Semi-intrusive multivariable model invalidation. (Q1410377)

This paper gives a technique for testing multivariable models employed by model-based controllers. The data collection includes a stage where the controller is switched to open-loop operation (manual mode). The main idea is to measure a certain distance between the closed-loop and the open-loop signals and then trigger a flag if this distance is larger than a threshold level. A provision is made for accommodating model uncertainty. The model invalidation works in a probabilistic framework. A simulation example is given.