Controller tuning by means of multi-objective optimization algorithms: a global tuning framework

© 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.A holistic multi-objective optimization design technique for controller tuning is presented. This approach gives control engineers greater flexibility to select a controller that matches their specifications. Furthermore, for a given controller it is simple to analyze the tradeoff achieved between conflicting objectives. By using the multi-objective design technique it is also possible to perform a global comparison between different control strategies in a simple and robust way. This approach thereby enables an analysis to be made of whether a preference for a certain control technique is justified. This proposal is evaluated and validated in a nonlinear multiple-input multiple-output system using two control strategies: a classical proportional- integral-derivative control scheme and a feedback state controller.This work was supported in part by the FPI-2010/19 Grant and the Project PAID-06-11 from the Universitat Politecnica de Valencia and in part by the Projects DPI2008-02133, TIN2011-28082, and ENE2011-25900 from the Spanish Ministry of Science and Innovation.Reynoso Meza, G.; García-Nieto Rodríguez, S.; Sanchís Saez, J.; Blasco, X. (2013). Controller tuning by means of multi-objective optimization algorithms: a global tuning framework. IEEE Transactions on Control Systems Technology. 21(2):445-458. https://doi.org/10.1109/TCST.2012.2185698S44545821

Meteorología Canaria: experiencia de SAERCO

Presentación realizada en 2ª Jornada técnica con usuarios aeronáuticos, celebrada el 23 de octubre de 2013 en los Servicios Centrales de AEMET en Madrid

Modelling, Simulation and Control of a Twin Rotor MIMO-System

The object of the project is to simulate and control the laboratory helicopter model called Twin-Rotor Multiple Input-Multiple Output System (TRMS 33-220), manufactured by Feedback Instruments Limited Company. So the first aim was to get familiar with the physical basics of the model what implicated an intensive literature research at the beginning of the work on this project. Having built up the basic mathematical model there was to deal with adjusting the particular parameters by engaging several experiment on the real model comparing the results of the simulation done in Matlab/Simulink. This was one of the most delicate tasks during the projects since there was to deal with constants that were not directly measurable and because particular parts of the model had been changed in the past so that the constant parameters given in the manual went out of date. The control design as well was done using Matlab/Simulink Having reached satisfactory results of the model further experiments were thenceforward on a simulator, firstly implemented in Labview, then embedded on a real-time platform called PXI-1002 manufactured by National Instruments to avoid physical damages of the real model by possible failures during the controller testing. The two control objects were first to keep the helicopter at a certain point and second to follow a given trajectory. So the first effort to create a control was to design two independent PID-Controllers, one for the vertical axis and one for the horizontal one, considering the cross-coupling forces as disturbance. This form of control worked out quite fine as long as only one input was changed. To compensate the disturbances correctly we had to deal with a different type, called state-space-control. The final task was to run the designed controller on the PXI-1002 controlling the physical system.Gabriel Christoph, BX.; García-Nieto Rodríguez, S. (2016). Modelling, Simulation and Control of a Twin Rotor MIMO-System. http://hdl.handle.net/10251/6634

Resultados del Concurso de Ingeniería de Control 2012 y Convocatoria 2013

Este trabajo ha sido realizado parcialmente gracias al apoyo del Ministerio de Ciencia e Innovacion (Gobierno de España) mediante la Acciones Complementarias DPI2010-12026-E y DPI2011-15857-E, y la Universitat Politecnica de València a ` traves de la beca UPV-FPI-2010/19.Blasco, X.; Reynoso Meza, G.; García Nieto, S. (2013). Resultados del Concurso de Ingeniería de Control 2012 y Convocatoria 2013. Revista Iberoamericana de Automática e Informática Industrial (RIAI). 10(2):240-244. https://doi.org/10.1016/j.riai.2013.03.015S240244102Blasco, X., García-Nieto, S., & Reynoso-Meza, G. (2012). Control autónomo del seguimiento de trayectorias de un vehículo cuatrirrotor. Simulación y evaluación de propuestas. Revista Iberoamericana de Automática e Informática Industrial RIAI, 9(2), 194-199. doi:10.1016/j.riai.2012.01.001García-Nieto, S., Blasco, X., Sanchiz, J., Herrero, J., Reynoso-Meza, G., Martínez, M., 2012. Trackdrone lite. Riunet: http://hdl.handle.net/10251/16427.Messac, A. (1996). Physical programming - Effective optimization for computational design. AIAA Journal, 34(1), 149-158. doi:10.2514/3.13035Sanchis, J., Martínez, M. A., Blasco, X., & Reynoso-Meza, G. (2010). Modelling preferences in multi-objective engineering design. Engineering Applications of Artificial Intelligence, 23(8), 1255-1264. doi:10.1016/j.engappai.2010.07.00

