SA E TECHNICAL PA PER SERIES The Engineering Society eA =For Advancing Mobility 1 and Sea Air and Space, Dynamic Simulation Modeling For Heavy Duty Automatic Transmission Control Development Fereydoon Jamzadeh Tung-Ming Hsieh Keith Struthers Allison Transmission Division General Motors Corporation /I-& 5-- 72 International Truck & Bus Meeting and Exposition Toledo, Ohio November 16-1 9,1992 400 COMMONWEALTH DRIVE, WARRENDALE, PA 15096-0001 U.S.A. 90-0723PG Downloaded from SAE International by University of New South Wales, Sunday, September 16, 2018The appearance of the ISSN code at the bottom of this page indicates SAE's consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition, however, that the copier pay a $5.00 per article copy fee through the Copyright Clearance Center, Inc. Operations Center, 27 Congress St., Salem, MA 01 970 for copying beyond that permitted by Sections 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Service Department. To obtain quantity reprint rates, permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. Ail SAE papers, standards, and selected books are abstracted and indexed In the SAE Global Mobility Dafabase No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. ISSN 01 48-71 91 Copyright 1991 Society of Automotive Engineers, Inc. Position and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible forthe content of the paper. A process is available by which discussions will be printed with the paper if it is published in SAE transactions. For permission to publish this paper in full or in part, contact the SAE Publications Division. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Activity Board, SAE. Printed in USA Downloaded from SAE International by University of New South Wales, Sunday, September 16, 2018Dynamic Simulation Modeling For Heavy Duty Automatic Transmission Control Development Fereydoon Jamzadeh Tung-Ming Hsieh Keith Struthers Allison Transmission Division General Motors Corporation ABSTRACT A simplified, modular, and generic simulation model of an automatic transmission has been devel- oped for use in control system development. This model employs a two clutch concept to simulate the range pack of an automatic transmission. As a re- sult, this model can be adapted to any transmission which relies on clutch-to-clutch (oncoming and offgoing) shift transitions. The model simulates ro- tating clutches as well as stationary clutches by simply setting the proper gear configuration and ratio around the clutch. The model is capable of continuous simulation of the power train by instan- taneous change of gear ratio and associated param- eters particular to each shift. Lockup clutch and torque converter models are integrated in parallel and represent the alternative power paths between the range pack and engine. Also included are models of the engine, brake, re- tarder, and road load. An optional hydrostatic steer model is also incorporated. This model is currently being used as a core for a real time dynamic simulator at Allison Transmis- sion Division (ATD) of General Motors Corporation to facilitate military transmission control