The interactions in the systems H 2 O3Am3SO 2 (Am is formamide, dimethylformamide, acetamide, urea, tetramethylurea, tert-butylurea) at 278 and 293 K were studied pH-metrically. The results suggest formation of intermolecular and ion3molecule associates. The composition and stability of the compounds formed strongly depend on the structure and concentration of the solution components and on temperature.The possible reactions of SO 2 with compounds of various classes are very diverse, and studies of the behavior of SO 2 in aqueous solutions are of not only theoretical but also practical importance [1].
The study objective is to determine the conditions for ensuring high reliability of adaptive friction clutches with positive feedback, theoretically providing full stabilization of the clutch break torque.
The problem to which the paper is devoted is the presentation of the substantive aspects of various stages of studying the principle of indirect control used in clutches and the definition of parameters of an additional control device that ensure full stabilization of the clutch break torque.
Research methods. The developed and previously applied theoretical fundamentals of full stabilization of the adaptive friction clutch break torque allowed to create a knowledge base in the form of particular mathematical models that locally describe the process of automatic control in the object under study. Based on the analysis of the applied mathematical modeling method, the principal possibility of using positive feedback in clutches to ensure their high reliability is defined.
The novelty of the work. Ensuring high stabilization of the break torque is possible due to the use of a constant gear ratio of the transmission mechanism of the control device and a variable value of the feedback gain.
The results of the study. The use of positive feedback with indirect control theoretically allows to ensure high reliability of the overload clutch of the third generation.
Conclusions: in order to realize the high reliability of adaptive friction clutches of the third generation, it is necessary to ensure the found functional connections between the downforce, the feedback gain and the gear ratio of the transmission mechanism.
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