Effect of Coupling Point Selection on Distortion in Internet- distributed Hardware-in-the-Loop Simulation (PREPRINT)

摘要

Abstract-Internet-distributed hardware-in-the-loop (IDHIL) simulation integrates geographically-dispersed HIL setups and fosters concurrent systems testing early in the design process. The degree to which an ID-HIL simulation loses fidelity relative to the single-location alternative is referred to as distortion. The literature showed that various factors affect distortion, e.g., delay, jitter, and loss. This paper shows that the coupling points, i.e., the particular points at which the system model is divided to enable distribution across the Internet, also affect distortion. The aim is to turn coupling point selection into a design decision that can be used to minimize distortion. To quantify distortion, a frequency-domain metric is proposed using a linear systems framework. This metric is then used to analyze how the choice of the coupling point affects distortion, leading to guidelines for selecting a coupling point that gives minimal distortion. The theory is demonstrated on a quarter-car model.