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Robust output feedback trajectory tracking control of an electrodynamic planar motion stage for precision positioning

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4 Author(s)
Treichel, K. ; Control Eng. Group, Tech. Univ. Ilmenau, Ilmenau, Germany ; Al Azrak, R. ; Reger, J. ; Wulff, K.

The contribution addresses the problem of robust trajectory tracking control and disturbance rejection for a non contact, high-precision Lorentz force planar motion stage of linear DC brushless type. The control problem is accomplished by using a composite control law including a simple computed torque type controller together with an extended Luenberger type of state and disturbance observer also known as extended state or generalized proportional integral observer (GESO/GPIO). We provide stability proofs and estimation error bounds of the GESO/GPIO related to the choice of the eigenvalues of the observer estimation error dynamics. Finally, we assess the performance of the proposed controller on the basis of a recently developed motion stage model that comprises a realistic disturbance modeling and thus is capable of reflecting the major challenges for control.

Published in:

Methods and Models in Automation and Robotics (MMAR), 2013 18th International Conference on

Date of Conference:

26-29 Aug. 2013

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