Frequency Domain System Identification

  • Ioannis A. RaptisEmail author
  • Kimon P. Valavanis
Part of the Intelligent Systems, Control and Automation: Science and Engineering book series (ISCA, volume 45)


Any helicopter flight controller design requires knowledge of a mathematical model that accurately describes the dynamic behavior of the helicopter. This mathematical model is represented by a set of ordinary differential equations. Establishing such a model for helicopters is a challenging task. This Chapter provides a thorough description of a frequency domain identification procedure for the extraction of linear models that correspond to certain operating conditions of the helicopter. The discussed methodology was initially presented in (Tischler and Remple in Aircraft and Rotorcraft System Identification, AIAA Education Series, AIAA, Washington, 2006) and it has been successfully applied for a small-scale helicopter in the work reported in (Mettler in Identification Modeling and Characteristics of Miniature Rotorcraft, Kluwer Academic Publishers, Norwell, 2003). The frequency domain identification procedure is evaluated for an experimental small-scale Radio Controlled (RC) Raptor 90 SE helicopter using the X-plane flight simulator. The Raptor 90 SE helicopter has also been used for the evaluation and comparison of the several controller designs and identification methods that are presented in this book.


State Space Model Coherence Function Excitation Signal Main Rotor Flight Data 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Department of Electrical and Computer EngineeringGeorgia Institute of TechnologyAtlantaUSA
  2. 2.Department of Electrical and Computer Engineering, and, Department of Computer Science, School of Engineering and Computer ScienceUniversity of DenverDenverUSA

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