A precise spindle is essential to achieve precision machining, such as diamond turning. A fluid driven spindle supported by hydrostatic bearings was thus designed and tested. A feature of the spindle is that several flow channels are designed in its rotor so that driving torque can be generated by supplying pressurized flow into the channels. Rotational speed of the spindle can be controlled by the flow rate. In addition, the rotational direction of the spindle can be controlled by switching supply ports. Thus angular position control of the spindle is achieved by designing appropriate feedback controller. In the present paper, mathematical model of the spindle was thus derived in order for designing an angular position control system. Then spindle characteristics calculated by the mathematical model were compared with experimental results. Furthermore, the angular position control system that has a disturbance observer in its feedback loop was designed based on the mathematical model. The performance of the designed control system was experimentally investigated through the step response. Experimental results verified that the designed controller minimizes the steady state error of angular position of the spindle. Consequently, the steady state error was comparable with the resolution of the rotary encoder, 0.018 degree. In particular, the experimental results indicated that the disturbance observer effectively reduced the influence of various load torque on the angular position of the spindle.
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ASME 2009 International Mechanical Engineering Congress and Exposition
November 13–19, 2009
Lake Buena Vista, Florida, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4383-3
PROCEEDINGS PAPER
Angular Position Control of Fluid-Driven Spindle
Yohichi Nakao,
Yohichi Nakao
Kanagawa University, Yokohama, Japan
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Naoya Asaoka
Naoya Asaoka
Kanagawa University, Yokohama, Japan
Search for other works by this author on:
Yohichi Nakao
Kanagawa University, Yokohama, Japan
Naoya Asaoka
Kanagawa University, Yokohama, Japan
Paper No:
IMECE2009-11075, pp. 341-346; 6 pages
Published Online:
July 8, 2010
Citation
Nakao, Y, & Asaoka, N. "Angular Position Control of Fluid-Driven Spindle." Proceedings of the ASME 2009 International Mechanical Engineering Congress and Exposition. Volume 10: Mechanical Systems and Control, Parts A and B. Lake Buena Vista, Florida, USA. November 13–19, 2009. pp. 341-346. ASME. https://doi.org/10.1115/IMECE2009-11075
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