A polytopic approach for the nonlinear unknown input functional observers design: Application to a quadrotor aerial robots landing
Summary (1 min read)
Summary
- This paper considers a method of designing functional observers for continuous time nonlinear systems subject to unknown inputs.
- The proposed approach consists in rewriting the nonlinear model in a polytopic form (also known as multiple or Takagi-Sugeno models) applying the Sector Nonlinearity Transformation (SNT) and then apply the proposed algorithm for the observer design.
- Sufficient conditions for the asymptotic stability of the estimation error are given in terms of linear matrix inequalities (LMIs) and rank conditions.
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1,099 citations
"A polytopic approach for the nonlin..." refers background in this paper
...The polytopic Takagi-Sugeno (T-S) or Multiple Models (MM) decomposition is another appealing alternative solution to deal with nonlinear systems and to obtain the equivalent representation by a compact set of linear state space models with nonlinear weighting functions satisfying the convex sum property [23], [24], and [28]....
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780 citations
"A polytopic approach for the nonlin..." refers methods in this paper
...Thanks to the convexity of the weighting functions and to the linearity of the subsystems defining the vertices, some results can be established for nonlinear systems [7], [12], [17] using tools borrowed from the linear theory [18], [9]....
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475 citations
"A polytopic approach for the nonlin..." refers methods in this paper
...One solution is to transform the system model into a canonical form [3], which may be a hard assumption to satisfy in many applications [5]....
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398 citations
384 citations
"A polytopic approach for the nonlin..." refers background in this paper
...) acts like an unstructured vanishing perturbation assumed to be bounded (see [ [2]], [ [6]] and references therein) and its effect can be minimized....
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