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1
Content available Zastosowanie elementów logiki rozmytej do oceny układów elektromaszynowych
Horodecki A.
Maszyny Elektryczne : zeszyty problemowe
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2006
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Nr 75
133-135
EN
Owing to a great variety of industrial electro-machine systems, it becomes more and more crucial to assess correctly electro-machine systems offered by their suppliers. It has been proved in this paper that by assessing systems offered to them exclusively on the basis of bivalent rules, purchasers are likely to incur economical losses. It is essential to apply elements of fuzzy (or multivalent) logics while performing such on assessment. With this purpose the notion of Hamming distance, applied in the theory of mathematical sets has been used in the easiest possible way. The Hamming distance, which defines an agreed distance between two sets of certain quantities, turned out to be useful for proposing a way of assessment of offered electro-machine systems. Considering same characteristics of electro-machine systems as quantities included in sets defined by a Hamming distance a theoretical basis of such an assessment can be obtained. The paper presents a simple and interesting geometric interpretation of the abovementioned solutions. It also reveals a method of assessment and reciprocal comparison of offered electro-machine systems.
2
Content available Pewne szczególne sposoby wyboru optymalnych pod względem technicznym i ekonomicznym układów elektromaszynowych
Horodecki A.
Maszyny Elektryczne : zeszyty problemowe
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2005
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Nr 72
273-275
EN
The report presents the procedures of the choice of an electromechanical systems optimum based on its econominal mathematical. First procedure presents the relation between joint outlays which are to be destined for a given systems variant and outlays both for its purchase and its operation costs. It is variant choice in the case when outlay category is substituted for another. In other words this economical and mathematical model relates the joint outlays with the type and power of electric driving motor, the characteristic of the working machine driven by this motor, the characteristic of the working machine driven by this motor, the time of operation, etc... The report present also criterions for choosing a systems variant by means of the point method. This point method of assessing electromechanical drive systems properties allows us to include both of the measurable and nonmeasurable features of the systems investigated into one joint calculus. The possibility to describe different values of the intensity of properties of systems did draw the author attention to minimax method based upon Wald' s matrix. This method consist in finding the maximum and minimum value of function of many variables in a certain set of events (searching of the saddle point). In some case the determination of the optimum variant is possible by means mathematical regret minimax method. Mathematical regret method propose the choice of such a possible action that the level of regret for not choosing a best variant should be the smallest. The auxiliary methods can be used simultaneously with other ways of choosing.
3
Content available Możliwość zastosowania zmiennych lingwistycznych w diagnostyce układów elektromaszynowych
Horodecki A.
Maszyny Elektryczne : zeszyty problemowe
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2005
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Nr 72
277-280
EN
To assess an diagnostic system for electromechanical system and choose its best variant requires formulate of criterion determination. This process consists of formulating the criterion function and then finding critical variable values. Technological, economical and, sometimes, praxeologic criterions are presents in this report. Basing on the consideration should be applied when data used for calculation are multivalent (fuzzy) nature. The idea of linguistic variables is identified with the idea of linguistic terms. This means: -an appropriate of number of linguistic variables shall be determined, - a value of the membership function is subordinated to each linguistic variable. The set of linguistic variables describing the diagnostic state of electromechanical systems is admitted depending of the origin if its components: good - medium - bad. The upper number of linguistic variables should be suggested. In practice distinct limits exist. These limits may be set by the perceptive capacity of person responsible for the assessment of system. This number of linguistic variables applied in the diagnostic of a electromechanical system is determined at three (good -medium - bad), maximum at five (good - mediocre - medium - weak - bad). The thus suggested number of linguistic variables may be applied rather easily for arriving at multivalent logics. However, the rules of bivalent logics impell the choice of only two state: good - bad.
4
Content available remote Wybór optymalnej struktury napędu elektrycznego
Kolano J., Horodecki A., Ali Z.
Maszyny Elektryczne : zeszyty problemowe
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1999
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Nr 58
47-48
5
Content available remote Propozycja metody wyboru elektrycznego układu napędowego uwzględniającej jego parametry techniczne i ekonomiczne
Horodecki A., Niechaj M., Abdul Z. A.
Maszyny Elektryczne : zeszyty problemowe
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1998
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Nr 55
45-48
PL
W opracowaniu omówiono rozwój metod wyboru optymalnych (dla zadanych kryteriów) układów napędu elektrycznego. Wskazano na dwie duże ich grupy: metody oparte o reguły logiki dwuwartościowej oraz metody oparte o reguły logiki wielowartościowej
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