The Mechanical Efficiency of Epicyclic Gear Trains

Abstract

The analysis of mechanical efficiency constitutes an important phase in the design analysis of gear drives. The objective of this investigation has been the development of a general algorithm for the determination of efficiency in split-power spur-gear trains. The model includes meshing losses only; for a more realistic estimation other sources can be considered separately. The systematic nature of the formulation, based on the dual correspondence between the kinematic structure of the gear drive and a labelled graph, allows a ready coding of the efficiency analysis in a general computer program. The numerical results are in line with those given by other authors using different methodologies.

Modeling of Frictions in the Transmission Elements of a Robot Axis for Its Identification

“…This paper presents suggestions for modeling and the results obtained by using an approach based on the decomposition of the kinematic chain in independent elements and on the analysis of the mechanical power flow which goes through these elements. This approach was already carried out by other authors (Pennestri et al (1993), Abba et al (1999), Filipoiu et al (1996)), the characteristic of our work lies in its application to "Harmonic Drive" gearboxes.…”

On Crossley's contribution to the development of graph based algorithms for the analysis of mechanisms and gear trains

“…Also mechanical efficiency analysis of planetary gear trains benefited of the correspondence graph-mechanisms introduced by Crossley (e.g. [111]). Table 2 summarizes, grouped by years, graph based contributions to different areas of planetary gear trains.…”

Teaching Planetary Gear Trains with the Aid of Nomographs

“…To compare the results of this methodology with others [10,[13][14][15][23][24][25], algebraic expressions for the torque relations can be written as follows.…”

“…Pennestri and Freudenstein [14,24] use the same fundamental circuits proposed earlier [13] for a complete static force analysis [23]. ey apply a similar formulation in conjunction with their earlier kinematic study [2] to determine the most efficient kinematic con�guration.…”

“…e studies on power �ow analysis of EGMs are mostly done in the context of efficiency formulations [14,23,24]. Pennestri and Freudenstein [14,24] use the same fundamental circuits proposed earlier [13] for a complete static force analysis [23].…”