Diagnosis and control using multiple models. Application to a biological reactor

Process diagnosis is still considered a challenging engineering problem. Technological systems, and also environmental systems, have complex behaviours often involving non linear relationships. When confronted to such systems, there is a need to build systems which can operate over a wide range of operating conditions. For that, it is very attractive to appeal to a decomposition of the model of the system into a number of simpler linear models. This communication mainly focuses on the use of multiple models for process diagnosis and control. In both cases, it is shown how the traditional tools of the linear automatic can be wide and applied to the structures based on multiple models.