Abstract

The algebra of rotations of a vector, a portion of the Theory of Conjugate Surfaces, which includes the algebra for the combination and sequence-reciprocation of two successive rotations, and the algebra for the resolution of a given rotation into three component-rotations, is introduced. Its applications in the kinematical analysis of a nR mP robot and in the derivation of the closed-form solution for conventional 6R and 5R robots, are illustrated. A new concept, the work-attitude of the end-effector of a robot with its base-point being fixed at an assigned point, is proposed, and is discussed for cases of conventional 6R and 5R robots with use of the algebra of rotations.

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