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论文类型：期刊论文

发表时间：2014-01-01

发表刊物：INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS

收录刊物：SCIE、EI、Scopus

卷号：46

期号：4

页面范围：751-762

ISSN号：1383-5416

关键字：Hybrid systems; control; electro-magnetic force; free piston energy converter

摘要：A Free Piston Energy Converter (FPEC) is a combination of a linear combustion engine and a linear electrical machine. It is a potential technology for series hybrid vehicles, as well as stationary power generation applications. In a free piston energy converter, the piston is not connected to a crank-shaft. Instead, the piston movement is "free" and controlled by a linear hydraulic or electric machine. The major advantages of such a design over the conventional ones are the simpler engine layout and much improved conversion efficiency. Unlike other traditional modeling method, in this paper, the free piston converter is modeled as a hybrid automaton. A hierarchical hybrid controller is designed based on this model. The hybrid controller includes a discrete controller which is in charge of switching actions and a continuous controller which compute the electro-magnetic force. High-fidelity simulation results are provided to illustrate the applicability and performance of developed control law.