From: Non-iterative geometric approach for inverse kinematics of redundant lead-module in a radiosurgical snake-like robot
n
Link id
Link length (a), (mm)
Twist angle (∝), (rad)
Link offset (d)
Joint angle (θ)
1
53.12
π/2
0
θ 1
2
11
−π/2
θ 2
3
θ 3
4
θ 4
…
2n
θ 2n