Planar rotation
Let frame B (with unit vectors b1, b2 and b3) rotates with respect to A frame (with unit vectors a1, a2 and a3). Figure 0.3 shows a special case when B rotates about b3 = a3 with angle θ with respect to A.
| (0.2) |
Similarly in the case shown in Fig. 0.4, direction cosine matrix is
| (0.3) |
and in the case shown in Fig. 0.5, direction cosine matrix is
| (0.4) |
Any of these cases are called simple rotation.
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