Abstract
We review fuzzy-control principles and show a simulation program permitting convenien t generation of membership functions and simple output interpolation. Interactive simulation is more than ordinarily important for economical fuzzy- controller design, which must reduce the number of membership classes and input/ output rules as much as possible. We use a personal computer and interactive editing to compare linear and fuzzy servo controllers. With 50 per cent class-membership overlap ("pseudo dither"), our fuzzy logic produces linear interpolation, and thus completely unimpaired servo performance even if we use only 2 fuzzy sets ("positive" and negative") each for error and output rate.
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