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Discrete (two-state) modular hyper-redundant planar manipulator

Zawidzka Ela, Zawidzki Machi

Computer Assisted Methods in Engineering and Science

2022

Vol. 29, no. 4

397--407

This paper presents a concept of an extremely simple planar manipulator composed of 24 congruent modules. Each module has only two possible discrete positions in relation to the previous module: left (-π/6) or right (π/6). However, despite its conceptual simplicity, this manipulator can perform relatively demanding tasks, for example as an inspection device. The manipulator is placed in an experimental environment, and the goal is to place its tip in close proximity to five given points without collisions. Despite the constraints of its motion, the manipulator effectively “crawls” inside the working space and visits assigned points. The control of the manipulator is executed by manual placing to desired configurations and interpolating the intermediate transitions. The preliminary results are promising and show that for certain practical types of tasks, the functionality and precision of this extremely simple manipulator could be sufficient, e.g., visual inspection, provision of survival supplies, placing of explosives, etc.

Design of a Motion System for 3D Printed Snakebot

Mateja Krzysztof, Panfil Wawrzyniec

Technical Sciences / University of Warmia and Mazury in Olsztyn

2021

nr 24(1)

57--66

This article presents the results of work related to design, analysis and selection of the electric motors, servos and elements of motion system for 3D printed snakebot. Electric motors and servos had to meet a number of requirements like dimensions, torque, RPM. The drivetrain allowed to drive the snakebot and rotate system allowed to torsional movement between adjacent robot modules. CAD model and analysis allowed to select the proper elements of drivetrain and rotate system. We built test stands and after verification we built the prototype. Next step after building the robot was to carry out tests to verify the mobility of the snake robot. We checked, among others, movement of servos in different planes, snakebot speed, driving at angle (up and down).