摘要
提出一种多时滞不确定非线性系统的执行器故障鲁棒诊断方案。非线性只与系统输入和输出有关,不确定性包括系统输入和状态等环节。通过构造观测器对系统状态和输出进行估计,得到具有鲁棒性的阈值;若系统的实际输出与估计输出之差超出了阈值,则有故障发生,启动自适应跟踪器对故障进行跟踪。在理论上证明了该方案的鲁棒性、灵敏度和稳定性。最后通过仿真说明该方法的有效性。
The paper proposes a robust fault diagnosis scheme for an actuator bias in nonlinear- many- time- delay uncertain system. The nonlinearity is related to system inputs and outputs and uncertainties include states and outputs, System states and outputs are estimated by observer producing robust threshold, Adaptive tracker is designed and tracks fault if difference between system output and estimated output exceeds the threshold. The analyses of robustness, sensitivity and stability of the proposed ,scheme are given. The simulation results .show this method is feasible.
出处
《计算技术与自动化》
2006年第2期12-15,共4页
Computing Technology and Automation
基金
国家自然科学基金(60074013)
江苏省教育厅指导性资助项目(KK0310067)
扬州大学信息科学学科群基金(ISG030606)
关键词
故障诊断
非线性系统
多时滞
不确定性
鲁棒性
fault diagnosis
nonlinear system
many - time - delay
uncertainty
robustness
