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This paper presents some personal reflections on the field of automatic control, its emergence, development, and its future. The assessment is that automatic control has been very successful, but that we now are at a crossroad, where we have to decide if we want to take an holistic view with full systems responsibility or if we want to fractionate into a collection of subspecialities.
This paper describes a recent approach to the problem of output regulation of nonlinear systems, which unifies and extends a number of earlier results on the subject. In particular the approach in question yields necessary and sufficient conditions for local structurally stable regulation and, for special classes of nonlinear systems, also semiglobal robust regulation.
A method based on conceptual tools of predictive control is described for solving tracking problems wherein pointwise-in-time input and/or state inequality constraints are present. It consists of adding to a primal compensated system a nonlinear device called command governor (CG) whose action is based on the current state, set-point and prescribed constraints. The CG selects at any time a virtual...
The aim of this lecture is to present some well-known and some new results in multivariable regulation in a strictly geometric framework, each compared with the corresponding single-variable result approached with the standard transfer function techniques. It consists of three parts, each necessary for a clear presentation of the subsequent one: a selection of the basic tools, a survey of the solution...
With reference to automatic control, the lecture will analyse the current state of engineering methods available for industrial applications, the principal needs demanding for more systematic and reliable design methods and the lines along which engineering reserch moves to meet such demands. Two different aspects of innovation are considered: the development of new products enhancing the capability...
Variable Structure Control is a switching feedback control which provides a simple tool for coping with uncertain nonlinear plants. The computer technology and high-speed switching circuitry have made the implementation of VSC of increasing interest to control engineers. The control action is used in order to maintain the system state trajectory on a prescribed sliding surface. However, because of...
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