Dynamic Simulation Modeling For Heavy Duty Automatic Transmission Control Development 922441
A simplified, modular, and generic simulation model of an automatic transmission has been developed for use in control system development. This model employs a two clutch concept to simulate the range pack of an automatic transmission. As a result, this model can be adapted to any transmission which relies on clutch-to-clutch (oncoming and offgoing) shift transitions. The model simulates rotating 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 instantaneous change of gear ratio and associated parameters 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, retarder, 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 Transmission Division (ATD) of General Motors Corporation to facilitate military transmission control system algorithm and logic equation development in the lab environment. Use of this simulator has resulted in a significant reduction in transmission controls checkout time during both test stand and vehicle level controls development testing.
Citation: Jamzadeh, F., Hsieh, T., and Struthers, K., "Dynamic Simulation Modeling For Heavy Duty Automatic Transmission Control Development," SAE Technical Paper 922441, 1992, https://doi.org/10.4271/922441. Download Citation
Author(s):
Fereydoon Jamzadeh, Tung-Ming Hsieh, Keith Struthers
Affiliated:
Allison Transmission Division General Motors Corporation
Pages: 14
Event:
International Truck & Bus Meeting & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1992 Transactions: Journal of Commercial Vehicles-V101-2
Related Topics:
Automatic transmissions
Torque converters
Clutches
Simulation and modeling
Transmissions
Control systems
Mathematical models
Simulators
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
