Browsing by Author "Saldías Molina, Hernaldo Enrique"
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- ItemAplicación de control predictivo a filtro activo paralelo multinivel.(2013) Saldías Molina, Hernaldo Enrique; Dixon Rojas, Juan; Pontificia Universidad Católica de Chile. Escuela de IngenieríaEl objetivo de este documento es mostrar el diseño e implementación de un filtro activo de nueve niveles controlado por medio de un esquema de control llamado Control Predictivo con Estados Finitos. Este método de control se basa en escoger la mejor combinación de variables (manipuladas) con el fin de optimizar una función de costos (la que depende de variables de desempeño del sistema), aprovechando la naturaleza discreta del inversor. Las ventajas de este método de control radican en su simplicidad, dado que es muy fácil de entender, es fácil de ajustar y también es fácil cambiar los objetivos de control e imponer restricciones. Como contraparte, la principal desventaja es que requiere de un sistema de muestreo y control muy rápido para lograr resolver el problema de optimización en tiempo real.
- ItemDevelopment of a long-stroke MR damper for a building with tuned masses(2016) Zemp, René; Llera Martin, Juan Carlos de la; Saldías Molina, Hernaldo Enrique; Weber, Félix; Pontificia Universidad Católica de Chile. Escuela de Ingeniería; Pontificia Universidad Católica de Chile. National Research Center for Integrated Natural Disaster ManagementThis article deals with the development of a long-stroke MR-damper aimed to control, by reacting on a tuned mass (TM), the earthquake performance of an existing 21-story office building located in Santiago, Chile. The +/- 1 m stroke MR-damper was designed using the nominal response of the building equipped with two 160 ton pendular masses tuned to the fundamental lateral vibration mode of the structure. An extended physical on-off controller, a special current driver, a new real-time structural displacement sensor, and an MR-damper force sensor were all developed for this application. The physical damper and control were experimentally validated using a suite of cyclic and seismic signals. The real-time displacement sensor developed was validated by first using a scaled down building prototype subjected to shaking table tests, and then a real-scale free vibration test on the sensor installed horizontally at the foundation level of a building. It is concluded that the proposed TM and MR-damper solution is technically feasible, and for an equivalent key performance index also defined herein, more economical than a solution based on passive viscous dampers.