liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Robust Torque Control for Automated Gear Shifting in Heavy Duty Vehicles
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering.
Linköping University, The Institute of Technology.
2008 (English)Independent thesis Advanced level (professional degree), 20 points / 30 hpStudent thesisAlternative title
Robust Momentreglering vid Automatiserad Växling i Tunga Fordon (Swedish)
Abstract [en]

In an automated manual transmission it is desired to have zero torque in the transmission when disengaging a gear. This minimizes the oscillations in the driveline which increases the comfort and makes the speed synchronization easier. The automated manual transmission system in a Scania truck, called Opticruise, uses engine torque control to achieve zero torque in the transmission.In this thesis different control strategies for engine torque control are proposed in order to minimize the oscillations in the driveline and increase the comfort during a gear shift. A model of the driveline is developed in order to evaluate the control strategies. The main focus was to develop controllers that are easy to implement and that are robust enough to be used in different driveline configurations. This means that model dependent control strategies are not considered.A control strategy with a combination of a feedback from the speed difference between the output shaft speed and the wheel speed, and a feedforward with a linear ramp, showed very good performance in both simulations and tests in trucks. The amplitude of the oscillations in the output shaft speed after neutralengagement are halved compared to the results from the existing method in Scania trucks. The new concept is also more robust against initial conditions and time delay estimations.

Place, publisher, year, edition, pages
2008. , 99 p.
driveline, modeling, torque control, automated manual transmission, heavy truck
drivlina, modellering, momentreglering, AMT, tung lastbil
National Category
Control Engineering
URN: urn:nbn:se:liu:diva-15883ISRN: LiTH-ISY-EX--08/4182--SEOAI: diva2:127933
Available from: 2008-12-11 Created: 2008-12-10 Last updated: 2008-12-11Bibliographically approved

Open Access in DiVA

fulltext(2558 kB)4473 downloads
File information
File name FULLTEXT01.pdfFile size 2558 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Abrahamsson, HenrikCarlson, Peter
By organisation
The Institute of TechnologyDepartment of Electrical Engineering
Control Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 4473 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 1046 hits
ReferencesLink to record
Permanent link

Direct link