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Jack H

12.2.1 Denavit-Hartenberg Transformation (D-H)

Designed as more specialized transforms for robots (based on homogenous transforms)

Zi-1 axis along motion of ith joint

Xi axis normal to Zi-1 axis, and points away from it.

Basic transform is,

1.rotate about Zi-1 by thetai (joint angle)

2.translate along Zi-1 by di (link offset)

3.translate along Xi by ai (link length)

4.rotate about Xi by alphai (link twist)