外部硬时钟在半实物仿真中的应用

Application of External Hardware Clock in Hardware in the Loop Simulation

为保证高动态运动下的仿真可信度以及三轴转台、高精度惯导等仿真设备的安全,通常对于半实物仿真系统具有严格的实时性要求。提出一种以Windows+RTX实时系统平台为基础,使用外部硬件时钟产生定时信号的定时方案。使系统运行周期定时任务时具有良好的时钟定时精度。大量测试对比结果表明,在系统高负荷运行时外部硬时钟定时的方法比使用软时钟定时的方法体现出了更高的稳定度与定时精度。在分布式实时仿真系统中该方法具有重要工程应用价值。

The simulation system running under realtime is always required to ensure the credence of experiment as well as the safety of three axis turntable or the high precision inertial navigation devices. A timing method using external hardware clock based on Windows ＋ RTX realtime system platform is used to make the system with high timing accuracy when running periodic timing target. Test results show that the timing method of using external hardware clock provides better accuracy and higher stability than using software clock. The hardware clock may have great engineering application value especially for distributed realtime simulation system.