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Synchronous generators have a natural different time scale dynamics. That is why, for modelling and control design in such systems, the methods of singular perturbations are widely used. In this paper the possibilities of sliding mode control design for synchronous generators are analysed. With this aim the concept of singular perturbation is revised in order to use it for relay control systems. The obtained results are used for sliding mode control of synchronous generator. [ABSTRACT FROM AUTHOR]

Of the basic tasks that the Soviet school, and every teacher in it, faces at the present time, none is more important-nor, for that matter, more complex-than that of shaping in pupils a positive and stable motivation toward learning activity, a motivation that will stimulate them to persevering and systematic performance in school. It is, after all, obvious that in the absence of such motivation, pupil activity in the teaching and learning process will be ineffectual. [ABSTRACT FROM AUTHOR]

This work will familiarize the teacher with contemporary Soviet psychology's progress to date in the study and shaping of the motivation to learn. [1] [ABSTRACT FROM AUTHOR]

This article reviews current developments in Soviet mathematical psychology and relates them to the very extensive extant literature in the United States. Programmatic articles of this kind are frequent in Soviet journals. They serve the dual purpose of highlighting current areas of concern and pointing to probable future areas of growth. Mathematics in large doses is now a standard part of the Soviet psychologist's education, and can be counted on to be an important feature of future psychological research. [ABSTRACT FROM AUTHOR]