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Euler Angles
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Three Angles A rotation matrix can be described with three free parameters. Select three separate rotations about body axesSelect three separate rotations about body axes 1) Rotation of about e 3 axis. 2) Rotation of about e 1 axis. 3) Rotation of about e 3 axis. These are the Euler angles. e1e1 e2e2 e3e3
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Euler Matrices Any vector z can be rotated though the Euler angles. Equivalent matrix operation is the product of three separate operations.
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Full Rotation Any rotation is then expressed with the three angles.
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Matching Terms The terms in the matrix correspond to the components of the angular velocity vector. The relationship between angular velocity and Euler angles comes from the S matrix.
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Body Frame The angular velocity in the body frame can be expressed in terms of Euler angles. x1x1 x2x2 x3x3
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