Download Nonlinear Synthesis: Proceedings of a IIASA Workshop held in by A. A. Agrachev, S. A. Vakhrameev (auth.), Christopher I. PDF

By A. A. Agrachev, S. A. Vakhrameev (auth.), Christopher I. Byrnes, Alexander B. Kurzhansky (eds.)

In its broadest feel, nonlinear synthesis comprises in truth the synthesis of occasionally so­ phisticated or complicated keep watch over thoughts with the purpose of prescribing, or a minimum of influencing, the evolution of advanced nonlinear structures. Nonlinear synthesis calls for the advance of methodologies for modeling advanced platforms, for the research of nonlinear versions, and for the systematic layout of keep an eye on schemes or suggestions legislation that may in attaining a wide selection of prescribed targets. The modeling, research and keep an eye on of complicated platforms within the face of uncertainty shape on of the most important elements of the present examine application within the division of structures and determination Sciences (SDS) on the overseas Institute for utilized platforms research (IIASA). In June 1989, a IIASA workshop on Nonlinear Synthesis, backed through SDS, used to be held in Sopron, Hungary. we're proud to give this quantity because the lawsuits of this workshop, a workshop attened by way of trendy researchers in nonlinear platforms from either the East and the West. because the merchandising and encouragement of medical cooperation among researchers within the East and within the West is without doubt one of the objectives at IIASA, we suppose the Sopron convention on Nonlinear Synthesis was once very winning. in addition, we have been particularly happy via the striking new advances awarded on the workshop which, during this quantity, at the moment are a part of the convention record.

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Extra info for Nonlinear Synthesis: Proceedings of a IIASA Workshop held in Sopron, Hungary June 1989

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In particular it will follow that (B3) is necessary and sufficient for CO stabilization. We will give some sufficient conditions for Cl stabilizability and Coo stabilizability. e. f(x) is a homogeneous polynomial vector field and g(x) is a constant vector. 2 Stabilization of two dimensional systems In this section we will review some of our recent work on the stabilization problem for two dimensional systems. Throughout we will assume that the system is real analytic. 3) where f(O) = OJ Xl, xa E lR, u E lR and f is real analytic.

In section 5, we survey the geometric existence theory for the regulator equations, Research partially supported by grants from the AFOSR, the NSF and MURST SHAPING THE RESPONSE OF A NONLINEAR SYSTEM 35 giving necessary and sufficient conditions for nonlinear regulation in terms of the zero dynamics of the system to be controlled and of the augmented system including the exogeneous system producing reference outputs and disturbances. This characterization can also be cast in terms of the solvability of a more intrinsic "Lyapunov POE", for which stable, unstable and center manifold theory provides a local existence theory.

One typical example is a van der Pol BYRNES AND ISIDORI 42 oscillator with a stable limit cycle, namely the system Wl = W2 = W2 -Wl + c(W2 - w~) with c > O. This system cannot be immediately treated by means of the methods illustrated in Section 2, because its Jacobian matrix has eigenvalues in the right-half plane. However, one can consider the parameter c as an additional state variable satisfying i=O thus obtaining, for the augmented exosystem, a Jacobian matrix with all eigenvalues on the imaginary axis at the augmented equilibrium (w, c) = (0,0).

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