Realization of a virtual lambda sensor on a fixed precision system

The paper studies the implementation feasibility of a VLS (virtual lambda sensor) by a TSK (Takagi, Sugeno, Kang) singleton FIS (fuzzy inference system). Such a sensor could be used in a model based EMS (engine management system) for trade gasoline engines. The FIS design target is to obtain a system with a fixed data representation (i.e., 10 bit) and a limited number of inputs, outputs, rules and membership.