Publications

@inproceedings{C19d,

title = {Multivariable Model-less Feedforward Control of a Monolithic Nanopositioning Stage With FIR Filter Inversion},

author = {M. Omidbeike and A. A. Eielsen and Y. K. Yong and A. J. Fleming },

url = {https://www.precisionmechatronicslab.com/wp-content/uploads/2021/02/C19d.pdf},

doi = {10.1109/MARSS.2019.8860974},

issn = {978-1-7281-0948-0},

year  = {2019},

date = {2019-07-02},

booktitle = {International Conference on Manipulation, Automation and Robotics at Small Scales (MARSS)},

address = {Helsinki, Finland},

abstract = {A model-less approach for inversion of the dynamics of multivariable systems using FIR filters is described. Inversion-based feedforward techniques have been widely used in the literature to achieve high-performance output tracking. The foremost difficulties associated with plant inversions are model uncertainties and non-minimum phase zeros. Various model-based methods have been proposed to exclude nonminimum phase zeros when inverting both single-input and single-output (SISO), and multiple-input and multiple-output (MIMO) systems. However, these methods increase the model uncertainty as they are no longer exact. To overcome these difficulties a model-less approach using FIR filters is presented. The results when applying the feedforward FIR filter to a multivariable nanopositioning system is presented, and they demonstrate the effectiveness of the feedforward technique in reducing the cross-coupling and achieving significantly improved output tracking.},

keywords = {Nanopositioning, Tracking Control, Vibration Control},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{omidbeike2019axis},

title = {A Five-Axis Monolithic Nanopositioning Stage Constructed from a Bimorph Piezoelectric Sheet},

author = {M. Omidbeike and Y. K. Yong and S. I. Moore and A. J. Fleming 

},

url = {https://www.precisionmechatronicslab.com/wp-content/uploads/2021/02/C19a.pdf},

doi = {10.1109/MARSS.2019.8860940},

issn = {978-1-7281-0948-0},

year  = {2019},

date = {2019-07-02},

urldate = {2019-07-02},

booktitle = {International Conference on Manipulation, Automation and Robotics at Small Scales },

journal = {Int. Conference on Manipulation, Automation and Robotics at Small Scales (MARSS)},

address = {Helsinki, Finland},

abstract = {The paper describes design, modeling and control of a five-axis monolithic nanopositioning stage constructed from a bimorph piezoelectric sheet. In this design, actuators are created by removing parts of the sheet using ultrasonic machining. The constructed nanopositioner is ultra-compact with a thickness of 1 mm. It has a X and Y travel range of 15.5 µm and 13.2 µm respectively; a Z travel range of 26 µm; and a rotational motion about the X-and Y-axis of 600 µrad and 884 µrad respectively. The first resonance frequency occurs at 883 Hz in the Z-axis, and the second and third resonance frequency appears at 1850 Hz, rotating about the X-and Y-axis. A decentralized control strategy is implemented to track Z, θx and θy motions. The controller provides good tracking and significantly reduces cross-coupling motions among the three degrees-of-freedom.},

keywords = {Nanopositioning, Smart Structures, Tracking Control},

pubstate = {published},

tppubtype = {inproceedings}

}