The future of unmanned underwater systems will depend on the next generation of transducers. Artimus Robotics has developed a new type of transducer, called a hydraulically amplified soft electrostatic (HASEL) transducer, that can simultaneously act as an actuator, generator, and sensor. These transducers possess unique features for underwater systems, particularly deep-sea applications. Their structure is completely incompressible, allowing operation at full ocean depth without loss of performance or the need for a pressure vessel. They have nearly no acoustic or magnetic signature and possess no sliding or rotating parts which limit the effects of biofouling. HASEL transducers can act as sensors to monitor their deformation state and provide built-in control feedback. These sensing capabilities can also be used to measure pressure differentials or moving water. Moreover, HASELs can also convert hydrokinetic energy into electricity to autonomously recharge onboard power systems. These characteristics, coupled with their muscle-mimetic performance, enable a new platform for the development of depth tolerant underwater robots that are highly stealthy, persistent, and multi-functional.
Over the past few years, we have been working with the Office of Naval Research to bring this new generation of robots to life. We will discuss recent efforts to create fast and efficient hydrostatic swimming robots inspired by tuna fish, as well as worm robots that can dig through granular seabed media.
