Non-Uniform Motion by Mechanical Means

In this paper a methodology for designing mechanical non-uniform motion generators is presented. The basic requirements for four-bar and six-bar linkages are established and it is shown how the performance can be evaluated by harmonic analysis applied to the output angular velocity function. A means...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part B, Journal of engineering manufacture Journal of engineering manufacture, 1995-08, Vol.209 (4), p.295-303
Main Author: McGarva, J R
Format: Article
Language:English
Subjects:
Applied sciences
Drives
Exact sciences and technology
Linkage mechanisms, cams
Mechanical engineering. Machine design
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Summary:In this paper a methodology for designing mechanical non-uniform motion generators is presented. The basic requirements for four-bar and six-bar linkages are established and it is shown how the performance can be evaluated by harmonic analysis applied to the output angular velocity function. A means of creating and searching a library of mechanisms based on normalized output functions is presented. B-spline curves are used as a means of defining a desired performance and it is shown how minimum acceleration can be achieved with continuity in the derivatives. Finally, a means of increasing the quality of motion transmission in the selected mechanisms is given. The techniques are used to synthesize a six-bar linkage.
ISSN:0954-4054
2041-2975
DOI:10.1243/PIME_PROC_1995_209_086_02