Optimization of mounting of a machine and its parts

• Autorzy: Vondrich J. , Havlicek R.
• Języki publikacji: EN

Abstrakty

EN

Frequency dependence values of input or mutual mechanical impedances of vibrating machines and their parts can be measured using an impedance hammer and a two-channel frequence analyzer. The knowledge of the frequency response of mechanical impedance provides for the determination of properties of vibration energy transmission in the structure of the machine based on which it is possible to adjust the mounting arrangement of the machine and its parts in order to attenuate vibrations. The obtained data concerning the dynamicbehaviour of the machine then serve as a basic for a proper design and implementation of elastic mounting of the machine and its parts on damping elements which attenuate unwanted vibrations to the minimum. The design consists in assembling a model of the machine assuming that elastic mounting has been provided for, describing the model using equations of montion and elaborating their numerical solution. An efficient damping arrangement is achieved by mounting the vibrating parts of the machine using air springs. The air pressure in the air springs can be regulated according to deflections of the individual machine parts measured by accelerometers using a control element. The numeric solution provides for determination of values of stiffness coefficients k and damping coefficient c which would be optimal for the specified machine parameters in order to minimise the defections of the individual machine parts.

Słowa kluczowe

EN

Matlab; Simulink; air spring; machine

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2008
• Tom: Vol. 8, No. 1
• Strony: 123--129
• Opis fizyczny: Bibliogr. 9 poz., tab., rys.

Twórcy

autor

Vondrich J.

• Czech Technical University in Prague, Faculty of Electrical Engineering, Dept. of Mechanic and Materials Science, Technická 2, 166 27 Prague 6, Czech Republic

autor

Havlicek R.

• Czech Technical University in Prague, Faculty of Electrical Engineering, Dept. of Mechanic and Materials Science, Technická 2, 166 27 Prague 6, Czech Republic

Bibliografia

• [1] http://www.isoloc.de/de/shop/maschinenschuhe.php?sid=3e5738138dl2f4c3d&cat=5.
• [2] VONDRICH J., THÔNDEL E., Online Optimization of Vibration Manufacturing System. Journal of Machine Engineering,, Vol, 7, No. 2007, 137-141.
• [3] http;//www.cgs.cz/~cgs/download/katalogy/katalogovy_list_vlnovec_dunlop.pdf.
• [4] Using Simulink, version 5.The Math Works, Inc., Natic. July 2002, 484 pgs.
• [5] STECHA J., HAVLENA V., Optimdlni rozhodovdnia fizeni, (Optimum and Decision of Control), Publishing CVUT, Prague, 2000, 242.
• [6] HAVLENA V., STECHA J., Moderni teorie rizeni, (Modern Theory of Control), Publishing CVUT Prague 2000, 298.
• [7] STECHA J., HAVLENA V.. Teorie dynamickych systémû, (Theory of Dynamical Systems), Publishing CVUT Prague, 1999, 248.
• [8] JOHN J., Systémy rizeni, (Systems of Control), Publishing CVUT, Prague, 1998, 110.
• [9] KOTEK Z., RAZIM M., Teorie nelineârnich, optimdlnich a adaptivnich rididch systémû, (Theory of Nonlinear, Optimum and Adaptive Control Systems), Publishing CVUT, Prague, 1990, 196.