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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

[en] STUDY OF KINEMATIC AND DYNAMIC CHARACTERISTICS OF A LARGE-SIZED CHARTPLOTTER / [pt] ESTUDO DAS CARACTERÍSTICAS CINEMÁTICAS E DINÂMICAS DE UMA TRAÇADORA DE GRANDE PORTE

SANDRA DE ALMIRANTE FRID 09 March 2018 (has links)
[pt] Este trabalho apresenta um estudo experimental do funcionamento do protótipo de uma traçadora gráfica de grande porte, desenvolvida no Departamento de Engenharia Mecânica da PUC-RJ. São detalhadas as características cinemáticas e dinâmicas do modelo de posicionamento adotado. As respostas de traçados são analisadas em função de diversas variáveis. É feito um estudo sobre rampa de aceleração e sua influência na qualidade do traçado. Finalmente, é apresentado um algoritmo, de traçamento de arcos de círculo, que permite maior versatilidade no seu funcionamento. / [en] An experimental study of the performance of a large scale plotter developed and built at the Mechanical Engineering Department of PUC-RJ is undertaken. After analysis of the kinematical solution, the study is concerned with the dynamical response of the pen positioning system. The need of acceleration ramps becomes clear and their influence on the drawing quality is compared for several time delays. Finally, an algorithm for drawing circles and arcs based on a look-up table is presented. This algorithm is suitable for reducing data transfer between the controlling computer and the plotter.

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