TY JOUR TI POSSIBILITIES OF CYBER-PHYSICAL APPROACH TO STUDYING FREQUENCY PROPERTIES OF CLOSED SYSTEM WITH INCOMPLETE INFORMATION ABOUT CONTROL OBJECT MODEL KW control object KW amplitude-phase characteristic KW nonparametric estimates KW frequency characteristics of the object KW input and output signals KW closed system stability KW Scilab JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Krushel, E.. AU Potafeeva, E.. AU Ogar, T.. AU Stepanchenko, I.. AU Kharitonov, I.. PY 2021 IS 2021 PB Astrakhan State Technical University