Research of Frequency Characteristics of Dynamic Systems

An analysis of how a dynamic system’s frequency responds when subjected to harmonic excitation at various input frequencies is the primary goal of this study. The study was carried out using MATLAB/Simulink as the simulation-based medium. A Simulink model (simulation) of the dynamic system (first-order) was completed using baseline functional blocks (sine wave generator, output signal display block, and transfer function block). The output signal of this dynamic system (first-order) was analysed with sinusoidal signals at varying frequencies. The results indicated that the output signal accurately followed the input signal for low input frequencies; however, at higher input frequencies, both the output signal number of amplitudes and resultant phase lag increased significantly as compared to those associated with lower frequency input signals. These results provided an indication of the system’s filtering characteristics. Consequently, the effectiveness of MATLAB/Simulink for modelling, visualizing, and analysing the frequency response of dynamic systems has been documented by this study; thereby benefiting future engineering, control, and modelling system design and analysis.

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