STATE SPACE MODELING FROM FEM MODEL USING BALANCED REDUCTION
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Датум
2016
Наслов журнала
Журнал ISSN
Наслов волумена
Издавач
Technical faculty "Mihajlo Pupin", Zrenjanin
Апстракт
This paper shows discretized model of main spindle working unit module obtained byANSYS software. Based on the conducted modal analysis for first ten bending modes within frequency range from 0 to 10 kHz,main shapes and natural frequency (eigenfrequency) have been determined,and modal matrix was formed. Obtained results were afterwards used to determinemodel dynamic behavior in the state space using MATLAB. State space model wasfurther used as reference onefor modal reductionwhereby balanced reduction method was applied. Frequency response of full model (all oscillatory modes) and reduced model for direct FRF and cross FRF are presented through Bode diagram. Reliability of the model is verified by comparing the impulse response offull modeland reduced modelin time domain.
Опис
Кључне речи
natural frequencies, model order reduction, modal reduction, balanced reduction, state space