Analytical Stiffness Optimization of High-Precision Hexapods for Large Optical Telescope Applications

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Sammanfattning

An analytical stiffness and eigenfrequency model of symmetric parallel 6-6 Stewart
platforms (hexapods) is developed based on geometrical design variables to optimize the
dynamical performance. The model is based upon Lagrangean dynamics in which the Bryant
angles are used for the kinematics formulation. With the analytical eigenfrequency model,
optimum stiffness characteristics can be obtained for any industrial application with limited
workspace such as optical collimation systems. The actuator length-flexibility dependency is
also considered in the analytical model. It is proposed that to increase the actuation bandwidth
in six degrees of freedom, an eigenfrequency cost function can be defined and optimized.
Originalspråkengelska
Titel på värdpublikationProceedings of the 25th Nordic seminar on computational mechanics
RedaktörerK. Persson, G. Sandberg, M. Wallin
StatusPublished - 2012
Externt publiceradJa
Evenemang25th Nordic Seminar on Computational Mechanics, 2012 - Lund, Lund, Sverige
Varaktighet: 2012 okt. 252012 okt. 26
Konferensnummer: 25

Konferens

Konferens25th Nordic Seminar on Computational Mechanics, 2012
Förkortad titelNSCM
Land/TerritoriumSverige
OrtLund
Period2012/10/252012/10/26

Ämnesklassifikation (UKÄ)

  • Teknisk mekanik

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