Method of modeling the influence of manufacturing errors on characteristics of strain gauge force sensors

Abstract

This paper proposes a method for modeling the influence of manufacturing errors on the sensitivity of the strain gauge force sensors to side loads, bending, and torsional moments. The method works by defining various types of manufacturing errors (eccentricity, non-perpendicularity, non-straightness, etc.), that violate the structural symmetry of the sensor causing it to be sensitive to side loads and bending moments, and including these errors in a finite-element model of the sensor elastic element. The model undergoes stress analysis, and the stress-strain data is used to calculate the sensor sensitivity to side loads and bending moment. The method presented is implemented in a software module written in Python. The module employs the capabilities of the open-source software packages Salome-Meca and Code_Aster. In solving the task of designing strain gauge force sensors, this module can be used for assessing the manufacturability of sensor elastic elements. Besides, the method can be used as an educational tool for students to learn the influence of manufacturing errors on the performance of machined products.This paper proposes a method for modeling the influence of manufacturing errors on the sensitivity of the strain gauge force sensors to side loads, bending, and torsional moments. The method works by defining various types of manufacturing errors (eccentricity, non-perpendicularity, non-straightness, etc.), that violate the structural symmetry of the sensor causing it to be sensitive to side loads and bending moments, and including these errors in a finite-element model of the sensor elastic element. The model undergoes stress analysis, and the stress-strain data is used to calculate the sensor sensitivity to side loads and bending moment. The method presented is implemented in a software module written in Python. The module employs the capabilities of the open-source software packages Salome-Meca and Code_Aster. In solving the task of designing strain gauge force sensors, this module can be used for assessing the manufacturability of sensor elastic elements. Besides, the method can be used as an educatio...