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Table 4 Statistics on relative errors reii of main diagonal elements of stiffness matrix

From: Improved Stiffness Modeling for An Exechon-Like Parallel Kinematic Machine (PKM) and Its Application

  Mean Stdev Max Min
re11 2.33 0.85 4.57 0.45
re22 8.82 1.83 14.33 0.82
re33 5.67 0.81 12.99 0.20
re44 1.11 0.05 2.59 0.02
re55 2.35 0.04 4.32 0.19
re66 1.10 0.04 1.62 0.06