The flight subsystems of aerospace vehicle must be introduced in Hardware In Loop Simulation (HILS) testbed prior to actual field tests to evaluate their performance in real-time scenario. This helps greatly in the design and development of vehicle subsystems. The HILS results are suffering due to unwanted diverging oscillations, which limit the HILS testbed effectiveness in evaluating the actual performance of embedded systems of Aerospace vehicle. It is found that the oscillations are due to the time delay introduced in HILS testbed. In this paper different delay compensation methods were highlighted. The Non Real Time simulation (NRT) testbed was developed and modeling of the delay effect is done by simulating the diverging oscillations. A suitable compensation method is also implemented in NRT simulation. The same compensation method was implemented in actual real-time HILS also to see its effectiveness.

航天飞行器的飞行子系统必须在实际现场测试之前引入硬件在环仿真（HILS）试验台，以评估其在实时场景中的性能。这极大地有助于车辆子系统的设计和开发。由于不需要的发散振荡，HILS 结果受到影响，这限制了 HILS 测试台在评估航空航天飞行器嵌入式系统的实际性能方面的有效性。发现振荡是由于 HILS 试验台中引入的时间延迟造成的。本文重点介绍了不同的延迟补偿方法。开发了非实时模拟 (NRT) 测试平台，并通过模拟发散振荡来完成延迟效应的建模。在 NRT 模拟中也实施了一种合适的补偿方法。