There are problems that are difficult to solve through mathematical programming or by classical methods. These problems are called hard problems due to their high complexity or high dimension. On the other hand, mataheuristics intends to seek a better solution to a problem. The Improvement Harmony Search algorithm is proposed under modification of the bandwidth parameter increasing the quality of the exploitation of the solutions. That is why within the state of the art, are mentioned several versions of harmonic search. The state of the art is supports the fact that the algorithm belongs to the category of those who make modifications to its parameters. This research demonstrates the ability of ImHS to solve a problem of high complexity focused on solving four-bar mechanism designs, whose solutions imply high dimension and which are also classified as hard problems. The two problems that are solved in this investigation, are problems very attacked within the state of the art by various metaheuristics. A comparison is then made against previous solutions with traditional metaheuristics and other versions of harmony search algorithm. Finally, the effectiveness of performance is demonstrated, where proposed algorithm it exceeded five metaheuristic algorithms and five harmony search versions. An optimum is provided in an easy and useful way, the parametric statistics are improved and the number of feasible solutions is exceeded in NPhard problems as in the case of problems with four-bar mechanisms.INDEX TERMS algorithms performance, four-bar mechanism, improved harmony search, optimization problems, mechatronic.
Resumen. En este trabajo se presenta una solución novedosa para el diseñoóptimo de un efector final tipo pinza, para la transmisión de fuerza constante en su espacio de trabajo o agarre. Para tal fin se propone un problema de optimización numérica con restricciones asociado al mecanismo, el cual se resuelve utilizando el algoritmo de evolución diferencial. La función objetivo propuesta es la transmisión de fuerza constante por parte del eslabón de agarre. Los resultados obtenidos muestran una transferencia de fuerza constante con diferentes configuraciones del efector final, comprobándose la naturaleza multimodal del problema.
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