Soft Robot Swarms

Compared to traditional rigid systems, soft robots have the potential to be robust, cheap, versatile, and able to navigate in unpredictable environments and confined spaces. These are all features that would lend themselves well to a robot swarm. Currently, however, the majority of soft systems exploit air- or fluid-filled flexible chambers restricting them to the use of compressors or pumps through tethers or bulky payloads. Furthermore, few soft actuators are able to carry large payloads, or tune their rigidity when the circumstances require it. Finally, there is still a need for better proprioceptive soft sensors to enable stand-alone soft robots. The following text describes our efforts to address these shortcomings, with the eventual goal of creating soft robot swarms.

Soft Robots and Sensors

Intelligent soft robots require sensors for proprioception, proximal sensing, and longer range sensing. In this context, we have funding from the National Institute of Food and Agriculture and the Cornell Digital Agriculture Initiative to explore ways in which soft robots may safely interact with and measure the state of crops in the field for improved yield conditions.

Actuators in Soft Robots

We are exploring several paths to enable soft robot collectives including bio-inspired inching robots with small form-factor electro-mechanical backpacks, novel soft actuators that can exhibit very large deformations without the use of pumps and valves (work done at Max Planck), work on soft robots with granular fluids that enable rigidity transformation, and embodied intelligent designs that permit complex motions from just a single pump and valve.

Publications

  • T. Duggan, A. Ulug, and K. Petersen. “Non-Holonomic Locomotion in an Inchworm-Inspired Soft Robot”. Under review.
  • C. Futran, S. Ceron, B. MacMurray, R. Shepherd, and K. Petersen. “Leveraging Fluid-Resistance in Soft Robots”. First international IEEE-RAS conference on Soft Robotics (RoboSoft), Livorno, 2018. (Pdf)
  • S. Ceron, A. Kurumunda, E. Garg, M. Kim, T. Yeku, and K. Petersen. “Popcorn-Driven Robotic Actuators”. IEEE International Conference on Robotics and Automation (ICRA), Brisbane, 2018. (Pdf)
  • P. Polygerinos, N. Correll, S. Morin, B. Mosadegh, C. Onal, K. Petersen, M. Cianchetti, M. Tolley, and R. Shepherd. “Soft Robotics: Review of Fluid-Driven Intrinsically Soft Devices; Manufacturing, Sensing, Control, and Applications in Human-Robot Interaction”. Advanced Materials (2017). DOI: 10.1002/adem.201700016. (Paper) (CoverMost read in July 2017.
  • L. Hines, K. Petersen, and M. Sitti. “Asymmetric Stable States in Inflated Dielectric Elastomer Actuators”. IEEE International Conference on Robotics and Automation (ICRA), Singapore, 2017. (Pdf)
  • L. Hines*, K. Petersen*, G. Z. Lum, and M. Sitti. “Soft Actuators for Small-Scale Robotics.” Advanced Materials (2016): 1521-4095. DOI: 10.1002/adma.201603483. *Equally contributing authors. (Paper)
  • L. Hines*, K. Petersen*, and M. Sitti. Inflated Soft Actuators with Reversible Stable Deformations. Communication Advanced Materials. 10.1002/adma.201600107, 2016. *Equally contributing authors. (Paper)