Download e-book for iPad: Analysis and Control of Nonlinear Systems: A Flatness-based by Jean Levine

By Jean Levine

ISBN-10: 3642008380

ISBN-13: 9783642008382

This is the 1st ebook on a scorching subject within the box of keep an eye on of nonlinear platforms. It levels from mathematical method idea to sensible commercial regulate functions and addresses primary questions in structures and regulate: find out how to plan the movement of a method and song the corresponding trajectory in presence of perturbations. It emphasizes on structural features and particularly on a category of platforms referred to as differentially flat.

Part 1 discusses the mathematical concept and half 2 outlines functions of this technique within the fields of electrical drives (DC automobiles and linear synchronous motors), magnetic bearings, automobile equipments, cranes, and automated flight regulate systems.

The writer deals web-based movies illustrating a few dynamical features and case experiences in simulation (Scilab and Matlab).

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Additional info for Analysis and Control of Nonlinear Systems: A Flatness-based Approach

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Proof. We only sketch the simplest parts of the proof, namely those concerning the necessary condition and the second part of the Theorem. For the sufficiency part, the interested reader may refer to Choquet-Bruhat [1968]. 29) is completely integrable, there exists r lor cally independent first integrals y1 , . . , yr such that ωi = j=1 ai,j dyj and r conversely dyj = i=1 bj,i ωi . 29) is algebraically equivalent to its closure and is thus closed. Concerning the second part, if the system is completely integrable, it admits r locally independent first integrals y1 , .

K, j = 1, . . , p, with {γ1 , . . , γk } a regular basis of D and δi,j the Kronecker symbol. Therefore, this method only applies in practice if we know a particular basis of D for which the expression of the diffeomorphism is simpler. There also exists other constructive methods as the method of bicharacteristics. , in Arnold [1974, 1980] . 14. 13, generated by g1 = ∂x and g2 = ∂x + x1 ∂x . 1 2 3 This distribution being non involutive, the set of first order partial differential equations ∂y ∂y ∂y = 0, + x1 =0 ∂x1 ∂x2 ∂x3 is equivalent to ∂y = 0, ∂x1 ∂y = 0, ∂x2 ∂y = 0, ∂x3 which means that y(x1 , x2 , x3 ) = y0 with y0 arbitrary constant.

13. (Non Involutive Distribution) Consider the distribution D ∂ ∂ ∂ ∂ in TR3 generated by g1 = ∂x and g2 = ∂x + x1 ∂x . Clearly, [g1 , g2 ] = ∂x . 1 2 3 3 The three vectors g1 , g2 and [g1 , g2 ] are linearly independent, which proves that D is non involutive. Its involutive closure D is equal to TR3 . 8 Integral Manifolds We now address the following problem: “Given a regular distribution D with constant rank k, to which condition does there exist a diffeomorphism ξ = ϕ(x) such that, in the ξ-coordinates, the image distribution ϕ∗ D is given by ϕ∗ D = span ∂ξ∂1 , .

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Analysis and Control of Nonlinear Systems: A Flatness-based Approach by Jean Levine


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