Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Parametric Sensitivity Optimization of a Load Cell with Strain
Submission Author:
Ígor Simon , RS , Brazil
Co-Authors:
Ígor Simon, Herbert Gomes
Presenter: Ígor Simon
doi://10.26678/ABCM.COBEM2019.COB2019-0294
Abstract
Load cells are devices capable of converting mechanical loads into proportional electric signal, capable of being read and interpreted by electronic equipment such as Wheatstone bridge and amplifier. Aiming at improving the sensitivity of the load cell to a given applied force, to ensure integrity to a given loading cycle, a parametric optimization of the load cell shape is performed by modifying specific dimensions and proportions. The Ansys software is used as the FEM analysis tool for both static loading and modal analysis, and a PSO metaheuristic algorithm is implemented in Python language, to perform the optimization. The multiobjective function includes mass minimization and maximization of load cell sensitivity and first natural frequency. Stress/strain iso-surfaces are presented of the optimized model and compared with the initial design using parameters nominal values. The obtained result has 38% of reduction on the objective function value, with gains on the mass and first natural frequency.
Keywords
Load cell, Optimization, metaheuristic, finite elements method
