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Modeling and Realtime Simulation of an Automatic Gearbox using Modelica

Otter, M. and Schlegel, C. and Elmqvist, E. (1997) Modeling and Realtime Simulation of an Automatic Gearbox using Modelica. 9th European Simulation Symposium and Exhibition Simulation in Industry, 19.-22.10.97, Passau.

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Abstract

To speed up the development cycle of electronically controlled mechanical devices, hardware-in-the-loop simulation is used more and more. Applying this method to an automatic gearbox of a car, the electronic transmission control hardware is tested against a model of the gearbox, which is simulated in realtime. Modeling such a system is a demanding task, because its structure varies during gearshift. Since the gearbox investigated has six switching elements (clutches and freewheels) the actual structure has to be found amongst 2^6=64 possible configurations. It is shown how such a variable structure system can be modeled with Modelica and how a consistent configuration can be found in realtime after a gearshift occured. The results presented show that it is possible to simulate variable structure systems in realtime using standard realtime simulation hardware and appropriate software tools.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Modeling and Realtime Simulation of an Automatic Gearbox using Modelica
Authors:
AuthorsInstitution or Email of Authors
Otter, M.UNSPECIFIED
Schlegel, C.UNSPECIFIED
Elmqvist, E.Dynasim AB, Sweden
Date:1997
Page Range:pp. 115-121
Status:Published
Keywords:hardware-in-the-loop, simulation, gearbox, variable structure systems, realtime simulation
Event Title:9th European Simulation Symposium and Exhibition Simulation in Industry, 19.-22.10.97, Passau
Organizer:ESS'97
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W SY - Technik für Raumfahrtsysteme
DLR - Research area:Space
DLR - Program:W SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 17:54

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