Pressure control of an electro-hydraulic actuated clutch via novel hysteresis model

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This paper mainly focuses on the development of pressure tracking control logic of electro-hydraulic actuators for vehicle application. This is done to improve and ensure the performance of a precise lower-level controller for evolving modern shift control logic. The required performance is obtained by hysteresis model-based feed-forward control and additional feedback control. The hysteresis and the time delay, which adversely affect pressure control, are well known nonlinear behaviors in electro-hydraulic actuators. In order to cope with the hysteresis, a novel hysteresis model is proposed based on a physical phenomenon. A mathematical model based on a characteristic curve obtained in preliminary experiments is presented using only one tuning parameter, and this model can be inverted easily to construct a feed-forward controller. In addition, a feedback controller is designed considering the stability margin of a time delay system. The feedback control inputs ensure compensation of the feed-forward errors caused by model error and uncertainty. The proposed controller is designed to lower computational cost considering applicability for production vehicles. As a result, the developed pressure controller is applied to a transmission control unit of a production vehicle and verified experimentally for various driving scenarios.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2019-10
Language
English
Article Type
Article
Citation

CONTROL ENGINEERING PRACTICE, v.91

ISSN
0967-0661
DOI
10.1016/j.conengprac.2019.104112
URI
http://hdl.handle.net/10203/267960
Appears in Collection
ME-Journal Papers(저널논문)
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