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Dynamics Modeling of Gear Transmissions with Asymmetric Load-Dependent Friction

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posted on 2022-05-25, 22:00 authored by Ryo KikuuweRyo Kikuuwe

This paper proposes a new concise mathematical model of gear transmission dynamics with asymmetric load-dependent friction. It is of the form of a differential-algebraic inclusion (DAI) characterized by some parameters, including input-side and output-side asymmetry coefficients. The presented model properly captures the static friction and even the non-backdrivability. It is applicable to different classes of transmissions, such as leadscrew transmissions, worm gear transmissions, and spur gear transmissions. The DAI representation is extended into a multi-dimensional representation for articulated rigid-body systems driven through joint transmissions. Moreover, simulation algorithms are derived through the implicit Euler discretization. Some simulation examples illustrate the capability of the presented simulation algorithm to reproduce load-dependent asymmetric frictional behaviors, which cannot be reproduced by conventional load-independent joint friction models.


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Hiroshima University

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