we introduce a new framework for running the finite element (FE) packages inside an online Loop together with MATLAB. Contrary to the Hardware-in-the-Loop techniques (HiL), in the proposed Software-in-the-Loop framework (SiL), the FE package represents a simulation platform replicating the real system which can be out of access due to several strategic reasons, e.g., costs and accessibility. Practically, SiL for sophisticated structural design and multi-physical simulations provides a platform for preliminary tests before prototyping and mass production. This feature may reduce the new product’s costs significantly and may add several flexibilities in implementing different instruments with the goal of shortlisting the most cost-effective ones before moving to real-time experiments for the civil and mechanical systems. The proposed SiL interconnection is not limited to ABAQUS as long as the host FE package is capable of executing user-defined commands in FORTRAN language. The focal point of this research is on using the compiled FORTRAN subroutine as a messenger between ABAQUS/CAE kernel and MATLAB Engine. In order to show the generality of the proposed scheme, the limitations of the available SiL schemes in the literature are addressed in this paper. Additionally, all technical details for establishing the connection between FEM and MATLAB are provided for the interested reader. Finally, two numerical sub-problems are defined for offline and online post-processing, i.e., offline optimization and closed-loop system performance analysis in control theory. Keywords: software-in-the-loop; finite element; optimal placement; structural optimization; vibration control.

Vibration Testing code affiliated with the in-progress manuscript Vibration Testing with Modal Analysis and Health Monitoring- Matlab version

MATLAB script for vibration test analysis of mechanical specimens

Analyzed EMG signals pre- and post-vibration therapy to study muscle fatigue. Calculated RMS values, performed paired t-tests (p=0.4127) in MATLAB, and visualized results. Findings showed no significant change, but highlighted trends in muscle activity through EMG signal processing.

This project was done by mechanical engineering students of IIT Roorkee in their BTech project. The matlab code here is written for formatting data into different format, extracting features and finally training and testing using Support Vector Machine(SVM) on vibration data. Data is taken from Case Western Reserve University.

Raw data (for now) of gyroid vibration tests as part of my master thesis at KTH. Files are MATLAB structures. I will be uploading small programs to format the data and analyse it in due time. Any comments/questions, mail me at matijam@kth.se

Matlab Test for Vibration Testing

Designed and built a spring-mass vibration isolation device to minimize transmissibility. Used MATLAB to calculate equilibrium height, natural frequency (~2.1 Hz), and transmissibility, then validated predictions through accelerometer testing.