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In particular, the combination of passive linkage mechanisms and small wheels is a main research trend because standard wheeled mobile mechanisms find it difficult to move on rough terrain.
The 5-TET realizes locomotion and manipulation functions by deformation, and the CM of the mechanism frequently changed by driving actuators, so that the energy and locomotion efficiency may be lower than that of traditional mobile mechanisms, such as wheeled and tracked robots.
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The tetrahedron-based mobile mechanism has been commonly explored.
Locomotion and manipulation optimization is essential for the performance of tetrahedron-based mobile mechanism.
For mobile mechanism, it is meaningful to find the optimal input of the required locomotion.
However, the research on successive path planning of such linkage-based mobile mechanism is relatively rare.
Tetrahedron-based mobile mechanism is a class of hyper-redundant robots, which has multiple DOFs and kinematic redundancy [5].
In this paper, we focused mainly on the locomotion optimization and manipulation planning of the tetrahedron-based mobile mechanism constructed as 5-TET.
A wheeled mobile mechanism with a passive and/or active linkage mechanism for travel in rough terrain is developed and evaluated.
Dubbed MKR-003 [JP], his main selling point is the built-in "omni-directional mobile mechanism" that allows him to move anywhere, on four wheels, and all by himself (to some extent).
Mechanically, substituting prismatic joints for each of the 18 struts and using spherical joints connect the struts end to end, which make up the 5-TET mobile mechanism with 18 DOFs, corresponding to each of the 18 prismatic actuators (see in Figure 1).
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