N.I. Zhezhera
THE PRESSURE OF WORKING LIQUID IN THE SPLITS WITH THE CURVED WALLS OF THE REQULATING VALVES OF AUTOMATIC AND CONTROL SYSTEMS ^{[№ 1 ' 2001]}
The result of equations are given for measuring the pressure in the splits with a moving reciprocating wall of the regulating valves of automatic and control systems. The author gives the analysis about influence of concave and convexity of walls the distribution of pressure both from the wall and pressureils modification.

N.I.Zhezhera
SIGNAL INPUT BY THE DERIVATIVE FROM INLET PRESSURE IN SAFETY VALVE WITH SERVOOPERATION. ^{[№ 3 ' 2000]}
The article describes the theoretical analysis and experimental test results of the signal input by the derivative from inlet pressure in safety valve with servooperation by means of resilient capacity connection into space between the basic and pilot valves.

N.I.Zhezhera, V.V. Kravchenko
MATHEMATICAL DESCRIPTION OF STEAM ELECTRIC STATIONS AND BOILER ROOM UNITS REDUCING INSTALLATIONS AT SUBCRITICAL ATMOSPHERIC STEAM ^{[№ 2 ' 2000]}
This article represents differential equation of atmospheric steam reducing installations of steam electric stations and boil room units where steam speeds through adjusting valves are subcritical. The reducing installations are considered as automation objects of numeral control systems synthesis. The differential equation transformation into operative and dimensionless form and its linearization are made. Using typical dynamic units of automatic control theory, the reducing installations structural scheme is done.