Researchers from Harbin University of Technology have developed a compact robotic
Robotics around the world within a fewFor decades, they have been working on the creation of manipulators that can imitate the dexterity of human hands when working with various objects. During this time, many different devices have been created, but the lack of all these developments is fragility, the scientists explain. Accidental impacts, which inevitably occur in the working environment, can lead to device failure.
Robotic finger, resistant to external influences. Image: Handong Hu et al., Frontiers of Mechanical Engineering
To overcome these problems, engineersdeveloped an antagonistic finger mechanism of variable stiffness. The device is powered by a gear train that is more reliable and easier to manufacture and maintain than today's dexterous cable-operated hands. And the principle of operation of the device is based on the concept of mechanical passive compliance. This means that the contact forces between the robotic arm and the rigid environment are controlled, the developers explain.
Mechanical finger absorbs physical onesimpact and can change its rigidity depending on the task being performed. The device provides an adjustable stiffness function and a very compact design without the weight and complexity of additional drives. The prototype finger developed by the team weighs 480g and is made from an alloy and 3D printed material.
Robotic finger, resistant to external influences. Video: Handong Hu, Yiwei Liu, Zongwu Xie, Jianfeng Yao, Hong Liu
Engineers conducted a series of tests to testthe work of the manipulator. It had to grip objects of various shapes and sizes, and also withstand external influences. The study found that the device was reliable, provided adequate force, and was capable of grasping and manipulating objects.
The authors will continue to work on creating a full-fledged robotic arm with the same properties.
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