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Hierarchical control of combined hybrid electric vehicle
by Mohsen Mohammadian, Seyyed Mohammad Taghi Bathaee, Amin Hajizadeh
International Journal of Electric and Hybrid Vehicles (IJEHV), Vol. 1, No. 4, 2008


Abstract: This paper describes a novel strategy developed for optimising the energy flow in a combined hybrid electric vehicle (CHEV) structure. This method implemented an online energy management by a hierarchical hybrid controller between dual sources in this kind of hybrid systems. This structure included two energy sources, the battery and the stack of fuel cells, and its power train system is based on an electric motor (EM) and internal combustion engine (ICE) in a parallel combination. The proposed control method involves a supervisory controller which in the first layer captures all the possible operation modes. In the second layer, an advanced fuzzy hybrid controller has been developed for each of the defined modes. Finally in the third layer of controller, there are local controllers to regulate the set points of each subsystem to reach the best performance and acceptable operation indexes. The simulation results confirm the feasibility and encourage more research toward an actual application.

Online publication date: Wed, 24-Dec-2008


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