Causes & Effects of delay in HILS of Aerospace systems

Complex embedded systems can be developed and evaluated using a testing technique which is used increasingly known as Hardware In Loop Simulation (HILS). HIL simulation provides an effective platform for real time embedded systems development and testing. The seeker based target acquisition and guidance system is also included in the HILS test bed for its evaluation of real time dynamic performance. The Flight Motion Simulator (FMS) is used to simulate the angular rates excitation to subsystems like seeker and sensors which are mounted on it. All the systems in the HILS test bed creates a considerable delay during simulation runs. This delay leads to divergence in the HILS results. This paper describes the study of causes for the delay in HILS test bed and the effect of this delay in HILS results.