Bandwidth-on-demand motion control

S.J.L.M. Van Loon, B.G.B. Hunnekens, A.S. Simon, N. van de Wouw, W.P.M.H. Heemels

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
1 Downloads (Pure)


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.

Original languageEnglish
Article number7845643
Pages (from-to)265-273
Number of pages9
JournalIEEE Transactions on Control Systems Technology
Issue number1
Publication statusPublished - 1 Jan 2018


  • Control design tradeoffs
  • frequency-domain
  • industrial application
  • motion control
  • variable-gain control (VGC)


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