Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Robust Degree of Stability and Adjustment of Regulators for Technological Objects With a Delay A.M. TSIRLIN, G.B. BORISOV The problem of robust stability and self-tuning of single-loop linear systems with feedback is considered, in which the modulus of the amplitude-phase characteristic (AFC) of the open-loop system decreases monotonically with frequency (monotonicity condition). The concept of a critical combination of object parameters is introduced. An analytical solution is obtained for the problem of robust controller tuning for typical control laws and an aperiodic industrial facility with a delay. It is shown that for such systems the monotonicity condition is satisfi ed. Calculation formulas are derived for automatic tuning of regulators in such systems. Keywords: robust stability, systems with delay, monotonicity conditions, settings of typical regulators, self-tuning system. DOI: 10.25791/pribor.10.2021.1299 Pp. 39-45.