Dynamics and control of clutchless automated manual transmissions for electric vehicles

Walker, PD; Fang, Y; Zhang, N

Dynamics and control of clutchless automated manual transmissions for electric vehicles

Walker, PD

Fang, Y Zhang, N

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Publication Type:: Journal Article
Citation:: Journal of Vibration and Acoustics, Transactions of the ASME, 2017, 139 (6)
Issue Date:: 2017-12-01

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Field	Value	Language
dc.contributor.author	Walker, PD https://orcid.org/0000-0003-3988-3966	en_US
dc.contributor.author	Fang, Y	en_US
dc.contributor.author	Zhang, N https://orcid.org/0000-0001-6408-0044	en_US
dc.date.issued	2017-12-01	en_US
dc.identifier.citation	Journal of Vibration and Acoustics, Transactions of the ASME, 2017, 139 (6)	en_US
dc.identifier.issn	1048-9002	en_US
dc.identifier.uri	http://hdl.handle.net/10453/124227
dc.description.abstract	© 2017 by ASME. This paper presents a study of the dynamics and control of clutchless automated manual transmissions (CLAMT) for the purpose of investigating the system behavior during up and down shifts. To achieve this, a multibody dynamic model of the proposed powertrain is implemented to simulate the transient behavior of the system, including a direct current (DC) equivalent model of the electric machine (EM) and a synchronizer mechanism model. Closed-loop control of motor speed and torque is used in conjunction with synchronizer mechanism actuation to functionally achieve gear shifting without the need for a primary friction clutch. This includes nested torque-speed closed-loops to implement alternative motor control functionalities at different stages of gear change. To evaluate the performance of shift control, shift metrics including longitudinal jerk, vibration dose value (VDV), and shifting duration are evaluated from simulation results. These results demonstrate the most significant impact on the transient response of the powertrain results from the reduction and reinstatement of motor torque during shift control. Speed control of the motor during the shift transient directly impacts on the duration of shifting, but not the transient response of the powertrain.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DE170100134
dc.relation.ispartof	Journal of Vibration and Acoustics, Transactions of the ASME	en_US
dc.relation.isbasedon	10.1115/1.4036928	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Acoustics	en_US
dc.title	Dynamics and control of clutchless automated manual transmissions for electric vehicles	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	139	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	0915 Interdisciplinary Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	139	en_US

Abstract:

© 2017 by ASME. This paper presents a study of the dynamics and control of clutchless automated manual transmissions (CLAMT) for the purpose of investigating the system behavior during up and down shifts. To achieve this, a multibody dynamic model of the proposed powertrain is implemented to simulate the transient behavior of the system, including a direct current (DC) equivalent model of the electric machine (EM) and a synchronizer mechanism model. Closed-loop control of motor speed and torque is used in conjunction with synchronizer mechanism actuation to functionally achieve gear shifting without the need for a primary friction clutch. This includes nested torque-speed closed-loops to implement alternative motor control functionalities at different stages of gear change. To evaluate the performance of shift control, shift metrics including longitudinal jerk, vibration dose value (VDV), and shifting duration are evaluated from simulation results. These results demonstrate the most significant impact on the transient response of the powertrain results from the reduction and reinstatement of motor torque during shift control. Speed control of the motor during the shift transient directly impacts on the duration of shifting, but not the transient response of the powertrain.

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http://hdl.handle.net/10453/124227