Modeling and Simulation of Electrical Circuits

Study Case Modeling and Simulation of Electrical Circuits for Basic Physics and Electronics with MATLAB Simulink Michael Kurniawan (2018123456) University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH 45221, United States kurniaml@mail.uc.edu Abstract Basic physics and electronics can be taught using MATLAB with the Simulink method, through the simulation of basic physics and electronics formulas visualized in the form of graphs and simulation displays. The material focused on includes understanding electricity, including current, voltage, and electrical power. The use of the Simulink method helps students understand these concepts more interactively through realistic simulations. Keywords: basic physics learning, MATLAB, Simulink method INTRODUCTION Until now, basic physics and electronics learning has generally only emphasized theory without guidance in the form of models or simulations, making it difficult for students to understand electrical concepts such as current, voltage, and power. Models and simulations are designed to provide a more concrete understanding of these materials. The use of MATLAB with the Simulink method allows the creation of electrical circuit models so that students can visualize the relationship between current, voltage, and electrical power. MATLAB uses arrays/matrices as standard variables, without requiring declarations as in other programming languages. MATLAB can also be integrated with external languages such as C, Java, .NET, and Microsoft Excel. This software has various applications, especially for mathematical calculations performed entirely in matrix form. All mathematical operations in MATLAB are matrix-based, and the calculation results MICHAEL KURNIAWAN 1 Study Case can be visualized in the form of graphs that can be customized using a user-created GUI. Main Parts of MATLAB: 1. Development Environment: Facilities for utilizing MATLAB functions and files, including GUI, MATLAB Desktop, Command Window, command history, editor/debugger, and browsers for help, workspace, and files. 2. Mathematical Function Library: A collection of computational algorithms, ranging from basic functions such as sum, sin, cos, to complex functions such as matrix inverses, eigenvalues, Bessel functions, and Fast Fourier Transform (FFT). 3. MATLAB Language: A high-level matrix/array-based language with control flow, functions, data structures, I/O, and object-oriented programming features, supporting simple to complex programming, as well as reading and writing MAT-files. Simulink itself has many uses, such as electronic circuit simulation, signal processing, differential equation modeling, and others. Simulink allows simple function plotting and storage of simulation results. Figure 1. Simulink Block Diagram Simulink is a MATLAB feature used to simulate dynamic or embedded designs or models, aiming to assess the performance of a system according to the expected design. Basic electronics is a standard competency that aims to provide students with knowledge and skills related to basic electronics concepts. The research question is how the application of physics and basic electronics learning simulation models with MATLAB Simulink can be implemented in universities and private colleges in the United States. The scope of the research includes the design and application of electrical simulation models using the MATLAB Simulink method. The purpose of this research is to provide students with an understanding of physics and basic electronics learning through simulation using MATLAB Simulink. The results of this study are expected to help students understand the material in a more interactive and practical way. MICHAEL KURNIAWAN 2 Study Case METHOD Physics and basic electronics learning in this study was carried out by simulating electrical formulas related to current, voltage, and electrical power using MATLAB Simulink, through the following stages: Figure 2. Research Framework This study used the model and simulation method, which is an approach that reveals the relationship between variables and evaluates the effect of one variable on another. The aim was to assess the effectiveness of using Simulink in teaching basic physics and electronics. The development of the teaching system includes the theory of current, voltage, and electrical power, as well as the design of models and simulations with Simulink. The output of the simulation is a block diagram of learning media that reflects the calculation of current, voltage, and electrical power. Simulink is a MATLAB platform for simulating dynamic systems in real time, with various toolboxes for assembling dynamic systems. Figure 3. Output from the Simulink Method MICHAEL KURNIAWAN 3 Study Case Figure 4. Electrical Sources - DC Voltage Source Component Figure 5. Electrical Sources - DC Voltage Source Component Figure 6. Measurement - Voltage Measurement Component MICHAEL KURNIAWAN 4 Study Case Figure 7. Output of Electrical Circuit with Simulink Method Simulink is a graphical extension of MATLAB that models and simulates systems as block diagrams, including transfer functions, summing junctions, and virtual input/output devices such as function generators and oscilloscopes. Data from each block is connected via lines for signal flow simulation. RESULTS AND DISCUSSION The application of electrical circuit simulation models using MATLAB with the Simulink method can be applied to basic physics and basic electronics lecture materials. With the MATLAB Simulink program, basic electrical theory can be visualized in an interactive display that makes it easier for students to understand electrical circuit concepts. Input components can be determined through the Simulink Library Browser, which consists of: 1. Electrical Sources: DC Voltage Source components 2. Elements: Series Voltage Branch components 3. Measurement: Voltage Measurement components 4. Simulation results displaying current, voltage, and resistance in Simulink This simulation allows students to see the direct relationship between theory and practical application in electrical circuits. MICHAEL KURNIAWAN 5 Study Case CONCLUSION Based on the results of testing the application, several conclusions can be drawn: 1. The MATLAB Simulink application helps in creating models and simulations of electrical circuits, including voltage, current, and resistance, for learning basic physics and electronics. 2. The visual display of MATLAB Simulink facilitates the connection between the theory taught and the simulation model, allowing students to understand electrical concepts more intuitively and interactively. REFERENCE MICHAEL KURNIAWAN 6