Title :
Research of speed ripple reduction method for computed tomography
Author :
Lee, K.W. ; Park, J.W. ; Kwon, Y.A.
Author_Institution :
Mechatronics Group, Korea Electrotechnol. Res. Inst., Changwon, South Korea
Abstract :
This paper presents a study on the high performance speed control of permanent magnet synchronous motor for a computed tomography (CT). In a CT system, many units are attached on the rotational part of the gantry, such as x-ray tube, detector, collimator, and data acquisition system. Therefore, it is difficult to balance many components of different weights; this is inevitable problem in CT systems. To reduce speed ripple caused by eccentricity, this study proposed modified adaptive eccentricity compensator (modified AEC) and verified its validity by comparing it with load torque observer (LTO).
Keywords :
angular velocity control; compensation; computerised tomography; machine control; observers; permanent magnet motors; synchronous motors; CT; adaptive eccentricity compensator; collimator; computed tomography; data acquisition system; detector; eccentricity; load torque observer; permanent magnet synchronous motor; speed control; speed ripple reduction method; x-ray tube; Collimators; Computed tomography; Data acquisition; Equations; Observers; State estimation; Torque; X-ray detection; X-ray detectors; X-ray imaging;
Conference_Titel :
Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE
Print_ISBN :
0-7803-8730-9
DOI :
10.1109/IECON.2004.1432126
