非线性时延系统的非平衡线性化控制及其在涡扇发动机中的应用

Wenchong Yang, Yifeng Tang, Wenxiang Zhou, Gang Yang, Jinquan Huang, Tao Cui
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引用次数: 0

摘要

涡扇发动机具有明显的非线性特性,因此线性化已成为涡扇发动机控制与线性控制理论之间的重要环节。在线性化方法中,非平衡线性化与在平衡点附近运行的方法相比,具有更高的瞬态跟踪精度和更优越的控制器性能,因此更适合涡扇发动机等具有快速加减速特性的系统。硬件在环(HIL)实验对于验证涡扇发动机控制器的性能至关重要。然而,HIL 平台中的时间延迟会导致使用这种线性化方法设计的控制器出现状态变量振荡。为解决这一问题,本文介绍了一种基于非平衡线性化的控制策略。该策略采用非平衡线性化线性模型来近似非线性时延系统,然后为线性时延系统设计 H∞ 控制器。通过模拟、HIL 实验和半物理实验,验证了这种方法应用于涡扇发动机的有效性,包括其抗延迟和鲁棒跟踪能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Off-Equilibrium Linearization-Based Control of Nonlinear Time-Delay System and Application to a Turbofan Engine
Turbofan engines exhibit pronounced nonlinearity, so linearization has become a crucial link between turbofan engine control and linear control theory. Among linearization method, non-equilibrium linearization offers enhanced transient tracking accuracy and superior controller performance compared to methods operating near equilibrium points, making it more suitable for systems with rapid acceleration and deceleration, such as turbofan engines. Hardware-in-Loop (HIL) experiments are essential for verifying turbofan engine controller performance. However, time delay in the HIL platform can induce oscillations of state variables with controllers designed using this linearization method. To address this issue, this paper introduces an off-equilibrium linearization-based control strategy. This strategy employs a non-equilibrium linearized linear model to approximate the nonlinear time-delay system, followed by designing an H∞ controller for the linear time-delay system. The effectiveness of this approach applied to turbofan engines, including its anti-delay and robust tracking capabilities, is validated through simulations, HIL experiments, and semi-physical experiments.
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