CONTROL METHOD OF GAS TURBINE ENGINE Russian patent published in 2020 - IPC F02C9/00 

FIELD: engine building.

SUBSTANCE: invention relates to aircraft engine building and can be used in electrohydromechanical systems for automatic control of gas turbine engines. Disclosed is a device for implementing a method of controlling position of guiding devices of a gas turbine engine compressor, including parametric identification of non-linearity of electrohydromechanical drive of "insensitivity" type in real time and compensation of nonlinearity, providing asymptotic stability of control and astatic accuracy of positioning of guide vanes of compressor with allowance for found nonlinearity parameters, comprising an electrohydromechanical drive and an automatic control and monitoring unit, comprising an electrohydromechanical drive control device and a nonlinearity compensator which performs conversion of the control device output signal by formula

where I_p is a control signal from the control device output; I_u is the control current supplied to the input of the electrohydromechanical drive signal converter; N is maximum value of control current variation range; ΔZ=z_R-z_L is width of dead zone (specified in electro-hydromechanical drive certificate); d=(z_R+z_L)/2 is the dead zone center of hydromechanical system of electrohydromechanical drive, which is identified in real time by formula

where Y₀(t) is a task by the position of the compressor guide apparatus; Y(t) is the actual position of the compressor guide vanes; d_t1 – current value d at time t1; e(t) is current error by the position of the compressor guiding device; k, g are tuning parameters depending on gas turbine engine operation mode.

EFFECT: design of a method for controlling the position of guide vanes of a gas turbine engine compressor, providing asymptotic stability and astatic accuracy of positioning of guide vanes of a compressor taking into account non-linear characteristics of electrohydromechanical units.

2 cl, 2 dwg