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Multimodel control of nonlinear systems: An improved gap metric and stability margin-based method

Ahmadi, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1115/1.4039086
  3. Publisher: American Society of Mechanical Engineers (ASME) , 2018
  4. Abstract:
  5. This paper presents a new multimodel controller design approach incorporating stability and performance criteria. The gap metric is employed to measure the distance between local models. An efficient method based on state feedback strategy is introduced to improve the maximum stability margin of the local models. The proposed method avoids local model redundancy, simplifies the multimodel controller structure, and supports employing of many linear control techniques, while does not rely on a priori experience to choose the gridding threshold value. To evaluate the proposed method, three benchmark nonlinear systems are studied. Simulation results demonstrate that the method provides the closed-loop stability and performance via a simple multimodel structure in comparison with the opponents. © 2018 by ASME
  6. Keywords:
  7. Gap metric ; Multimodel ; Stability margin ; State feedback strategy ; Controllers ; Feedback control ; Linear control systems ; Nonlinear systems ; Stability criteria ; State feedback ; Closed loop stability ; Feedback strategies ; Gap metrics ; Multi-model ; Multi-model control ; Multi-model controller ; Performance criterion ; Stability margins ; System stability
  8. Source: Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME ; Volume 140, Issue 8 , 2018 ; 00220434 (ISSN)
  9. URL: http://dynamicsystems.asmedigitalcollection.asme.org/article.aspx?articleid=2670678