American engineers have created a smaller version of Robotron HAMR. A new four-legged robot has a length of 2.25 cm and a mass of 320 milligrams. It uses eight piezoelectric actuators, operating at frequencies up to 200 Hz, which allows him to move at a speed of almost 14 body lengths per second. The developers have submitted an article about the robot at the conference ICRA 2020, and also told about it in interview to IEEE Spectrum.
In some areas demand very small robots that can run, usually limited set of tasks in conditions inaccessible to man because of the size. For example, Rolls-Royce introduced in 2018 the concept of diagnosis and repair of aircraft engines miniature robots, and then engineers from Harvard University in a joint company study created a real prototype of the robot, capable of walking on internal parts of the engine, and even upside down.
It was based on a miniature Robotron HAMR, variations of which engineers in recent years taught to walk on water, climb the hill and show other skills. The robot had a small size and has long been one of the most sophisticated machines in comparison with analogues, but in order for him or similar device you can actually apply for the stated task, for example, to navigate through small gaps at the examination of mechanisms and structures, it is necessary to work on further miniaturization of components.
In his new work, the engineers from Harvard University under the leadership of Robert wood (Robert Wood) have created a working prototype of reduced Robotron HAMR-Jr several times smaller weight and size: 320 milligrams and 2.25 centimeters in length. Like its “ancestor” of HAMR, the new robot consists of a carbon fiber frame, miniature electronics, and the main component of the piezoelectric actuators with a mechanical transmission.