A drillstring used for the drilling of oil or gas wells behaves as a rotating torsional pendulum. The drillstring is rotated at a constant angular velocity by an electric motor, but exhibits superimposed torsional vibrations caused by a non-linear relationship between torque and angular velocity at
Active Vibration Isolation Of Self-excited Mechanical Structures
โ Scribed by S.V. Kravchenko
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 468 KB
- Volume
- 178
- Category
- Article
- ISSN
- 0022-460X
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
This paper describes the implementation of an independent two-channel controller based on absolute velocity feedback and its performance in improving the isolation from base vibration of a mounted rigid equipment structure characterized by two-degrees of freedom. A single-channel controller is also
Numerical and experimental investigations on active vibration isolation system are presented in this paper. Two con"gurations are implemented for a statically balanced three-mount system. To reduce the in#uence of payload dynamics and coupling among the control actuators, intermediate masses are add