Table 7 Joint position Sequence.

From: Obstacle-avoidance trajectory planning method for excavators in confined spaces based on improved RRT* algorithm

Bucket position(x,y,z)

θ1(°)

θ2(°)

θ3(°)

θ4(°)

(4.000, 0, −0.720)

0

21.98

−97.56

−11.07

(3.103, 0, −1.905)

0

5.89

−95.01

−18.54

(2.693, 0, −1.503)

0

−4.62

−94.30

−30.64

(2.726, 0, −0.743)

0

−4.62

−94.25

−61.10

(2.694, 0, −0.402)

0

14.85

−108.12

−74.68

(1.163, −1.155, 0.826)

−0.17

36.02

−104.33

−74.68

(0.842, −2.531, 1.142)

−47.66

49.15

−102.71

−74.68

(0.901, −3.562, 1.457)

−77.66

51.63

−101.09

−74.68