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Read our primer articles on Vibration Analysis and Laser Alignment Tools.

1. Name one use of principal (or normal) coordinates
2. What is meant by orthogonality of normal modes?
3. What is the advantage in using orthonormal modal vectors in the decoupling of equations
of motion?
4. In MDOFS analysis, under what conditions can the coupling due to damping be removed
in the decoupling process?
5. Explain the usefulness of inclined isolators in the design of vibration isolation systems for
rigid bodies having two planes of symmetry?
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