Transmission and Conversion of Energy by Coupled Soft Gears

TL;DR

This study compares the energy transmission and conversion capabilities of coupled soft and hard gears, revealing that soft gears can transmit energy in configurations where hard gears cannot, and that thermal noise influences gear rotation directions.

Contribution

It demonstrates how soft deformable gears enable energy transmission and conversion in configurations where hard gears fail, highlighting the role of material softness and thermal noise.

Findings

Soft gears transmit energy only in specific configurations.

Thermal noise affects the direction of gear rotations.

Soft gear systems exhibit unique energy conversion properties.

Abstract

Dynamical aspects of coupled deformable gears are investigated to clarify the differences of mechanical properties between the machines consist of hard materials and those of soft materials. In particular, the performances of two functions, the transmission and the conversion of the energy, are compared between the hard and soft gears systems. First, the responses of the coupled gears against a constant torque working on one of gears are focused for two types of couplings; P) a pair gears are coupled, and T) three gears are coupled with forming a regular triangle. In systems with the coupling P), we obtain trivial results that the rotational energy can be transmitted to other gear only if these gears are hard enough. On the other hand, in systems with the coupling T), the transmission of the rotational energy to one of the other gears appears only if these gears are soft enough. Second, we show the responses of this system in which one of gears have contact with a high temperature heat bath and the other gears have contact with a 0 temperature heat bath. With the coupling T), the directional rotations appear in two gears having contact with 0 temperature heat bath. Here, the direction of these rotations change depending on the noise strength.