Abstract
The form and identification method of nonlinear dynamic gas turbine models on acceleration mode on the base of experimental transition processes is proposed. The nonlinear dynamic model of a gas turbine engine is represented as a system of nonlinear differential equations as in the normal form of Cauchy. The parameters of the system of differential equations are presented as a function of the acceleration parameter α, and the identification method is based on the determination of parameter α using numerical optimization method, allowing to simulate an acceleration mode with high accuracy. The experimental data are approximated by cubic splines for reduction of identification errors. The developed fast-calculating real-time nonlinear dynamic model is approved to implement in the software for hardware-in-the-loop test-beds and in the on-board software for automatic control systems of gas turbines.
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