Bohdan S. Butkiewicz

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In the paper fuzzy controllers with if ... then type of rules are considered. Each rule can contain linguistic values joint by sentence conjunctions " and " , " or ". Rules are jointed by word " also ". Different mathematical interpretations are used for " and " , " or " , " also " during approximate reasoning. Rules with same consequences can be aggregated(More)
We consider the problem of control error of a fuzzy system with feedback. The system consists of a plant, linear or nonlinear, fuzzy controller, and feedback loop. As controller we use both PD and PI fuzzy type controllers. We apply different t-norm and co-norm: logic, algebraic, Yager, Hamacher, bounded, drastic, etc. in the process of fuzzy reasoning.(More)
— This paper presents an entire scheme for the estimation of a sparse disparity map from stereo pair images. In contrary to a dense disparity map, for which disparity values are calculated for each pixel of image, the sparse disparity map is determined only for some distinguished set of pixels from an image. The pixels belong to this set are called(More)
Degradation processes, caused by the extreme values of current pulses or thermal burn-in, are studied in thermistors with negative temperature coecient of resistance. The drift of thermistor resistance at 25°C is observed. These changes depend on the value and the number of current pulses. The ®rst 100 cycles are the basic ones for the future exploitation(More)
The paper describes a version of n-copter, the vehicle known as quadcopter. It is an aircraft, a kind of helicopter, with four rotors. Mechanical and electrical construction is described in details. The model is steering by radio waves. Three fuzzy logic controllers are used for rotors, each for one axis and main controller for whole system. Dynamical(More)