Abstract: Efficient expert systems for failure diagnosis often decisively increase the availability of a technical system by making available to a layman the knowledge of a diagnostic expert. The process attains the following objects: For each variant of a technical system, which is composed of modules, a knowledge base should be efficiently generated. An expert system should be able to quickly diagnose each variant. The process provides the following: In knowledge acquisition, knowledge modules are generated, namely a knowledge module for each type of real module, which occurs in at least one variant of the technical system. The knowledge module contains all diagnosis-relevant knowledge about the real module type in such a way that it is valid for each exemplar of the type.

Abstract: A method for generating an output for a fuzzy controller by evaluating a set of linguistic rules. For each input signal, a linguistic hedge is formed to be a fuzzy information system. Each linguistic rule is also formed with a premise consisting of a multitude of linguistic statements about pairwise different input signals, linked by AND, or consisting of one statement about one input signal, and a conclusion consisting of a linguistic statement about the output signal of the fuzzy controller. The set of rules is built such that it forms a complete and consistent set of linguistic rules.