有5种工作方式。激励器采用基于时间序列的面阵场景发生方法, 将大视场、高分辨率的仿真场景分割成序列化小视场、标准分辨率的面阵场景; 采用光纤网络将面阵场景的视频信号和时序信息同时发送到仿真器, 仿真器根据工作方式采用不同的处理方法对视频信号进行处理。测试结果表明, 仿真测试平台能够仿真真实机载IRST系统的综合性能、工作方式和接口方式, 现已经应用于航电任务软件的联试和航电系统的性能测试。

A new unitized simulation testing platform is designed according to the characteristics of three technical indicators for the airborne Infrared Search and Tracking (IRST) system,which are large field of view,high spatial resolution and high scanning speed.The problem that the traditional simulation system cannot simultaneously meet the requirements of the three technical indicators is effectively solved.The simulation testing platform has five working modes and consists of four subsystems:a simulation center,an actuator,an emulator,and a display and control terminal.The actuator uses the scene generation method based on time sequence to segment the simulation scene with large field of view and high resolution into several sequence-based planar array simulation scenes with small field of view and standard resolution.The video signal and time sequence information of the planar array simulation scenes are sent to the emulator simultaneously by using the fiber network.The emulator adopts different processing algorithms to process the simulation video signal according to the working mode.The performance test results show that the platform can simulate the comprehensive performance,working modes and interface modes of the real airborne IRST system.It has been applied to the joint test of the avionic mission software and the performance test of the avionic system.