Theory elements of zero negative-feedback in adaptive friction clutches

A supplementary friction group in the clutch design increases its load capacity. It is a decided advantage of adaptive friction clutches of the second generation with combined feedback. The feedback gain changes depending on the friction coefficient value. The problem of establishing such patterns, and the synthesis of the command unit elementary diagram with its parametrization based on this concept, is solved in the paper. The identified regularity allows stating the following. Under zero thrust force and minimum friction coefficient value, changing the gain level does not exceed its limit value. It provides an automatic control with a theoretical “ideal” load characteristic of the clutch. A curve geometric form outlining the side wall of the rolling body socket of the command unit, and providing an automatic control in the adaptive friction clutch, is found. In this case, the goal is to obtain a theoretically “ideal” load characteristic of the coupling.