Optimization of sonic crystal attenuation properties by ev-MOGA multiobjective evolutionary algorithm

[EN] This paper shows a promising method for acoustic barrier design using a new acoustic material called Sonic Crystals (SCs). The configuration of these SCs is set as a multiobjective optimization problem which is very difficult to solve with conventional optimization techniques. The paper presents a new parallel implementation of a Multiobjective Evolutionary Algorithm called ev-MOGA (also known as (sic)-MOGA) and its application in a complex design problem. ev-MOGA algorithm has been designed to converge towards a reduced, but well distributed, representation of the Pareto Front (solution of the multiobjective optimization problem). The algorithm is presented in detail and its most important properties are discussed. To reduce the ev-MOGA computational cost when.Partially supported by MEC (Spanish Government) and FEDER funds: projects DPI2005-07835, MAT2006-03097 and Generalitat Valenciana (Spain) projects GV06/026, GV/2007/191Herrero Durá, JM.; Garcia-Nieto, S.; Blasco, X.; Romero García, V.; Sánchez Pérez, JV.; García-Raffi, LM. (2009). Optimization of sonic crystal attenuation properties by ev-MOGA multiobjective evolutionary algorithm. Structural and Multidisciplinary Optimization. 39(2):203-215. https://doi.org/10.1007/s00158-008-0323-7S203215392Alander J (2002) An indexed bibliography of genetic algorithms & pareto and constrainedoptimization. Tech Rep, Dpt of Information Technology, University of VaasaCantú-Paz E (1997) A survey of parallel genetic algorithms. Tech Rep 97003, Illimois Genetic Algorithms LaboratotyCervera F, Sanchis L, Sánchez-Pérez JV, Martínez-Sala R, Rubio C, Meseguer F, López C, Caballero D, Sánchez-Dehesa J (2002) Refractive acoustic devices for airborne sound. Phys Rev Lett 88:0239021–0239024Chen Y, Ye Z (2001) Theoretical analysis of stop bands in two-dimensional periodic scattering arrays. Phys Rev E 64:036616Coello C, Toscano G, Mezura E (2005) Information processing with evolutionary algorithms. In: Grana M, Duro R, d’Anjou A, Wang PP (eds) Information processing with evolutionary algorithms: from industrial applicationsto academic speculations. Springer, New York, pp 213–231Coello C, Veldhuizen D, Lamont G (2002) Evolutionary algorithms for solving multi-objective problems. Kluwer, DordrechtDeb K (2007) Current trends in evolutionary multi-objective optimization. Int J Simul Multidiscipl Des Optim 1:1–8Eshelman LJ (1991) The chc adaptive search algorithm: how to have safe search when engaging in nontraditional genetic recombination. In: Proceedings of the first workshop on foundations of genetic algorithms. Morgan Kaufmann, San Francisco, pp 265–283Fonseca C, (1995) Multiobjective genetic algorithms with application to control engineeringproblems. PhD thesis, Dpt of Automatic Control and Systems Engineering, University of SheffieldFuster E, Romero-García V, García-Raffi LM, Sánchez-Pérez EA, Sopena M, Sánchez-Pérez JV (2006) A phenomenological model for sonic crystals based on artificial neural networks. J Acoust Soc Am 120(2):1–6García-Pablos D, Sigalas M, de Espinosa FM, Torres M, Kafesaki M, García, N (2000) Theory and experiments on elastic band gaps. Phys Rev Lett 84:4349–4352Gazonas GA, Weile DS, Wildman R, Mohan A (2006) Genetic algorithm optimization of phononic bandgap structures. Int J Solids Struct 43:5851–5866Hakkansson A, Cervera F, Sánchez-Dehesa J (2005) Sound focusing by flat acoustic lenses without negative refraction. Appl Phys Lett 86:0541021–0541023Herrero J, Blasco X, Martínez M, Ramos C, Sanchis J (2007) Non-linear robust identification of a greenhouse model using multi-objective evolutionary algorithms. Biosyst Eng 98(3):335–346Herrero JM (2006) Non-linear robust identification using evolutionary algorithms. PhD thesis, Universidad Politécnica de Valencia, ValenciaHussein MI, Hamza K, Hulbert GM, Saitou K (2007) Optimal synthesis of 2d phononic crystals for broadband frequency isolation. Waves Random Complex Media 17(4):491–510Hussein MI, Hamza K, Hulbert GM, Scott RA, Saitou K (2006) Multiobjective evolutionary optimization of periodic layered materials for desired wave dispersion characteristics. Struct Multidisc Optim 31:60–75Kafesaki M, Economou E (1999) Multiple scattering theory for three-dimensional periodic acoustic composites. Phys Rev B 60:11993Kohn W, Rostoker N (1954) Solution of the schrodinger equation in periodic lattices with an aplication to metallic lithium. Phys Rev 94:1111Korringa J (1947) On th calculation of the energy of a bloch wave in a metal. Physica XIII:392Kushwaha M (1997) Stop-bands for periodic metallic rods: Sculptures that can filter the noise. Appl Phys Lett 70:3218–3220Laumanns M, Thiele L, Deb K, Zitzler E (2002) Combining convergence and diversity in evolutionary multi-objective optimization. Evol Comput 10(3):263–282Martínez-Sala R, Sancho J, Sánchez J, Gómez V, Llinares J, Meseguer F (1995) Sound attenuation by sculpture. Nature 378:241Miettinen KM (1998) Nonlinear multiobjective optimization. Kluwer, DordrechtMishra S, Deb K, Mohan M (2005) Evaluating the ε-domination based multi-objective evolutionary algorithm for a quick computation of pareto-optimal solutions. Evol Comput 13(4):501–526Romero-García V, Fuster E, García-Raffi LM, Sánchez-Pérez EA, Sopena M, Llinares J, Sánchez-Pérez JV (2006) Band gap creation using quasiordered structures based on sonic crystals. Appl Phys Lett 88:1741041–17410413Sánchez-Pérez JV, Caballero D, Martínez-Sala R, Rubio C, Sánchez-Dehesa J, Meseguer F, Llinares J, Gálvez F (1998) Sound attenuation by a two-dimensional array of rigid cylinders. Phys Rev Lett 80:5325–5328Sánchez-Pérez JV, Rubio C, Martínez-Sala R, Sánchez-Grandia R, Gómez V (2002) Acoustic barriers based on periodic arrays of scatterers. Appl Phys Lett 27:5240–5242Sanchis L, Hakkansson A, López-Zanón D, Bravo-Abad J, Sánchez-Dehesa J (2004) Integrated optical devices design by genetic algorithm. Appl Phys Lett 84:4460–4462Shen M, Cao W (2001) Acoustic band-gap engineering using finite-size layered structures of multiple periodicity. Appl Phys Lett 75:3713–3715Sigalas M, Economou E (1992) Elastic and acoustic wave band structure. J Sound Vib 158:377Zitzler E (1999) Evolutionary algorithms for multiobjective optimization: Methods and applications. Ph.D. thesis, Swiss Federal Institute of Technology Zuric

