000			02694nab a2200241 4500
005			20260520003108.0
008			260224s2015 xxu ing
041			_aInglés
245	0	0	_aControl-Oriented Models for Real-Time Simulation of Automotive Transmission Systems
260			_a _b _cene./feb. 2015
270			_a14/09/2015 ; 14/09/2015
300			_a23 p. ; 67-90
520			_aTranscripción del resumen del autor: A control-oriented model of a Dual Clutch Transmission (DCT) was developed for real-time Hardware In the Loop (HIL) applications, to support model-based development of the DCT controller and to systematically test its performance. The model is an innovative attempt to reproduce the fast dynamics of the actuation system while maintaining a simulation step size large enough for real-time applications. The model comprehends a detailed physical description of hydraulic circuit, clutches, synchronizers and gears, and simplified vehicle and internal combustion engine sub-models. As the oil circulating in the system has a large bulk modulus, the pressure dynamics are very fast, possibly causing instability in a real-time simulation; the same challenge involves the servo valves dynamics, due to the very small masses of the moving elements. Therefore, the hydraulic circuit model has been modified and simplified without losing physical validity, in order to adapt it to the real-time simulation requirements. The results of offline simulations have been compared to on-board measurements to verify the validity of the developed model, which was then implemented in a HIL system and connected to the Transmission Control Unit (TCU). Several tests have been performed on the HIL simulator, to verify the TCU performance: electrical failure tests on sensors and actuators, hydraulic and mechanical failure tests on hydraulic valves, clutches and synchronizers, and application tests comprehending all the main features of the control actions performed by the TCU. Being based on physical laws, in every condition the model simulates a plausible reaction of the system. A test automation procedure has finally been developed to permit the execution of a pattern of tests without the interaction of the user; perfectly repeatable tests can be performed for non-regression verification, allowing the testing of new software releases in fully automatic mode.
581			_a1
773	0		_tOil and Gas Science and Technology _g70
942			_cARTICULO
100	1		_aCavina, N. _954857
100	1		_aCorti, E. _954858
100	1		_aMarcigliano, F. _954859
100	1		_aOlivi, D. _954860
100	1		_aPoggio, L. _954861
999			_c189198 _d189198