Analytical redundancy of variable cycle engine based on variable-weights neural network

• Published in: Chinese journal of aeronautics Vol. 35; no. 10; pp. 84 - 94
• Main Authors: ZHANG, Zihao, HUANG, Xianghua, ZHANG, Tianhong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2022; Jiangsu Province Key Laboratory of Aerospace Power System,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
• Subjects: Analytical redundancy; Degradation; Multiple variables; Neural networks; Variable cycle engine; Analytical redundancy; Degradation; Multiple variables; Neural networks; Variable cycle engine
• ISSN: 1000-9361
• DOI: 10.1016/j.cja.2022.01.028

In this paper, variable-weights neural network is proposed to construct variable cycle engine’s analytical redundancy, when all control variables and environmental variables are changing simultaneously, also accompanied with the whole engine’s degradation. In another word, variable-weights neural network is proposed to solve a multi-variable, strongly nonlinear, dynamic and time-varying problem. By making weights a function of input, variable-weights neural network’s nonlinear expressive capability is increased dramatically at the same time of decreasing the number of parameters. Results demonstrate that although variable-weights neural network and other algorithms excel in different analytical redundancy tasks, due to the fact that variable-weights neural network’s calculation time is less than one fifth of other algorithms, the calculation efficiency of variable-weights neural network is five times more than other algorithms. Variable-weights neural network not only provides critical variable-weights thought that could be applied in almost all machine learning methods, but also blazes a new way to apply deep learning methods to aeroengines.