Information processing via physical soft body

Kohei Nakajima, Helmut Hauser, Tao Li, Rolf Pfeifer

Research output: Contribution to journalArticle (Academic Journal)

52 Citations (Scopus)
304 Downloads (Pure)

Abstract

Soft machines have recently gained prominence due to their inherent softness and the resulting safety and resilience in applications. However, these machines also have disadvantages, as they respond with complex body dynamics when stimulated. These dynamics exhibit a variety of properties, including nonlinearity, memory, and potentially infinitely many degrees of freedom, which are often difficult to control. Here, we demonstrate that these seemingly undesirable properties can in fact be assets that can be exploited for real-time computation. Using body dynamics generated from a soft silicone arm, we show that they can be employed to emulate desired nonlinear dynamical systems. First, by using benchmark tasks, we demonstrate that the nonlinearity and memory within the body dynamics can increase the computational performance. Second, we characterize our system's computational capability by comparing its task performance with a standard machine learning technique and identify its range of validity and limitation. Our results suggest that soft bodies are not only impressive in their deformability and flexibility but can also be potentially used as computational resources on top and for free.

Original languageEnglish
Article number10487
Number of pages11
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 27 May 2015

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