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Synthesis of mechanical systems including passive or active elements

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Author(s): K. Białas

Journal: Journal of Achievements in Materials and Manufacturing Engineering
ISSN 1734-8412

Volume: 26;
Issue: 1;
Start page: 18;
Date: 2008;
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Keywords: Process systems design | Polar graphs | Structural numbers | Synthesis

ABSTRACT
Purpose: In this paper there are presented basic methods of synthesis of mechanical systems including active and passive elements. The major aim of the research is to work out a method of structure and parameters searching i.e. structural and parametric synthesis of a discrete model of mechanical system on the base of desired requirements. The requirements pertain to dynamic features of the system, particularly its frequency spectrum. The purpose of this paper is also comparison of reduction of vibrations of mechanical systems by use the passive or active elements.Design/methodology/approach: In this article was used unclassical method of polar graphs and their relationship with the algebra of structural numbers. This method enables analysis without limitations depending on kind and number of elements of complex mechanical system using electronic calculation technique.Findings: Use of active elements into the elimination of vibration offers the possibility to overcome the limitations of the methods of passive elimination of vibration, such as, in particular, low efficiency in case of low-frequency vibration.Research limitations/implications: The scope of discussion is synthesis of passive and active mechanical systems, but for this type of systems, such approach is sufficient.Practical implications: The results represented this work in form of polar graphs extend the tasks of synthesis to other spheres of science e.g. electric systems. The practical realization of the reverse task of dynamics introduced in this work can find uses in designing of machines with active and passive elements with the required frequency spectrum.Originality/value: Thank to use an unclassic method of polar graphs and their relationship with the algebra of structural numbers, can be possible correcting systems as early as during the designing of future functions of the system as well as during the construction of the system.
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