Schmiedt, Marius (2024)
Machine Learning Based Calibration of Dual Clutch Transmissions for Optimizing the Launch Behavior of Passenger Vehicles.
Technische Universität Darmstadt
doi: 10.26083/tuprints-00027365
Ph.D. Thesis, Primary publication, Publisher's Version
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Item Type: | Ph.D. Thesis | ||||
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Type of entry: | Primary publication | ||||
Title: | Machine Learning Based Calibration of Dual Clutch Transmissions for Optimizing the Launch Behavior of Passenger Vehicles | ||||
Language: | English | ||||
Referees: | Rinderknecht, Prof. Dr. Stephan ; Konigorski, Prof. Dr. Ulrich | ||||
Date: | 17 June 2024 | ||||
Place of Publication: | Darmstadt | ||||
Collation: | XIII, 110 Seiten | ||||
Date of oral examination: | 28 February 2024 | ||||
DOI: | 10.26083/tuprints-00027365 | ||||
Abstract: | The drivability of a vehicle is strongly affected by its transmission. Especially dual clutch transmissions (DCT) offer the chance of a comfortable drivability through its ability of blending the torque during gear shifts from one clutch to the other (jerkless shifting). Another advantage is the higher efficiency compared to torque converters. These advantages come with the drawback of a high control effort for the clutch engagement of the two clutches. The control effort is handled with software functions (developed using model-based programming languages) deployed on the transmission control unit (TCU) with adjustable control parameters (calibration parameters). With these control parameters e.g., the driving behavior is adjustable for different vehicle, engine combinations. Calibration engineers set these parameters at different ambient conditions to comply with customer requirements in an iterative time-consuming process on costly test trips. Therefore, costs are increasing with increasing control opportunities. An approach for decreasing these costs is to automate the optimization of the calibration parameters. Several approaches have already been introduced but some suffer from lack of stability or time efficiency. Hence, to optimize these parameters the target state optimization (TSO) algorithm is illustrated where a target state is approached with a hybrid solution of reinforcement learning (RL) and supervised learning (SL) to overcome existing drawbacks. Since particularly at low speeds the transmission behavior must meet the intention of the driver (drivers tend to be more perceptive at low speeds) the control of the launch behavior is crucial and is therefore investigated in this study. The algorithm is applied in different environments e.g., in a software in the loop (SiL) environment as well as in different test vehicles to optimize the launch behavior and to verify if a deployment in existing development processes is possible. Further the application in different environments such as in different test vehicles proves the ability of the TSO algorithm to generalize. |
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Uncontrolled Keywords: | machine learning, reinforcement learning, supervised learning, deep learning, dual clutch transmission, calibration, target state optimization, TSO | ||||
Status: | Publisher's Version | ||||
URN: | urn:nbn:de:tuda-tuprints-273659 | ||||
Classification DDC: | 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering | ||||
Divisions: | 16 Department of Mechanical Engineering > Institute for Mechatronic Systems in Mechanical Engineering (IMS) > Fahrzeugantriebe | ||||
TU-Projects: | Magna Powertrain|4500554480|Untersuchung von Anf | ||||
Date Deposited: | 17 Jun 2024 12:06 | ||||
Last Modified: | 18 Jun 2024 07:00 | ||||
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/27365 | ||||
PPN: | 519192486 | ||||
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