Balancing planar linkage mechanisms
This thesis concerns the synthesis of counterweights for balancing the forces, moments and driving torque generated by planar linkage mechanisms. Part I reports the development of theory and an associated procedure by which multi-link, multi-degree-of-freedom planar linkage mechanisms may be fully f...
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ndltd-bl.uk-oai-ethos.bl.uk-4762992015-03-19T03:41:53ZBalancing planar linkage mechanismsWalker, Michael John1979This thesis concerns the synthesis of counterweights for balancing the forces, moments and driving torque generated by planar linkage mechanisms. Part I reports the development of theory and an associated procedure by which multi-link, multi-degree-of-freedom planar linkage mechanisms may be fully force-balanced without reference to the kinematic equations of motion. The procedure includes rules to determine whether a particular linkage may be fully force-balanced, and if so how many counterweights are needed, together with a means of selecting an appropriate counterweight set. Part II reports the development and use of a general computer-based approach to synthesizing counterweights by means of numerical minimization. The illustrative computer program described can be used to improve the unbalanced forces, moment and/or driving torque of two types of planar linkages, a four-bar linkage and a particular Watt's six-bar chain. Quantitative criteria for evaluating the improvements are considered in some detail. The worth of the two approaches is examined theoretically and experimentally in the case of a particular Watt's six-bar chain. Part III contains the overall discussions on and conclusions to the work of this thesis, along with suggestions for further work.621University of Newcastle Upon Tynehttp://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.476299http://hdl.handle.net/10443/836Electronic Thesis or Dissertation |
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621 Walker, Michael John Balancing planar linkage mechanisms |
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This thesis concerns the synthesis of counterweights for balancing the forces, moments and driving torque generated by planar linkage mechanisms. Part I reports the development of theory and an associated procedure by which multi-link, multi-degree-of-freedom planar linkage mechanisms may be fully force-balanced without reference to the kinematic equations of motion. The procedure includes rules to determine whether a particular linkage may be fully force-balanced, and if so how many counterweights are needed, together with a means of selecting an appropriate counterweight set. Part II reports the development and use of a general computer-based approach to synthesizing counterweights by means of numerical minimization. The illustrative computer program described can be used to improve the unbalanced forces, moment and/or driving torque of two types of planar linkages, a four-bar linkage and a particular Watt's six-bar chain. Quantitative criteria for evaluating the improvements are considered in some detail. The worth of the two approaches is examined theoretically and experimentally in the case of a particular Watt's six-bar chain. Part III contains the overall discussions on and conclusions to the work of this thesis, along with suggestions for further work. |
author |
Walker, Michael John |
author_facet |
Walker, Michael John |
author_sort |
Walker, Michael John |
title |
Balancing planar linkage mechanisms |
title_short |
Balancing planar linkage mechanisms |
title_full |
Balancing planar linkage mechanisms |
title_fullStr |
Balancing planar linkage mechanisms |
title_full_unstemmed |
Balancing planar linkage mechanisms |
title_sort |
balancing planar linkage mechanisms |
publisher |
University of Newcastle Upon Tyne |
publishDate |
1979 |
url |
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.476299 |
work_keys_str_mv |
AT walkermichaeljohn balancingplanarlinkagemechanisms |
_version_ |
1716734279784857600 |