Nonlinear System identification of Air turbine rocket engine based on Polynomial nonlinear state space model
Jiayu Liang,
Qingjun Zhao,
Wei Zhao
et al.
Abstract:The Air Turbine Rocket (ATR) engine is a promising combined cycle propulsion engine. This paper uses the polynomial nonlinear state-space (PNLSS) model to model and identify the nonlinear system of the ATR engine. A method of multiple uncorrelated step signals is proposed as the excitation signals for the nonlinear system. The adaptive Nelder-Mead simplex (ANMS) algorithm is used as the nonlinear least squares optimization algorithm to solve the PNLSS model parameters. The identification results show that the … Show more
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