Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back On the Question of the Formation of Phase Portraits of Linear Systems of the Second Order in Dynamic Simulation Environment I.V. KOVALEV, V.V. LOSEV, M.V. SARAMUD, A.O. KALININ The issue of stage-by-stage synthesis of a second-order linear system with a model implementation based on an analog device with subsequent vectorization of the structural model in a dynamic simulation environment is considered. The gains of functional elements are empirically determined as numerical values of the simulated system, providing a visual similarity of the obtained output curves with typical phase portraits. A graphical representation of the characteristics of the system by the phase space method is obtained for various initial conditions. Keywords: Linear system, modeling, phase portraits. DOI: 10.25791/pribor.8.2023.1434 Pp. 44-50.