Adaptive NN fault-tolerant control for discrete-time systems in triangular forms with actuator fault

Adaptive NN fault-tolerant control for discrete-time systems in triangular forms with actuator fault
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具有执行器故障的三角形式离散时间系统的自适应神经网络容错控制

DOI:
10.1016/j.neucom.2014.10.076
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发表时间:
2015-03
期刊:
影响因子:
6
通讯作者:
Zhang Huaguang
Zhang Huaguang
中科院分区:
计算机科学2区
文献类型:
--
作者:
Liu Lei;Wang Zhanshan;Zhang Huaguang

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研究了一类不确定三角形多输入单输出离散时间系统的自适应执行器故障补偿控制问题。所考虑的执行器故障既包括有效性损失,也包括锁定到位。利用径向基函数神经网络逼近未知非线性函数,设计了一种自适应容错控制方案。与已有的一些方法相比,该方法的特点之一是引入了反推技术来实现容错控制任务。证明了所提出的控制方法能够保证闭环系统的所有信号一致最终有界,并且在执行器故障存在的情况下,输出能够跟踪参考信号。最后,给出了三个仿真结果,验证了容错控制方法的有效性。
This paper investigates the adaptive actuator fault compensation control for a class of uncertain multi-input single-out discrete-time systems with triangular forms. The considered actuator faults contain both loss of effectiveness and lock-in-place. With the help of radial basis function neural networks to approximate the unknown nonlinear functions, an adaptive fault tolerant control scheme is designed. Compared with some existing methods, one of features of the proposed method is that we introduce the backstepping technique to achieve the fault-tolerant control task. It is proved that the proposed control approach can guarantee that all the signals of the closed-loop systems are uniformly ultimately bounded and that the output can track a reference signal in the presence of the actuator faults. Finally, three simulation results are provided to confirm the effectiveness of the fault-tolerant control approach.
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