A magnetostrictive actuator offers a long mechanical strain output in a broad bandwidth at a cost of a highly nonlinear magnetic hysteresis. Full utilization of this actuator in precision manufacturing requires a feedback loop as well as an advanced control scheme. A robust control scheme using sliding mode control with a variable switching gain was tailored to the nonlinear transducer. Nominal feedforward current controller that drives the magnetostriction was based on the inverse anhysteresis model. An additional switching gain based on the Lyapunov stability condition is implemented to restrain uncertainties. Compared to a traditional closed-loop control design, the proposed algorithm experimentally showed a greatly enhanced performance.
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Modeling and Control of a Magnetostrictive Tool Servo System
Witoon Panusittikorn,
Witoon Panusittikorn
Graduate Student
Department of Mechanical and Aerospace Engineering, Precision Engineering Center,
North Carolina State University
, Raleigh, NC 27695
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Paul I. Ro
Paul I. Ro
Professor
Department of Mechanical and Aerospace Engineering, Precision Engineering Center,
North Carolina State University
, Raleigh, NC 27695
Search for other works by this author on:
Witoon Panusittikorn
Graduate Student
Department of Mechanical and Aerospace Engineering, Precision Engineering Center,
North Carolina State University
, Raleigh, NC 27695
Paul I. Ro
Professor
Department of Mechanical and Aerospace Engineering, Precision Engineering Center,
North Carolina State University
, Raleigh, NC 27695J. Dyn. Sys., Meas., Control. May 2008, 130(3): 031003 (11 pages)
Published Online: April 9, 2008
Article history
Received:
November 20, 2003
Revised:
September 7, 2007
Published:
April 9, 2008
Citation
Panusittikorn, W., and Ro, P. I. (April 9, 2008). "Modeling and Control of a Magnetostrictive Tool Servo System." ASME. J. Dyn. Sys., Meas., Control. May 2008; 130(3): 031003. https://doi.org/10.1115/1.2837432
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