Brief H∞ controller reduction for nonlinear systems

  • Authors:
  • Chee-Fai Yung;He-Sheng Wang

  • Affiliations:
  • Department of Electrical Engineering, National Taiwan Ocean University, Keelung 202, Taiwan;Center for Aviation and Space Technology, Bldg. 52, 195-12 Sec. 4, Chung Hsing Rd. Chutung, Hsinchu 310, Taiwan

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2001

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Abstract

Sufficient conditions are proposed for the existence of reduced-order (fixed-order) controllers solving the standard nonlinear H^~ output feedback control problem. State-space formulas for such reduced-order H^~ controllers are also derived in terms of the solutions of two Hamilton-Jacobi inequalities. The development uses only elementary concepts of dissipativity and differential game, thus the proofs given are simple and clear.