Fuzzy state/disturbance observer design for T-S fuzzy systems with application to sensor fault estimation
Fuzzy state/disturbance observer design for T-S fuzzy systems with application to sensor fault estimation
复制标题
T-S 模糊系统的模糊状态/干扰观测器设计及其在传感器故障估计中的应用
DOI：
10.1109/tsmcb.2008.917185
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发表时间：
2008-06-01
影响因子：
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通讯作者：
Ding, Steven X.
中科院分区：
文献类型：
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作者：
Gao, Zhiwei;Shi, Xiaoyan;Ding, Steven X.
针对具有未知输出扰动的Takagi-Sugeno模糊模型，提出了一种新的模糊观测器设计方法。为了对未知的输出扰动进行解耦，将扰动作为一个辅助状态向量，构造了一个增广模糊描述子模型。其次，为增广模糊广义系统设计了模糊状态空间观测器，从而获得了原始状态和扰动的同时估计。所提出的观测器技术进一步应用于估计传感器故障。最后给出了一个数值例子来说明设计过程，仿真结果表明了预期的跟踪性能。对扰动和故障的预知对于我们的设计是不必要的。此外，所考虑的干扰和传感器故障可以是任何形式。
A novel fuzzy-observer-design approach is presented for Takagi-Sugeno fuzzy models with unknown output disturbances. In order to decouple the unknown output disturbance, an augmented fuzzy descriptor model is constructed by supposing the disturbance to be an auxiliary state vector. A fuzzy state-space observer is next designed for the augmented fuzzy descriptor system, and the simultaneous estimates of the original state and disturbance are thus obtained. The proposed observer technique is further applied to estimate sensor faults. Finally, a numerical example is given to illustrate the design procedure, and the simulation results show the desired tracking performance. The preknowledge of the disturbance and fault is not necessary for our design. Moreover, the considered disturbance and sensor fault can he in any form.