TY - GEN A1 - Wehbi, Kassem A1 - Bestle, Dieter A1 - Beilharz, Jörg T1 - Automatic Calibration Process for Optimal Control of Clutch Engagement during Launch T2 - Mechanics Based Design of Structures and Machines Y1 - 2017 U6 - https://doi.org/10.1080/15397734.2016.1250221 SN - 1539-7742 VL - 45 IS - 4 SP - 507 EP - 522 ER - TY - CHAP A1 - Bestle, Dieter A1 - Wehbi, Kassem T1 - Optimal Launch of Vehicles with Automated Transmission T2 - 4th Joint International Conference on Multibody System Dynamics, Montreal 2016 Y1 - 2016 SN - 978-0-9682827-9-3 PB - McGill University CY - Montreal ER - TY - CHAP A1 - Wehbi, Kassem A1 - Wurm, Andreas A1 - Bestle, Dieter A1 - Beilharz, Jörg ED - Röpke, Karsten ED - Gühmann, Clemens T1 - Automated Calibration Using Simulation and Robust Design Optimization Improving Shift and Launch Quality of Automatic Transmissions T2 - Automotive data analytics, methods, DoE, proceedings of the International Calibration Conference Y1 - 2017 SN - 978-3-8169-3381-6 SP - 18 EP - 33 PB - Expert Verlag CY - Renningen ER - TY - CHAP A1 - Wehbi, Kassem A1 - Bestle, Dieter A1 - Kahlbau, Sebastian T1 - Multi-objective Launch Control Optimization for Automatic Clutch Engagement T2 - Tagungsband, 6th International Conference on Experiments/Process/System Modeling/Simulation/ Optimization (6th IC-EpsMsO), Athen (Griechenland), 8.-11. Juli 2015 KW - Optimisation KW - Multi-objective Launch Control Y1 - 2015 SN - 978-618-80527-8-9 PB - LFME CY - Athen ER - TY - THES A1 - Kassem, Wehbi T1 - Launch control optimization of transmissions with automated clutch engagement N2 - Thanks to the physical principle of a hydraulic torque converter, launch in classic automatic transmissions is automatically smooth. In low-cost transmissions with installed friction clutches, however, the engagement of the clutch has to be controlled by the transmission control unit (TCU) which makes the calibration parameters responsible for the launch quality. The growing complexity and diversity of modern powertrains increases the calibration effort dramatically, which is why automation of the calibration process for automatic transmissions becomes increasingly important. Through the automated search for optimal values for the launch parameters, the quality of the launch event and the efficiency of the transmission calibration process can be increased significantly. Therefore, an important aspect of this work is to develop strategies for improving the launch quality as a part of the automated transmission calibration. The concept of numerical optimization has proven to be a promising support tool for the engineer. This requires objectification of the usually subjectively rated launch quality, where the main goal is to achieve a fast and smooth clutch engagement at the same time. Based on these goals, a bi-criterion optimization problem is defined and solved by a multi-objective genetic algorithm. The solution of the problem is not unique but always a set of optimal trade-offs between the two conflicting criteria. Besides, a purely determinism based interpretation of the automated calibration process can only partly meet the requirements of practical application since in reality the properties of technical systems scatter. Therefore, robustness is additionally considered as inherent design goal to generally assure high quality and reliability of launch control. KW - launch KW - launch objectives KW - multi-criteria optimization KW - vehicle dynamic KW - automated transmission calibration KW - robustness Y1 - 2017 SN - 978-3-8440-5384-5 PB - Shaker Verlag GmbH CY - Aachen ER -