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. 2016 Jun 3;16(6):819. doi: 10.3390/s16060819

Figure 2.

Figure 2

Principle of operation for sensing normal and shear forces in the tactile unit. (a) Reference coordinates; (b) response to normal force; (c) response to shear force in the x-axis direction; and (d) response to shear force in the y-axis direction.