Comparison of methods for constructing logarifmic frequency characteristics (LFC) of an open-loop automatic control system (ACS) using Mathcad 14, Matlab R2020b and manual method
As a research task, the authors determined an attempt to evaluate three methods for constructing LFC of an open ACS using Mathcad, Matlab and manually. According to the differential equations of the original ACS of the speed of rotation of the electric motor, functional and structural diagrams were developed. In the manual method, the characteristic was built on the basis of the elementary factors of the frequency function, and in the other two - programmatically using the code. Based on their comparison by absolute and relative measurement errors, it was revealed which of the listed methods is the most accurate and high-quality.