Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Dynamics analysis of the robust automation system of sheet glass production V.G. RUBANOV O.V. LUTSENKO The article focuses on the technological process automation of sheet glass production using vertical drawing glass machines. An essential control object feature is the interval parameters influencing the system dynamic characteristics. It dictates the use of complex control systems that have adaptive properties allowing to adapt to parameters changes, or the use of an approach to a «rough» systems class solution. It is shown that the application of evaluating filters requiring mandatory introduction statistical information processing subsystems unnecessarily complicates the system structure. Whereas the robust control is more rational. Interval parameters are identified and their physical origin is illustrated on base of the drawing glass modes analysis. Their implementation, for example by varying the glass ribbon thickness, significantly changes drawing speed and hence the delay time and the inertia moment depended on the mass. Article also describes research methods of the interval parameters influence on control object robust stability using classical PID control law. Locuses of the robust system frequency characteristics are given and their mutual arrangement with the circle that characterizes parameter perturbation scale is shown. It allows make conclusion about the system robust stability nature. Key words: technological process, sheet glass, vertical drawing, system, functional diagram, block diagram, transfer function, parameter, interval, robustness, stability, control law. Contacts: Email: rubanov@intbel.ru Pp. 37-44.