The article presents an experimental methodology used to characterize the torsional dynamic behaviour of automotive transmission systems and components and the analytical methods for simulating them in the frequency domain. A general description of the test bench is given in the paper: it is composed of an induction motor for the torsional excitation of the system and of torque and angular position sensors. The tests were carried out by keeping one end of the transmission locked. Two case study are discussed: a Dual Mass Flywheel (DMF) and a complete Automated Manual Transmission (AMT). In the first example the experimental data from sine sweep tests are used to estimate the damping factor of the DMF. In the second case the dependency of the frequency response function (FRF) on the engaged gear ratio for a 5-speed AMT is investigated. A torsional model for each test rig configuration is proposed and the corresponding equations of motion derived. The compliance FRFs of the torsional systems are then numerically evaluated and compared with the results from the experiments. A good match between simulated and measured data is shown.
Test Bench Characterisation and Frequency Domain Torsional Model Validation of Transmission Systems and Components / Galvagno, Enrico; Tota, Antonio; Velardocchia, Mauro; Vigliani, Alessandro. - ELETTRONICO. - (2015), pp. 1-9. (Intervento presentato al convegno TrC-IFToMM Symposium on Theory of Machines and Mechanisms tenutosi a Izmir, Turkey nel June 14-17, 2015).
Test Bench Characterisation and Frequency Domain Torsional Model Validation of Transmission Systems and Components
GALVAGNO, ENRICO;TOTA, ANTONIO;VELARDOCCHIA, Mauro;VIGLIANI, Alessandro
2015
Abstract
The article presents an experimental methodology used to characterize the torsional dynamic behaviour of automotive transmission systems and components and the analytical methods for simulating them in the frequency domain. A general description of the test bench is given in the paper: it is composed of an induction motor for the torsional excitation of the system and of torque and angular position sensors. The tests were carried out by keeping one end of the transmission locked. Two case study are discussed: a Dual Mass Flywheel (DMF) and a complete Automated Manual Transmission (AMT). In the first example the experimental data from sine sweep tests are used to estimate the damping factor of the DMF. In the second case the dependency of the frequency response function (FRF) on the engaged gear ratio for a 5-speed AMT is investigated. A torsional model for each test rig configuration is proposed and the corresponding equations of motion derived. The compliance FRFs of the torsional systems are then numerically evaluated and compared with the results from the experiments. A good match between simulated and measured data is shown.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2618330
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