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Rehabilitation using a force-actuated robot + demonstration

Ľuboš Chovanec - Researcher, Slovak University of Technology in Bratislava ·

In rehabilitation centres we can meet with various single-purpose machines. With the right deployment of force-actuated robotic arms, new multi-purpose rehabilitation machines can be created that can be easily brought to the patient's bedside. Such equipment can be continuously expanded with additional functionalities, new rehabilitation procedures and continuously developed for the benefit of therapists and patients.

Robotics that helps therapists is not sci‑fi, but the result of work by a team from STU. Ľuboš Chovanec from the Faculty of Electrical Engineering and Information Technology showed how you can move from the laboratory to real medical applications. From laser hair removal through ultrasound therapy to lower‑limb rehabilitation—with an emphasis on safety and ease of use.

From cranes to medicine: why force‑compliant robots

Chovanec has been at STU for roughly ten years, focusing on system identification, signal processing, and control of mechatronic devices. Experience with dynamically sensitive systems such as cranes led him to force‑compliant and collaborative robots. The turning point came when a physician approached the team with the idea of automating laser hair removal on legs, where the manual procedure with a heavy handpiece, cooling, and skin heating is not comfortable for either the therapist or the patient.

In the first phase they created a semi‑autonomous mode: the therapist merely guided the robot over the designated area and the system made sure it didn’t return to the same spot. Later came full autonomy—the operator marked the zone on a tablet and the robot located the leg in real time using a stereo pair of cameras and a projector, updating roughly once per second. The project reached the finals of an international competition alongside teams from the USA, Germany, China, and Italy; the Italians ultimately won and took home a prize of 20,000. The Slovak team did not win, but gained valuable experience and the attention of the professional community.

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Ľuboš Chovanec

Slovak University of Technology in Bratislava
Ing. Ľuboš Chovanec, PhD. works as a researcher and lecturer at the Institute of Robotics and Cybernetics of the FEEIT STU since 2013. He is also a member of the National Robotics Centre, where he tries to link university research with the requirements of companies and other scientific institutions. In his PhD thesis, he worked on the control of…
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