This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Real-Time Hydro-Mechanical Transmission System Simulations for Model-Guided Assessment of Complex Shift Sequence
Technical Paper
2021-01-0715
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Event:
SAE WCX Digital Summit
Language:
English
Abstract
Model-guided development of drivetrain control and calibration is a key enabler of robust and efficient vehicle design process. A number of CAE tools are available today for modeling hydro-mechanical systems. Automatic transmission behaviors are well understood to effectively tune the model parameters for targeted applications. Drivetrain models provide physical insight for understanding the effects of component interactions on system behaviors. They are also widely used in HIL/SIL environments to debug control strategies. Nonetheless, it is still a challenge to predict shift quality, especially during a sequence of multiple events, with enough accuracy to support model-guided control design and calibration. The inclusion of hydraulic circuits in simulation models often results in challenges for numerical simulation. The complex interaction of component behaviors can make it difficult to tune a large number of model parameters in a manner consistent with an engineer’s intuition concerning the physical behavior. Missing physical effects in a single component may throw off the entire tuning process. Each application often requires a distinct method to refine the model, making the ease of model adjustments particularly important. In this work, Simscape™ is used to construct a predictive hydro-mechanical system model to replicate a complex shift sequence for a vehicle equipped with a 10-speed transmission. A spool-type pressure regulator valve is modeled to command clutch engagement and release actions. Simscape allows the inclusion of custom models in a native MATLAB® environment. Custom model adjustments based on input from domain experts are effortless, and can include details such as clutch piston seal friction. A real-time open-loop simulation yields excellent agreement with vehicle acceleration data for the entire sequence of 1-3-5-6-4-3-1 shifts. A shift control signal is altered to demonstrate its utility as an enabler of model-guided control design. Key shift quality attributes are evaluated based on the predicted vehicle acceleration to compare advanced control concepts. The model provides the means to efficiently assimilate the knowledge of domain experts to isolate and correct shortfalls during iterative model development process. In summary, a truly collaborative modeling environment proves to be a key to building a predictive drivetrain model especially for high-fidelity applications.
Authors
Topic
Citation
Tang, Y., Rodgers, J., McCallum, J., Zhang, Y. et al., "Real-Time Hydro-Mechanical Transmission System Simulations for Model-Guided Assessment of Complex Shift Sequence," SAE Technical Paper 2021-01-0715, 2021, https://doi.org/10.4271/2021-01-0715.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Bai , S. , Maguire , J. , and Peng , H. 2013 978-0-7680-7604-2
- https://www.mathworks.com/products/simscape.html
- Xu , X. , Liang , Y. , Jordan , M. , Tenberge , P. , and Dong , P. Optimized Control of Engine Start Assisted by the Disconnect Clutch in a P2 Hybrid Automatic Transmission J. Mechanical Systems and Signal Processing 124 313 329 2019
- Zhang , Y. , Haria , H. , Hippalgaonkar , R. , Pietron , G. et al. Automatic Transmission Shift Control for Canceling Inertia Torque SAE Technical Paper 2018-01-1167 2018 https://doi.org/10.4271/2018-01-1167
- Haria , H. , Fujii , Y. , Pietron , G. , Miyagawa , M. et al. Advanced Bench Test Methodology for Generating Wet Clutch Torque Transfer Function for Enhanced Shift Simulations SAE Technical Paper 2019-01-2340 2019 https://doi.org/10.4271/2019-01-2340
- Haria , H. , McCallum , J. , Fujii , Y. , Tsuchiya , T. et al. Dynamic Characterization and Modeling of Wet Clutch Actuator for High-Fidelity Propulsion System Simulations SAE Technical Paper 2020-01-1414 2020 https://doi.org/10.4271/2020-01-1414
- Guse , D. , Klein , S. , Andert , J. , Pischinger , S. et al. Virtual Transmission Evaluation Using an Engine-in-the-Loop Test Facility SAE Technical Paper 2018-01-1361 2018 https://doi.org/10.4271/2018-01-1361
- Fujii , Y. , Kapas , N. , and Tseng , J. Clutch Wet Encyclopedia of Automotive Engineering Wiley & Sons 2014
- Deur , J. , Petric , J. , Asgari , J. , and Hrovat , D. Modeling of Wet Clutch Engagement Including A Thorough Experimental Validation SAE Technical Paper 2005-01-0877 2005 https://doi.org/10.4271/2005-01-0877
- Jiang , J. , Wang , S. , and Sun , W. Simulation and Optimization of Automatic Transmission Hydraulic Control Module 2nd Int. Conf. on Robotics and Automation Eng. Shanghai China 2017
- Xu , Y. , Fujii , Y. , Dai , E. , McCallum , J. et al. Piecewise 1st Order Hydraulic Actuator Model for Transient Transmission Simulations SAE Technical Paper 2017-01-1140 2017 https://doi.org/10.4271/2017-01-1140
- Krishnaswami , R. and Norris , K. All-New Ford 10-Speed RWD Planetary Transmission Design & Development 10th International CTI Symposium—Automotive Transmissions, HEV and EV Drives 2016
- https://www.avl.com/-/avl-drive-4
- Wang , W. , Cao , L. , and Qu , F. Driving Performance Test of Plug-In Hybrid Electric Vehicle Based on AVL-DRIVE 5th Int. Conf. on Control, Automation & Robotics Beijing, China 2019 Vehicle Test & AVL Drive
- Teslak , C. , Tseng , E. , Cicala , S. , Riedle , B. et al. Implementation of Torque Hole Filling for Transmission Shift Control SAE Technical Paper 2018-01-1169 2018 https://doi.org/10.4271/2018-01-1169