Co-simulation of algebraically coupled dynamic subsystems

In the manufacturing industry out-sourcing/integration is becoming an important business pattern (not a clear statement-integration still done in house-component design and manufacturing outsourced). An engineering system often consists of many subsystems supplied by different companies. Bridge between thoughts is weak. Object-oriented modeling is an effective tool for modeling of complex coupled systems. However, subsystem models have to be assembled and compiled before they can produce simulation results for the coupled system. Compiling models into simulations? is time consuming and often requires a profound understanding of the models. Also, the subsystem makers cannot preserve their proprietary information in the compilation process. This research is intended to address this problem by extending object-oriented modeling to object-oriented simulation called co-simulation. Co-Simulation is an environment in which we can simultaneously run multiple independent compiled simulators to simulate a large coupled system. This research studies a major challenge of object-oriented simulation: incompatible boundary conditions between subsystem simulators caused by causal conflicts. The incompatible boundary condition is treated as an algebraic constraint. The high index of the algebraic constraint is reduced by defining a sliding manifold, which is enforced by a discrete-time sliding mode controller. The discrete-time approach fits well with the numerical simulation since it can guarantee numerical stability.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Mechanical Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2001

Author dc:creator

• Gu, Bei, 1970-

Advisor dc:contributor.advisor

• H. Harry Asada.

• Mechanical Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/8695

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/8695