MANAGEMENT OF COMPLEX TECHNOLOGICAL SYSTEMS UNDER CONDITIONS OF UNCERTAINTY OF INITIAL INFORMATION

Abstract

One of the promising and effective approaches of the modern control theory of complex technological systems in the conditions of uncertainty caused by the fuzziness of the initial information is an approach based on the use of expert evaluation methods and the theory of fuzzy sets. This article presents a study of the properties of an automatic control system with the use of a pseudo-linear fuzzy PID controller built on the basis of a correction device with phase advance.  One of the alternative methods of constructing control and regulation systems for objects that are indistinctly defined from the point of view of classical theory is the use of so-called fuzzy logic controllers. Therefore, the development of fuzzy control controllers based on existing microcontrollers is a very urgent task, since a pseudo-linear fuzzy controller built on the basis of fuzzy sets and fuzzy logical I/O, under the condition of uncertainty of the disturbing effect, is able to provide higher quality indicators of the transient process than a traditional PID controller. As pseudo-linear correction devices (PKU) we use: CU with amplitude suppression, with phase advance and with separate channels for amplitude and phase, since one of the main disadvantages of the PID controller is the presence of phase lag and high sensitivity to interference in the measuring channel.