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Development And Verification Of A New Method For Measuring The Stiffness And Damping Properties Of Joints In Parallel Kinematic Structures
Kolouch, Martin ; Tomáš, Jiří (referee) ; Knoflíček, Radek (advisor)
In this dissertation is presented the development of a new measurement method for the stiffness and damping characteristics of a joint in a parallel kinematic machine tool. The main contribution of this method is specially for applications, that demand accurate information about stiffness and damping parameters from assembled parts of machines tool. Methods for compensation of deformations in machines tool, that are carried out by control, belong to these applications. Another contribution of this work is the technical implementation of the proposed principle of the new method. At this point the focus of the work was devoted to signal processing, that differs in a certain degree from other types of signal processing methods, that are used in other dynamic measurements, e.g. modal analysis. One of the main requirements was the possibility to consider the nonlinear behavior of the measured structure. In another chapter the modified signal processing method was used for measuring a joint in a test rig. The results were compared with results from other measurement methods. On account of this comparison the statement was made that the new method can be used for measuring the stiffness and damping parameters of machine parts. Finally the new method was applied to measure the properties of a joint, which was built in a machine tool. Moreover, the problems, that appeared during the measurement, were also described.
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Comparison and analysis of the SIMO and MIMO methodology in the experimental modal analysis
Manga, Martin ; Kolouch, Martin (referee) ; Blecha, Petr (advisor)
Tato práce srovnává dvě dnes běžné varianty experimentální modální analýzy, a sice SIMO a MIMO analýzu. Pro provedení MIMO analýzy bylo nutné navrhnout nový postup měření, který je v práci podrobně popsán. Jak SIMO tak MIMO analýza byly provedeny za stejných podmínek, aby je bylo možno objektivně srovnat. Výsledky ukazují, že volba takzvaných referenčních bodů je pro věrohodnost výsledků zcela zásadní. Při dodržení všech zásad měření a vhodné volbě parametrů poskytuje MIMO analýza lepší výsledky.
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Development And Verification Of A New Method For Measuring The Stiffness And Damping Properties Of Joints In Parallel Kinematic Structures
Kolouch, Martin ; Tomáš, Jiří (referee) ; Knoflíček, Radek (advisor)
In this dissertation is presented the development of a new measurement method for the stiffness and damping characteristics of a joint in a parallel kinematic machine tool. The main contribution of this method is specially for applications, that demand accurate information about stiffness and damping parameters from assembled parts of machines tool. Methods for compensation of deformations in machines tool, that are carried out by control, belong to these applications. Another contribution of this work is the technical implementation of the proposed principle of the new method. At this point the focus of the work was devoted to signal processing, that differs in a certain degree from other types of signal processing methods, that are used in other dynamic measurements, e.g. modal analysis. One of the main requirements was the possibility to consider the nonlinear behavior of the measured structure. In another chapter the modified signal processing method was used for measuring a joint in a test rig. The results were compared with results from other measurement methods. On account of this comparison the statement was made that the new method can be used for measuring the stiffness and damping parameters of machine parts. Finally the new method was applied to measure the properties of a joint, which was built in a machine tool. Moreover, the problems, that appeared during the measurement, were also described.
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Comparison and analysis of the SIMO and MIMO methodology in the experimental modal analysis
Manga, Martin ; Kolouch, Martin (referee) ; Blecha, Petr (advisor)
Tato práce srovnává dve dnes bežné varianty experimentální modální analýzy, a sice SIMO a MIMO analýzu. Pro provedení MIMO analýzy bylo nutné navrhnout nový postup merení, který je v práci podrobne popsán. Jak SIMO tak MIMO analýza byly provedeny za stejných podmínek, aby je bylo možno objektivne srovnat. Výsledky ukazují, že volba takzvaných referencních bodu je pro verohodnost výsledku zcela zásadní. Pri dodržení všech zásad merení a vhodné volbe parametru poskytuje MIMO analýza lepší výsledky.
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Comparison and analysis of the SIMO and MIMO methodology in the experimental modal analysis
Manga, Martin ; Kolouch, Martin (referee) ; Blecha, Petr (advisor)
Tato práce srovnává dvě dnes běžné varianty experimentální modální analýzy, a sice SIMO a MIMO analýzu. Pro provedení MIMO analýzy bylo nutné navrhnout nový postup měření, který je v práci podrobně popsán. Jak SIMO tak MIMO analýza byly provedeny za stejných podmínek, aby je bylo možno objektivně srovnat. Výsledky ukazují, že volba takzvaných referenčních bodů je pro věrohodnost výsledků zcela zásadní. Při dodržení všech zásad měření a vhodné volbě parametrů poskytuje MIMO analýza lepší výsledky.
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