Abstract

Ravigneaux gears are planetary gears, often used in automatic power transmission systems. They represent an integration of two planetary gears, where the two planet carriers are combined, and one ring gear is omitted. They possess a complicated mesh structure and are a source of parameter-excited vibrations in the interior of an automatic transmission. In order to model the dynamics of such a gear correctly, the dynamics of the complete transmission and, additionally, at least the approximate dynamics of the complete driveline system, must be considered.

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