Estimation of Clock Drift in HiL Testing by Property-Based Conformance Check

Hardware-in-the-loop testing (HiL) requires exact timing of measurements of continuous signals. Although great effort is put into design and manufacturing of measurement devices, inaccuracies might occur. In industrial practice differently fast clocks can occur and lead to drifting sampling rates. This drift leads to stretched and distorted signal data. Based on a methodology for analysing test data of continuous systems, we suggest to estimate the drift in HiL measurements with a property-based approach. Data of a reference device and the device exhibiting the drift is compared with help of signal properties. The shifted occurrences of one property depends on the clock´s drift.