In this brief, we introduce a 'bandwidth-on-demand' variable-gain control (VGC) strategy that allows for a varying bandwidth of the feedback controller. The proposed VGC can achieve improved performance given time-varying, reference-dependent performance requirements compared with linear time-invariant (LTI) control suffering from design tradeoffs between low-frequency tracking performance and sensitivity to higher-frequency disturbances. The VGC consists of frequency-domain loop-shaped linear filters and a variable-gain element, which depends on reference information. We present easy-to-use controller design guidelines and data-based frequency-domain conditions to verify stability and convergence of the closed-loop system. Moreover, the ability of the 'bandwidth-on-demand' controller to outperform LTI controllers is emphasized through experiments on an industrial nanopositioning motion stage.
Bandwidth-on-demand motion control
2018-01-01
Van Loon , S J L M , Hunnekens , B G B , Simon , A S , van de Wouw , N & Heemels , W P M H 2018 , ' Bandwidth-on-demand motion control ' , IEEE Transactions on Control Systems Technology , vol. 26 , no. 1 , 7845643 , pp. 265-273 . https://doi.org/10.1109/TCST.2017.2658192
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC: | 629 |
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