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Table 3 Correction effect meii of correction coefficient cpii on main diagonal elements of stiffness matrix

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

 

Correction effect

Mean

Stdev

Max

Min

Distribution

[0.9, 1]

[0.6, 0.9)

[0, 0.6)

Orthogonal experiment

me11

0.96

0.01

0.98

0.95

49

0

0

me22

0.90

0.12

1.00

0.53

36

12

1

me33

0.98

0.01

1.00

0.97

49

0

0

me44

1.00

0.00

1.00

1.00

49

0

0

me55

1.00

0.00

1.00

1.00

49

0

0

me66

1.00

0.00

1.00

0.99

49

0

0

Verification experiment

me11

0.83

0.12

1.00

0.37

3

20

2

me22

0.69

0.16

0.91

0.32

1

18

6

me33

0.68

0.07

0.73

0.44

0

23

2

me44

0.99

0.00

1.00

0.99

25

0

0

me55

0.99

0.00

0.99

0.98

25

0

0

me66

0.93

0.02

0.98

0.86

24

1

0