An approximate non-linear model for aeroengine control
An approximate non-linear model for aeroengine control
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DOI：
10.1177/0954410011400959
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发表时间：
2011-09
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影响因子：
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通讯作者：
Daren Yu;H. Zhao;Zhiqiang Xu;Y. Sui;Jinfu Liu
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文献类型：
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作者：
Daren Yu;H. Zhao;Zhiqiang Xu;Y. Sui;Jinfu Liu
面向控制的非线性建模是航空发动机可靠非线性控制的要求。必须简化复杂的发动机模型，以便可以应用先进的非线性控制技术。一些简化的发动机模型失去了物理可解释性，进而失去了对真实闭环系统稳定性和性能的分析能力，这最终阻碍了它们的工业应用。近年来，线性变参数模型在航空发动机控制中取得了一定的成功，但其潜在的缺陷也在理论研究中被提出。本文将从模型的角度来揭示这个问题。然后，介绍了一种航空发动机控制的近似非线性模型，并给出了一种更有效建模的辨识方法。仿真结果表明，该模型在捕捉涡扇发动机的非线性行为方面具有较好的精度。从理论上讲，用该模型设计的控制器可以保证实际对象的局部稳定性和性能。
Control-oriented non-linear modelling is the requirement of reliable non-linear control for aeroengines. The complex engine model must be simplified such that advanced non-linear control techniques can be applied. Some simplified engine models lose the physical interpretability, and further, the analysability of stability and performance of the real closed-loop system, which eventually hinders their industrial implementation. Linear parameter-varying model attains certain success in aeroengine control in recent years, but its potential drawback has also been proposed in theoretical research. This article proceeds to reveal this problem from a model perspective. Then, an approximate non-linear model for aeroengine control is introduced, followed by an identification procedure for more efficient modelling. Simulations show good precision of this model in capturing the non-linear behaviour of a turbofan engine. Theoretically, controllers designed with this model can guarantee local stability and performance for the real plant.