Simultaneous observation of hybrid states for cyber-physical systems: a case study of electric vehicle powertrain

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dc.contributor.authorLv, Chen
dc.contributor.authorLiu, Yahui
dc.contributor.authorHu, Xiaosong
dc.contributor.authorGuo, Hongyan
dc.contributor.authorCao, Dongpu
dc.contributor.authorWang, Fei-Yue
dc.date.accessioned2017-11-13T09:31:45Z
dc.date.available2017-11-13T09:31:45Z
dc.date.issued2017-08-22
dc.description.abstractAs a typical cyber-physical system (CPS), electrified vehicle becomes a hot research topic due to its high efficiency and low emissions. In order to develop advanced electric powertrains, accurate estimations of the unmeasurable hybrid states, including discrete backlash nonlinearity and continuous half-shaft torque, are of great importance. In this paper, a novel estimation algorithm for simultaneously identifying the backlash position and half-shaft torque of an electric powertrain is proposed using a hybrid system approach. System models, including the electric powertrain and vehicle dynamics models, are established considering the drivetrain backlash and flexibility, and also calibrated and validated using vehicle road testing data. Based on the developed system models, the powertrain behavior is represented using hybrid automata according to the piecewise affine property of the backlash dynamics. A hybrid-state observer, which is comprised of a discrete-state observer and a continuous-state observer, is designed for the simultaneous estimation of the backlash position and half-shaft torque. In order to guarantee the stability and reachability, the convergence property of the proposed observer is investigated. The proposed observer are validated under highly dynamical transitions of vehicle states. The validation results demonstrates the feasibility and effectiveness of the proposed hybrid-state observer.en_UK
dc.identifier.citationChen Lv, et al. Simultaneous observation of hybrid states for cyber-physical systems: a case study of electric vehicle powertrain, IEEE Transactions on Cybernetics, Volume 48, Issue 8, August 2018, pp2357-2367en_UK
dc.identifier.issn2168-2267
dc.identifier.urihttp://dx.doi.org/10.1109/TCYB.2017.2738003
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12714
dc.language.isoenen_UK
dc.publisherIEEEen_UK
dc.rights©2017 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
dc.subjectSimultaneous observationen_UK
dc.subjectcyber physicalen_UK
dc.subjecthybrid statesen_UK
dc.subjectbacklash nonlinearityen_UK
dc.subjectelectric powertrainen_UK
dc.titleSimultaneous observation of hybrid states for cyber-physical systems: a case study of electric vehicle powertrainen_UK
dc.typeArticleen_UK

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