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Microrobot HAMR-JR

14.06.2020

Developed by scientists from Harvard, the HAMR-JR microrobot is only 2,25 centimeters long and weighs about 0,3 grams - no more than a penny coin. It can move at about 14 body lengths per second, making it not only one of the smallest, but also one of the fastest microrobots. The new model is one of the most agile micro-robots to date.

One of the main questions discussed in the study was whether the manufacturing process used to build previous versions of the HAMR and other microrobots, including the RoboBee, could be used to build robots of varying scale, from tiny surgical robots to large-scale industrial robots.

PC-MEMS is a fabrication process in which the components of a robot are engraved into a XNUMXD sheet and then extruded into its XNUMXD structure. To build the HAMR-JR, the researchers simply scaled down the robot's XNUMXD design - complete with actuators and embedded circuitry - to recreate a smaller robot with the same features as its larger counterparts. At the same time, scientists did not have to change anything in the previous design.

Zooming out changes some of the principles that govern things like stride length and joint stiffness, so the researchers also developed a model that can predict movement metrics like running speed, leg strength, and payload from a target. The model can then be used to design a system with the desired features.

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