Control Programs of the Aviation Gas Turbine Engine in the Modes of Acceleration, Gas Reset, Start-up. Optimization and Estimation of the Quality of Control Programs

Abstract

The article is devoted to the formation of requirements for the accuracy of regulation of an aviation gas turbine engine, one of which is the maintenance of engine thrust at a given operating mode, regardless of the engine condition, within the gas temperature margin. Its value should not be significantly affected by turning on or off additional power and air consumers, as well as various regulatory influences on the part of the automatic control system (turning on or turning off the bypass in the compressor and blowing the housings, partial restriction of the supply of cooled air, changing the position of the guiding devices). Fulfilling the requirements for the accuracy of regulation is important for ensuring the reliability and safety of the operation of the power plant and the convenience of controlling the aircraft. In order to reduce operating costs, it is necessary that during operation, a minimum number of additional settings of the ACS in the acceleration mode, gas reset and start-up mode are required. The control program is implemented in the form of a automatic control system (ACS), which is a closed circuit of the main feedback. There is also a flexible local feedback loop in the circuit, which is designed to stabilize the ACS, which contributes to the fact that the ACS is quite stable. The presence of feedback in the ACS indicates that the system may be unstable, so the analysis of the ACS should include an assessment of its stability and, if necessary, the selection of measures and means for its stabilization. Changing the input signal at the first moment of time leads to a corresponding increase in deviation, since the links in front of the object and the object itself have inertia and therefore the rotation frequency cannot change instantly. The change in deviation, being an amplified amplifier, thyristor converter and generator, taking into account their inertia, leads to a gradual change in the control value, the voltage on the anchor, which smoothly changes the frequency of rotation of the shaft so that the tracking error, that is, the deviation, is directed to zero. Voltage feedback stabilizes the ACS and increases its speed. This is how tracking is done. The implementation of wireless technologies in the ACS of the gas station has been studied, which will allow to reduce the mass and dimensions of the nodes due to the reduction of the number of connectors and cables, increase the reliability and accuracy of the adjustment of the ACS, reduce maintenance costs and increase fire safety.