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Mixed-mode Integration for Real-time Simulation

Schiela, A. and Olsson, H. (2000) Mixed-mode Integration for Real-time Simulation. In: Workshop Proceedings, pp. 69-75. Modelica 2000 Workshop, 2000-10-23 - 2000-10-24, Lund, Sweden.

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Official URL: http://www.modelica.org/workshop2000/proceedings/Schiela.pdf


The new possibilities of multi-domain hierarchical modelling often lead to models with both fast and slow parts. In this paper a new approach to simulate such systems is discussed that is especially useful in real-time applications. Mixed-mode integration represents a middle course between implicit and explicit integration. The main idea is to split up the system into a fast and a slow part and to apply implicit discretization only to the fast part. The partitioning of the system can be performed offline using a newly developed automatic selection routine, before real-time simulation starts. Mixed-mode integration was applied to several Modelica models from different fields, e.g. models of a diesel engine and an industrial robot and tested using Dymola. Speedup factors from about 4-16 were recorded. In this paper, mixed-mode integration is introduced, the selection routine is described and numerical results are presented.

Document Type:Conference or Workshop Item (Paper)
Additional Information:LIDO-Berichtsjahr=2001,
Title:Mixed-mode Integration for Real-time Simulation
AuthorsInstitution or Email of Authors
Olsson, H.Dynasim AB, Sweden
Journal or Publication Title:Workshop Proceedings
Page Range:pp. 69-75
Peter Fritzson, UNSPECIFIED
Keywords:Modelica, positioned integration, mixed-mode integration, HIL simulation, real time simulation
Event Title:Modelica 2000 Workshop
Event Location:Lund, Sweden
Event Type:international Conference
Event Dates:2000-10-23 - 2000-10-24
Organizer:The Modelica Association
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:12 Dec 2013 20:01

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