TY JOUR TI RESEARCH AND CONSTRUCTION OF FREQUENCY CHARACTERISTICS AT THE STAND "FUNDAMENTALS OF THE THEORY OF AUTOMATIC CONTROL" KW frequency characteristics KW phase KW amplitude KW dynamic system KW harmonic oscillations KW signal JO Modern Technologies and Scientific and Technological Progress AU Patrushev, K.Y. AU Uvarov, A.A. PY 2022 IS 2022 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»