Modern systems of control of complex dynamic technological processes (by the example of nitric acid production)

Geoecological monitoring of the “Mustaqillikning 25 уilligi” gas field

“…; In general, the above values of carbon monoxide, sulfur dioxide, nitrogen dioxide are lower than the established normative values and these data correspond to the values recorded in the given territory during the environmental audit of 2017 and the values of environmental monitoring of previous years. The content of inorganic dust ranged from 0.05 to 0.9 MPC m.r., its concentration increased depending on the strengthening of wind gusts in the territory at the time of research [12][13][14][15] (Figure 2). An increased content of hydrogen sulfide in atmosphere of the surveyed area was recorded only at two local observation points and one EOPN, on the territory of well pads, an increased content of hydrogen sulfide was recorded only on the territory of K-10 and K-9, in the rest of the surveyed territory its concentrations were decreased comparing to the first stage observations and were fixed lower than the established normative value.…”

Filtering errors in primary sensor signals

“…In various papers, there is a practice of ignoring the spectrum superposition error or creating conditions where its influence could be neglected. It is known that all real signals have infinite spectra, which always determines the presence of spectrum superposition error [6]. Sometimes this error is really negligible, but more often its influence is significant When approximating the spectral response of a signal with a Butterworth filter function, it is necessary to ensure the coverage of the approximated function (Figure 4).…”

Construction of continuous and discrete non-linear prognostic models of the control system for the process of grinding ore materials

“…, 𝜆𝜆 � �. This, the system of arbitrary equations can be reduced to the canonical form [9][10][11][12][13][14].…”