Title of the article

TECHNIQUE OF STRUCTURAL SYNTHESIS OF STATICALLY DETERMINABLE PARALLEL STRUCTURE MECHANISMS OF TECHNOLOGICAL ROBOTS

Authors

TOLSTOSHEEV Andrey K., Ph. D. in Eng., Assoc. Prof., Associate Professor of the Department “Machine Parts”, Bryansk State Technical University, Bryansk, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

TATARINTSEV Vyacheslav A., Ph. D. in Eng., Assoc. Prof., Associate Professor of the Department “Machine Parts”, Bryansk State Technical University, Bryansk, This email address is being protected from spambots. You need JavaScript enabled to view it.">Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2019 Issue 1 Pages 37–42
Type of article RAR Index UDK 621.865.8:621.01 Index BBK  
Abstract

The article is devoted to improving the reliability and manufacturability of technological robots with parallel kinematics by replacing statically indeterminable manipulators with statically determinable mechanisms. The  technique of  structural synthesis of statically definable manipulators by modifying the structure of the prototype is proposed. The  procedure involves identifying and eliminating redundant links, checking the solution. To determine the number of degrees of freedom of the mechanism, identify redundant links and verify the solution, the authors use the proposed methodology of structural analysis. In structural analysis, a manipulator is represented by a  hierarchical structure and is considered as a parallel connection of elementary mechanisms with an open kinematic chain; as a kinematic chain consisting of leading and driven parts; as a set of links and kinematic pairs; as a kinematic connection of  the output link and the rack. The article implements the following techniques for eliminating redundant links: mobility increase in kinematic pairs; introduction of unloading links and passive kinematic pairs to the kinematic chain; exclusion of extra links and pairs from the kinematic chain; increase in mobility in some kinematic pairs simultaneously with the exclusion of other kinematic pairs that have become superfluous. The authors developed several variants of  structural schemes of self-aligning manipulators based on the Orthoglide mechanism. The  proposed technique allows to  determine the number of degrees of freedom of the mechanism, the number and type of redundant links, eliminate redundant links and, on an alternative basis, build structural diagrams of statically determinable mechanisms of technological robots with parallel kinematics.

Keywords

technological robots, parallel kinematics, redundant links, statically definable mechanisms

   
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