In this paper, a new distributed fault estimation observer with adjustable parameters is designed for a class of nonlinear interconnected systems. The presented fault estimator consists of proportional and integral terms to improve the accuracy of fault estimation. The observer gain matrices of the proposed fault estimation scheme for the underlying systems are calculated based on robust ${\mathcal {L}_{2}-\mathcal {L}_{2}}$ and ${\mathcal {L}_{2}-\mathcal {L}_\infty }$ performance. The proposed method achieves a lower performance level in the aspect of quantitative analysis compared with existing fault estimation approaches. A simulation example is provided to demonstrate the effectiveness of the new design method.

中文翻译：

---

一类非线性互联系统参数可调的分布式故障估计观测器设计

本文针对一类非线性互联系统，设计了一种参数可调的新型分布式故障估计观测器。提出的故障估计器包括比例项和积分项，以提高故障估计的准确性。基于鲁棒性，为基础系统提出了故障估计方案的观测器增益矩阵 $ {\ mathcal {L} _ {2}-\ mathcal {L} _ {2}} $ 和 $ {\ mathcal {L} _ {2}-\ mathcal {L} _ \ infty} $ 表现。与现有的故障估计方法相比，该方法在定量分析方面实现了较低的性能水平。提供了一个仿真示例，以演示新设计方法的有效性。