We present the EP-Face connector, a novel connector for hybrid chain-lattice type modular robots that is highstrength (88.4N), compact, fast, power efficient, and robust to position errors. The connector consists of an array of electro-permanent magnets (EP magnets) embedded in a planar face. EP magnets are solid-state magnets that can be turned on and off and require power only when changing state. In this paper, we present the design of the connector, manufacturing process, detailed experimental characterization of the connector strength under different loading conditions, and compare its performance to existing magnetic and mechanical connectors. We also illustrate the functional benefits of the EPFace by demonstrating reconfiguration with the SMORES-EP robot.
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Tosun et al. (2016) studied this question.
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