Publication: Implementation of on-line clutch pressure estimation for stepped automatic transmissions
Issued Date
2005-09-01
Resource Type
ISSN
07431619
Other identifier(s)
2-s2.0-23944505573
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Mahidol University
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SCOPUS
Bibliographic Citation
Proceedings of the American Control Conference. Vol.3, (2005), 1607-1612
Suggested Citation
Sarawoot Watechagit, Krishnaswamy Srinivasan Implementation of on-line clutch pressure estimation for stepped automatic transmissions. Proceedings of the American Control Conference. Vol.3, (2005), 1607-1612. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/16509
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Title
Implementation of on-line clutch pressure estimation for stepped automatic transmissions
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Abstract
On-line estimation of clutch pressures in hydraulically powered stepped automatic transmissions can be useful for on-line diagnostics or development of closed-loop transmission control to improve shift quality. This paper presents the development and implementation of a model-based sliding mode observer to provide on-line estimates of clutch pressures for the clutches involved in gear shifts. The estimation of transmission input torque (torque converter turbine torque), which is needed by the observer for accurate clutch pressure estimation but is not available, is also addressed here and implemented using an adaptive sliding mode observer. The resulting observers are validated via off-line simulation tests, as well as on-line tests at different sampling frequencies on a test vehicle, in order to demonstrate observer performance and establish the feasibility of the approach. ©2005 AACC.