Analytical formulation to compute QFT bounds: the envelope method
This paper describes an analytical formulation to compute quantitative feedback theory (QFT) bounds in one-degree-offreedom feedback control problems. The new approach is based on envelope curves and shows that a QFT control specification can be expressed as a family of circumferences. Then, the con...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Universidad de La Rioja (UR) |
| Repositorio: | RIUR. Repositorio Institucional de la Universidad de La Rioja |
| OAI Identifier: | oai:portal.dialnet.es:doc/5bbc6911b750603269e8148e |
| Acceso en línea: | https://investigacion.unirioja.es/documentos/5bbc6911b750603269e8148e |
| Access Level: | acceso abierto |
| Palabra clave: | Quantitative feedback theory (QFT) Robust control Uncertain systems |
| Sumario: | This paper describes an analytical formulation to compute quantitative feedback theory (QFT) bounds in one-degree-offreedom feedback control problems. The new approach is based on envelope curves and shows that a QFT control specification can be expressed as a family of circumferences. Then, the controller bound is defined by the envelope curve of this family and can be obtained as an analytical function. This offers the possibility of studying the QFT bounds in an analytical way with several useful properties. Gridding methods are avoided, resulting in a lower computational effort procedure. The new formulation improves the accuracy of previous methods and allows the designer to calculate multivalued bounds. © 2008 John Wiley & Sons, Ltd. |
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