The design of electro-hydraulic servomechanisms characterized by high precision requirements generally needs adequate knowledge of its characteristics, and, in particular, of nonlinear phenomena. Among these, Coulomb's frictional forces acting on the mechanical elements in relative motion are critical to guarantee an implementation capable of respecting the accuracy requirements. The correct evaluation of this phenomenon allows understanding the behaviour of the physical system considered, to estimate its performance by implementing it in a simulation environment, and to design new devices taking into account the relative constraints. Accurate modelling and simulation of the considered system generally imply the use of high order dynamic models (typically, of second-order nonlinear or higher). However, under certain conditions, it is possible (and advisable) to simplify the mathematical structure of the numerical model, degrading it to a simple first-order, reducing its complexity and computational cost and, nevertheless, still obtaining results comparable with higher-order models. In this paper, the authors propose a new computational model capable of being implemented within these degraded numerical models, allowing them to simulate the main effects due to dry frictions (Coulomb's model). This first-order dynamic model is compared with the corresponding second-order ones to evaluate their performances in different scenarios.
Proposal of a new simplified coulomb friction model applied to electrohydraulic servomechanisms / Dalla Vedova, M. D. L.; Di Fiore, F.. - In: INTERNATIONAL JOURNAL OF MECHANICS AND CONTROL. - ISSN 1590-8844. - ELETTRONICO. - 21:1(2020), pp. 179-188.
|Titolo:||Proposal of a new simplified coulomb friction model applied to electrohydraulic servomechanisms|
|Data di pubblicazione:||2020|
|Appare nelle tipologie:||1.1 Articolo in rivista|
File in questo prodotto:
|J21A_RI_12 Dalla Vedova PrePrint.pdf||Post-print draft||2. Post-print / Author's Accepted Manuscript||PUBBLICO - Tutti i diritti riservati||Visibile a tuttiVisualizza/Apri|
|J21A_RI_12 Dalla Vedova EditPostPrint.pdf||Paper - Final Version||2a Post-print versione editoriale / Version of Record||Non Pubblico - Accesso privato/ristretto||Administrator Richiedi una copia|