The Multiobjective Optimization of Machine Tool Construction by a Global Computation in a Whole Workspace

Michael Valasek, Jan Zavrel, Zbynek Sika, Tomas Vampola


This paper deals with the application of newly developedmethods enabling multiobjective optimization of mechanicalstructures by global computations. The methods described in thispaper are applied to a real mechanism. It was chosen as thekinematical structure of TRIJOINT 900H. Simplified structurecompounds of two bodies connected together by a rotational joint.This structure is optimized in two design parameters, a length ofthe left body and a length of a right body. These parameters arechanged in the optimizing cycle and new bodies are generated.Stiffness and accessible acceleration are computed as a globalcriteria for every variant. A goal is to compute the Pareto set bygenetic algorithms and subsequently to choose the best varianton it. A Pareto set is displayed and a best solution is chosenfinally.


flexible bodies; mechanism; optimization; stiffness; modal properties

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ISSN 1801-1217 (Print)
ISSN 1805-9422 (Online)
Published by the Czech Technical University in Prague, Faculty of Mechanical Engineering