Instability phenomena of the rotor (2nd report).

Details Instability phenomena of the rotor (2nd report). Instability phenomena of the rotor (2nd report).

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998rnaoj...3..117i&link_type=abstract

Rep. Natl. Astron. Obs. Jpn., Vol. 3, No. 4, p. 117 - 133

Computer Science

Performance

Telescopes: Vibrations

Scientific paper

A periodic vibration in angular velocity of the rotating axes of a telescope is investigated. The vibration showed a sawtooth-like distorted wave form. In order to investigate the cause of the vibration, the authors measured the run-out of the axes, and then disassembled the system and tested the parts separately. As a result it is found that the observed phenomena can be caused by coupling between torsion and bending in the rotating axes. The measurements are satisfactorily explained in the framework of a non-linear system of the elastic deformation of the rotating axes. Finally the authors suggest possible ways of improving the performance of the system.

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