This paper is devoted to the development of an advanced controller for a maglev artificial heart: in particular, a magnetically levitated left ventricular assist device is studied and the disturbances from the natural heart are taken into account. The main goal is to define a control action able to reject dc as well as periodical disturbances from the control input in steady state. This is accomplished by exploiting the intrinsic instability of the system. The paper presents a couple of approaches for solving the problem: an internal model based approach and a solution based on adaptive observers. The internal model based solution relies on the knowledge of the frequencies of the sinusoidal disturbances affecting the system: this hypothesis is not far from the reality of the maglev apparatus as the shape and frequency of the quasiperiodic disturbance can be known with the addition of sensors. The design methodology based on the use of adaptive observers does not require the perfect knowledge of the frequencies of sinusoidal disturbances as an adaptive mechanism is presented to estimate them.
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e-mail: l.gentili@unibo.it
e-mail: lmarconi@deis.unibo.it
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January 2008
Research Papers
Disturbance Rejection in the Control of a Maglev Artificial Heart
Luca Gentili,
Luca Gentili
CASY-DEIS,
e-mail: l.gentili@unibo.it
University of Bologna
, Via Risorgimento 2, 40136, Bologna, Italy
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Lorenzo Marconi,
Lorenzo Marconi
CASY-DEIS,
e-mail: lmarconi@deis.unibo.it
University of Bologna
, Via Risorgimento 2, 40136, Bologna, Italy
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Brad Paden
Brad Paden
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Luca Gentili
CASY-DEIS,
University of Bologna
, Via Risorgimento 2, 40136, Bologna, Italye-mail: l.gentili@unibo.it
Lorenzo Marconi
CASY-DEIS,
University of Bologna
, Via Risorgimento 2, 40136, Bologna, Italye-mail: lmarconi@deis.unibo.it
Brad Paden
J. Dyn. Sys., Meas., Control. Jan 2008, 130(1): 011003 (10 pages)
Published Online: December 5, 2007
Article history
Received:
February 6, 2006
Revised:
May 23, 2007
Published:
December 5, 2007
Citation
Gentili, L., Marconi, L., and Paden, B. (December 5, 2007). "Disturbance Rejection in the Control of a Maglev Artificial Heart." ASME. J. Dyn. Sys., Meas., Control. January 2008; 130(1): 011003. https://doi.org/10.1115/1.2807066
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