State and Disturbance Estimator for Time-Delay Systems With Application to Fault Estimation and Signal Compensation
State and Disturbance Estimator for Time-Delay Systems With Application to Fault Estimation and Signal Compensation
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DOI：
10.1109/tsp.2007.900154
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发表时间：
2007-12
影响因子：
5.4
通讯作者：
Zhiwei Gao;S. Ding
中科院分区：
文献类型：
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作者：
Zhiwei Gao;S. Ding
针对具有线性耦合输入和输出扰动的状态空间时滞系统，提出了一种状态和扰动同时估计的方法。对于具有相关输入和输出扰动的非线性状态空间时滞系统，提出了一种非线性估计器，可同时估计系统的状态和扰动。所提出的估计器技术应用于下一个估计系统的状态和故障信号。通过致动器和/或传感器信号补偿，可以实现简单且有效的容错操作。在所开发的设计中，所考虑的故障不需要任何限制和先验知识。此外，不需要相同的致动器和/或传感器开关和控制增益重构。因此，所提出的估计和容错方案是经济和方便的实际应用。在此基础上，将设计方法推广到具有一类非耦合输入输出故障的系统。仿真结果表明，该方法具有良好的信号估计和容错性能。
For a state-space time-delay system with linearly coupled input and output disturbances, a simultaneous state and disturbance estimation technique is developed. For a nonlinear state-space time-delay system with dependent input and output disturbances, a nonlinear estimator is also proposed to estimate system state and disturbance at the same time. The proposed estimator techniques are applied next to estimate system state and fault signal. Via actuator and/or sensor signal compensation, a simple and efficient fault-tolerant operation can be realized. In the developed design, no limitations and prior knowledge are required on the considered faults. Moreover, identical actuator and/or sensor switches and control gain reconstruction are not necessary. Therefore, the proposed estimation and fault-tolerant scheme is economical and convenient in practical applications. After that, the design techniques are extended to the case of systems with a class of uncoupled input and output faults. Examples and simulations given show excellent signal estimation and fault-tolerant performance.