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We discuss a robotic module called a Molecule. Molecules can be the basis for building self-reconfiguring robots. They support multiple modalities of locomotion and manipulation. We describe the design, functionality, and control of the Molecule. We show how a set of Molecules can aggregate as active three-dimensional structures that can move and change shape. Finally, we discuss global motion algorithms for Molecular structures.
Kotay et al. (Mon,) studied this question.