Optimal preview-based stable-inversion for output tracking of nonminimum-phase linear systems

Research output: Contribution to journalArticlepeer-review

71 Scopus citations


In this article, a new approach to output tracking of nonminimum-phase systems is proposed. The proposed technique extends the preview-based stable-inversion method to optimally utilize finite-preview (in time) of the future desired output trajectory to find the feedforward input (called the inverse input) for achieving precision output tracking for nonminimum-phase systems. It has been shown that having a large enough preview time is critical to ensure the precision in the preview-based output tracking. The available preview time, however, can be limited due to the physical constraints, and more generally, the associated cost and/or hardware limits. Therefore, we propose obtaining the optimal preview-based inverse input by minimizing, within the preview time window, the predicted tracking error (under the preview-based inverse input) relative to the input energy. A simulation study on a piezoelectric actuator model is used to illustrate the proposed technique.

Original languageEnglish (US)
Pages (from-to)230-237
Number of pages8
Issue number1
StatePublished - Jan 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


  • Nonminimum-phase systems
  • Optimal control
  • Output tracking
  • Preview-based approach
  • Stable-inversion


Dive into the research topics of 'Optimal preview-based stable-inversion for output tracking of nonminimum-phase linear systems'. Together they form a unique fingerprint.

Cite this