Applied Pareto multi-objective optimization by stochastic solvers

[EN] It is well known that many engineering design problems with different objectives, some of which can be opposed to one another, can be formulated as multi-objective functions and resolved with the construction of a Pareto front that helps to select the desired solution. Obtaining a correct Pareto front is not a trivial question, because it depends on the complexity of the objective functions to be optimized, the constraints to keep within and, in particular, the optimizer type selected to carry out the calculations. This paper presents new methods for Pareto front construction based on stochastic search algorithms (genetic algorithms, GAs and multi-objective genetic algorithms, MOGAs) that enable a very good determination of the Pareto front and fulfill some interesting specifications. The advantages of these applied methods will be proven by the optimization of well-known benchmarks for metallic supported I-beam and gearbox design. (C) 2008 Elsevier Ltd. All rights reserved.This research has been partially financed by GV06-026 Generalitat Valenciana and DPI2005-07835, MEC (Spain)-FEDER.Martínez Iranzo, MA.; Herrero Durá, JM.; Sanchís Saez, J.; Blasco, X.; García-Nieto, S. (2009). Applied Pareto multi-objective optimization by stochastic solvers. Engineering Applications of Artificial Intelligence. 22(3):455-465. https://doi.org/10.1016/j.engappai.2008.10.018S45546522

Multi-Objective Optimization for Wind Estimation and Aircraft Model Identification

