Li Jitao, Fang Xu, Zhang Zhihao, Wang Yujia, Liu Xing, Zhang Mingjun
College of Mechanical and Electrical Engineering, Harbin Engineering University, 150001, PR China.
School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore.
ISA Trans. 2024 May 15. doi: 10.1016/j.isatra.2024.05.024.
This paper addresses robust fault detection observer design for a class of discrete-time Takagi-Sugeno nonlinear systems. A novel design method is presented based on finite-frequency H/H indices and peak-to-peak analysis. The finite-frequency H and H indices are utilized to characterize fault sensitivity and disturbance robustness, respectively. The peak-to-peak analysis is used to derive a dynamic threshold. An iterative algorithm is further developed to reduce conservatism. Theoretical proof shows that the performance of the proposed method is not worse than some existing works. Simulation results demonstrate the validity and viability of the proposed method.
本文研究了一类离散时间Takagi-Sugeno非线性系统的鲁棒故障检测观测器设计问题。提出了一种基于有限频率H/H指标和峰峰值分析的新颖设计方法。有限频率H指标和H指标分别用于表征故障灵敏度和干扰鲁棒性。通过峰峰值分析推导动态阈值。进一步开发了一种迭代算法以减少保守性。理论证明表明，所提方法的性能不劣于一些现有方法。仿真结果验证了所提方法的有效性和可行性。
