The system applies magnetic levitation as the payload support mechanism, which realises inherent quasi-zero stiffness levitation in the vertical direction, and zero stiffness in the other five dofs.
Prior research using 7-axis vertical articulated robots [8] proposed an impedance controller that is configured with zero stiffness in translations and high stiffness in the rotations.
While providing near zero stiffness in multiple dofs, the design is also able to generate static magnetic forces to support the payload weight.
While the cloth simulation is normally used for blankets, clothing, and curtains, using the zero stiffness settings (also outlined in the video) creates the same effect as crunching metal.
In order to confirm that the stiffness was still primarily increased in the direction of the instability of the environment, the ratio of the stiffness increases in the two stiffness terms were compared.
In experimental study, we measure two stiffness changing points and their coordinate shift between two cases (without/with target proteins).
Polymers are repetitive macromolecular structures that are usually distinguished in three differing stiffness regimes: flexible, semiflexible, and stiff.
However, in 3-D, the stiffness below which cells do not assemble stress fibers was shown here to be much higher, and hence PDMS was well suited for this study since the soft PDMS (20 kPa) did stimulate actin filament assembly on flat, 2-D surfaces but not in 3-D microwells (Fig. 3).
The bending stiffness threshold as well as the two in-plane stiffness thresholds divide the bending stiffness behavior of CNT films into four stages, which is described by a simple piecewise analytical expression based on the energy theorems and superposition method.
Comparing the performance of each configuration showed a two fold increase in stiffness and strength as a result of bonding between the concrete core and GFRP tube.