In this paper, a novel method for aerodynamic model identification of a micro-air vehicle is proposed. The principal contribution is a technique of wind estimation that provides information about the existing wind during flight when no air-data sensors are available. The estimation technique employs multi-objective optimization algorithms that utilize identification errors to propose the wind-speed components that best fit the dynamic behavior observed. Once the wind speed is estimated, the flight experimentation data are corrected and utilized to perform an identification of the aircraft model parameters. A multi-objective optimization algorithm is also used, but with the objective of estimating the aerodynamic stability and control derivatives. Employing data from different flights offers the possibility of obtaining sets of models that form the Pareto fronts. Deciding which model best adjusts to the experiments performed (compromise model) will be the ultimate task of the control engineer.The authors would like to thank the Spanish Ministry of Innovation and Science for providing funding through grant BES-2012-056210 and projects TIN-2011-28082 and ENE-25900. We also want to acknowledge the Generalitat Valenciana for financing this work through project PROMETEO/2012/028.Velasco Carrau, J.; García-Nieto Rodríguez, S.; Salcedo Romero De Ávila, JV.; Bishop, RH. (2015). Multi-Objective Optimization for Wind Estimation and Aircraft Model Identification. Journal of Guidance, Control, and Dynamics. 39(2):372-389. https://doi.org/10.2514/1.G001294S37238939

Analysis of the sexist representation of the figure of women: case study of the most viewed video clips on YouTube Spain in 2020

[ES] La figura de la mujer en los medios audiovisuales ha estado tradicionalmente asociada a una sobrexposición de sus atributos sexuales como objeto de deseo y no como sujeto deseante. Con el objetivo de analizar si esta tendencia sigue presente en los hábitos de consumo actuales, en este trabajo se presenta un estudio de casos para analizar los 10 videoclips más vistos en 2020 en YouTube España. Los resultados del análisis de los videoclips revelan que el uso de referentes sexuales y la representación del cuerpo de la mujer se alejan de la neutralidad. Además, la aparición de mujeres latinas y caucásicas de complexión ectomorfa se asoció con un mayor grado de sexismo. Esto revela que la tendencia sexista se mantiene en las preferencias de consumo de la sociedad española en cuanto a videoclip y letras de las canciones.[EN] The figure of women in the audiovisual media has traditionally been associated with an overexposure of their sexual attributes as an object of desire and not as a desiring subject. In order to analyze whether this trend is still present in current consumer habits, this work presents a case study to analyze the 10 most viewed video clips in 2020 on YouTube Spain. The results of the content analysis reveal that the use of sexual references and the representation of the woman's body are far from neutrality. In addition, the appearance of Latina and Caucasian women with an ectomorphic complexion was associated with a higher degree of sexism. This reveals that the sexist trend is maintained in the consumer preferences of Spanish society in terms of video clips and song lyrics

Diseño Conceptual Proyecto H200

El documento muestra el diseño conceptual previo para el desarrollo de la aeronave no tripulada denominada H200, cuyo principal objetivo es poder embarcar una pila de hidrógeno tipo PEM para extender la autonomía de vuelo.Costea Andronache, SA.; Cerdán Torres, JD.; Such García, JA.; García-Cuevas González, LM.; García-Nieto Rodríguez, S. (2023). Diseño Conceptual Proyecto H200. Universitat Politècnica de València. http://hdl.handle.net/10251/19444

A new genus and species of asteraceae-inhabiting aphid (hemiptera: aphididae) from Costa Rica and Mexico

P. 323-331Ucrimyzus villalobosi Mier Durante & Pérez Hidalgo gen. n., sp. n. (Hemiptera: Aphididae: Macrosiphini) are described from apterous and alate viviparous females collected on species of genera Bidens, Schkuhria, Senecio and Stevia (Asteraceae: Asteroideae) in Costa Rica and Mexico. Principal components analysis (PCA) was done to verify that the studied aphids belong to a single species regardless of their geographical origin or host plant. Molecular analyses were carried out on the sequences of a fragment of the mitochondrial gene encoding for cytochrome c oxidase subunit 1 (COI) and of a fragment of the nuclear gene encoding elongation factor 1α (EF1α). The taxonomic discussion takes into account the conclusions of the molecular analyses and the morphologic study compared with other genera of Macrosiphini. The identification keys by Blackman & Eastop (2006) to aphids living on each mentioned plant genus are modified to include the new speciesS