Naslov
Optimised cross-spring pivot configurations with minimised parasitic shifts and stiffness variations investigated via nonlinear FEA

Autori
Marković, Kristina ; Zelenika, Saša

Izvornik
Mechanics based design of structures and machines (1539-7734) 45 (2017), 3; 380-394

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Compliant mechanisms ; cross-spring pivot ; high-precision positioning ; nonlinear FEA modelling ; optimised design configurations

Sažetak
Compliant mechanisms are nowadays a well- established means of achieving ultra-high precision, albeit at the expense of complex kinematics with the presence of parasitic motions. Diverse design configurations of compliant rotational joints called cross-spring pivots are hence studied in this work by applying various analytical and numerical approaches. Depending on the required precision and loading conditions, the limits of applicability of the available analysis tools, validated with nonlinear finite element calculations tuned with experimental data reported in literature, are established. The variation of design parameters allows, in turn, establishing design configurations of the studied mechanism that allow attaining minimised parasitic shifts and slight variations of its rotational stiffness, even when a broad range of rotations and varying transversal loads are considered, creating thus the preconditions for their application in high- precision micropositioning applications.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti, Interdisciplinarne tehničke znanosti

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