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- H-infinity_methods_in_control_theory abstract "H∞ (i.e. "H-infinity") methods are used in control theory to synthesize controllers achieving stabilization with guaranteed performance. To use H∞ methods, a control designer expresses the control problem as a mathematical optimization problem and then finds the controller that solves this optimization. H∞ techniques have the advantage over classical control techniques in that they are readily applicable to problems involving multivariate systems with cross-coupling between channels; disadvantages of H∞ techniques include the level of mathematical understanding needed to apply them successfully and the need for a reasonably good model of the system to be controlled. It is important to keep in mind that the resulting controller is only optimal with respect to the prescribed cost function and does not necessarily represent the best controller in terms of the usual performance measures used to evaluate controllers such as settling time, energy expended, etc. Also, non-linear constraints such as saturation are generally not well-handled. These methods were introduced into control theory in the late 1970's-early 1980'sby George Zames (sensitivity minimization), J. William Helton (broadband matching),and Allen Tannenbaum (gain margin optimization).The phrase H∞ control comes from the name of the mathematical space over which the optimization takes place: H∞ is the space of matrix-valued functions that are analytic and bounded in the open right-half of the complex plane defined by Re(s) > 0; the H∞ norm is the maximum singular value of the function over that space. (This can be interpreted as a maximum gain in any direction and at any frequency; for SISO systems, this is effectively the maximum magnitude of the frequency response.) H∞ techniques can be used to minimize the closed loop impact of a perturbation: depending on the problem formulation, the impact will either be measured in terms of stabilization or performance. Simultaneously optimizing robust performance and robust stabilization is difficult. One method that comes close to achieving this is H∞ loop-shaping, which allows the control designer to apply classical loop-shaping concepts to the multivariable frequency response to get good robust performance, and then optimizes the response near the system bandwidth to achieve good robust stabilization.Commercial software is available to support H∞ controller synthesis.".
- H-infinity_methods_in_control_theory thumbnail H-infty_plant_representation.png?width=300.
- H-infinity_methods_in_control_theory wikiPageExternalLink estimation.
- H-infinity_methods_in_control_theory wikiPageExternalLink R19.pdf.
- H-infinity_methods_in_control_theory wikiPageExternalLink book.
- H-infinity_methods_in_control_theory wikiPageExternalLink 7287085.PDF.
- H-infinity_methods_in_control_theory wikiPageID "314366".
- H-infinity_methods_in_control_theory wikiPageRevisionID "606064711".
- H-infinity_methods_in_control_theory hasPhotoCollection H-infinity_methods_in_control_theory.
- H-infinity_methods_in_control_theory subject Category:Control_theory.
- H-infinity_methods_in_control_theory subject Category:Hardy_spaces.
- H-infinity_methods_in_control_theory type Abstraction100002137.
- H-infinity_methods_in_control_theory type Attribute100024264.
- H-infinity_methods_in_control_theory type HardySpaces.
- H-infinity_methods_in_control_theory type Space100028651.
- H-infinity_methods_in_control_theory comment "H∞ (i.e. "H-infinity") methods are used in control theory to synthesize controllers achieving stabilization with guaranteed performance. To use H∞ methods, a control designer expresses the control problem as a mathematical optimization problem and then finds the controller that solves this optimization.".
- H-infinity_methods_in_control_theory label "H-infinity methods in control theory".
- H-infinity_methods_in_control_theory label "H-nieskończoność".
- H-infinity_methods_in_control_theory label "H-unendlich-Regelung".
- H-infinity_methods_in_control_theory label "Hinfini".
- H-infinity_methods_in_control_theory label "H∞-управление".
- H-infinity_methods_in_control_theory label "H∞制御理論".
- H-infinity_methods_in_control_theory label "تحكم إتش إنفينتي".
- H-infinity_methods_in_control_theory sameAs H-unendlich-Regelung.
- H-infinity_methods_in_control_theory sameAs Hinfini.
- H-infinity_methods_in_control_theory sameAs H∞制御理論.
- H-infinity_methods_in_control_theory sameAs H-nieskończoność.
- H-infinity_methods_in_control_theory sameAs m.01tmwf.
- H-infinity_methods_in_control_theory sameAs Q1293742.
- H-infinity_methods_in_control_theory sameAs Q1293742.
- H-infinity_methods_in_control_theory sameAs H-infinity_methods_in_control_theory.
- H-infinity_methods_in_control_theory wasDerivedFrom H-infinity_methods_in_control_theory?oldid=606064711.
- H-infinity_methods_in_control_theory depiction H-infty_plant_representation.png.
- H-infinity_methods_in_control_theory isPrimaryTopicOf H-infinity_methods_in_control_theory.
