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首页> 外文期刊>International Journal of Intelligent Computing and Cybernetics >Non-fragile robust H_∞ control of nonlinear networked control systems with time-varying delay and unknown actuator failures
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Non-fragile robust H_∞ control of nonlinear networked control systems with time-varying delay and unknown actuator failures

机译：时滞和未知执行器故障的非线性网络控制系统的非脆弱鲁棒H_∞控制

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Purpose - This paper is concerned with non-fragile robust H_∞ control problems for nonlinear networked control systems (NCSs) with time-varying delay and unknown actuator failures. The paper aims to discuss these issues. Design/methodology/approach - The system parameters are allowed to have time-varying uncertainties and the actuator faults are unknown but whose upper and lower bounds are known. By using some lemmas, uncertainties can be replaces with the known values. By taking the exogenous disturbance and network transmission delay into consideration, a delay nonlinear system model is constructed. Findings - Based on Lyapunov stability theory, linear matrix inequalities (LMIs) and free weighting matrix methods, the sufficient conditions for the existence of the non-fragile robust H_∞ controller gain are derived and which can obtained by solving the LMIs. Finally, a numerical example is provided to illustrate the effectiveness of the proposed methods. Originality/value - The introduced approach is interesting for NCSs with time-varying delay and unknown actuator failures.
机译：目的-本文涉及具有时变延迟和未知执行器故障的非线性网络控制系统（NCS）的非脆弱鲁棒H_∞控制问题。本文旨在讨论这些问题。设计/方法/方法-系统参数允许具有随时间变化的不确定性，并且执行器故障未知，但其上下限是已知的。通过使用一些引理，可以用已知值代替不确定性。考虑外部干扰和网络传输时延，构造了时滞非线性系统模型。发现-基于Lyapunov稳定性理论，线性矩阵不等式（LMI）和自由加权矩阵方法，得出了存在非脆弱鲁棒H_∞控制器增益的充分条件，并可以通过求解LMI来获得这些条件。最后，通过数值例子说明了所提方法的有效性。独创性/价值-引入的方法对于具有时变延迟和未知执行器故障的NCS很有用。

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