20.500.12556/DKUM-88751 Design and optimization of a spherical magnetorheological actuator Recently, an increasing number of electromagnetic devices have been using smart fluids. These include ferrofluids, electrorheological fluids, and magnetorheological (MR) fluids. In the paper, magnetorheological fluids are considered for use in a spherical actuator for haptic applications. An approach is presented to the design and optimization of such a device, using finite element method modelling linked with differential evolution (DE). Much consideration was given to the construction of the objective function to be minimized. A novel approach to objective function assembly was used, using reference values based on the model design and created with parameters set to the midpoint values of the selected range. It was found to be a useful strategy when the reference values are unknown. There were four parameters to be optimized. Three of them gravitated towards the boundary value, and the fourth (actuator radius) was somewhere in between. The value of the objective function reached a minimum in the range of actuator radius between 42.9880 mm and 45.0831 mm, which is about a 5% difference in regard to the actuator radius. Three passes of optimization were performed with similar results, proving the robustness of the algorithm. magnetorheological fluid finite element method FEM optimization differntial evolution DE actuator magnetne tekočine metoda končnih elemetov diferencialna evolucija true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/journal/mathematics Članek v reviji 2024-05-22 14:50:09 2024-05-22 14:50:10 2024-05-23 03:42:41 0000-00-00 00:00:00 2023 0 0 23 str. no. 19, [article no.] 4098 Vol. 11 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-08-18 2023-09-26 2023-09-27 621.3 166722819 10.3390/math11194098 2227-7390 mathematics-11-04098.pdf mathematics-11-04098.pdf 1 591D4BFEC6B3F496B46CA89B462A38B7 5629e743fb50fd64eac6115e88dce2a8a13f84af29ee57f49bdf2020f8d1e0ae 226117d6-183a-11ef-8ccf-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=179624 https://www.mdpi.com/2227-7390/11/19/4098 0 2ef4256d-183a-11ef-8ccf-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=179625 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0