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首页> 外文期刊>Control Theory & Applications, IET >Fuzzy logic systems-based integral sliding mode fault-tolerant control for a class of uncertain non-linear systems
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Fuzzy logic systems-based integral sliding mode fault-tolerant control for a class of uncertain non-linear systems

机译：一类不确定非线性系统基于模糊逻辑系统的积分滑模容错控制

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This study proposes an integral sliding mode control (ISMC) scheme for a class of uncertain non-linear systems subject to actuator faults including outage. It is noted that traditional ISMC method cannot handle actuator outage. To tackle the problem, matrix full-rank factorisation technique and adaptive mechanism are incorporated. Based on the above technique, two novel integral sliding surfaces using construction methods I and II are then introduced and existence conditions of sliding modes are given in terms of linear matrix inequalities, in which less conservativeness and better robustness against actuator faults are obtained using construction method II than I. The fuzzy logic systems are applied to approximate the bounds of unknown non-linear functions. Furthermore, an integral sliding mode controller, without an fault detection and isolation mechanism, is synthesised to guarantee the asymptotic stability and the robustness of the closed-loop system against actuator faults and non-linearities from the every beginning. Finally, simulation results for a model of B747-100/200 aircraft confirm the effectiveness of the proposed control method.
机译：这项研究为一类不确定的非线性系统提出了积分滑模控制（ISMC）方案，该系统受执行器故障（包括停机）的影响。注意，传统的ISMC方法无法处理执行器故障。为了解决该问题，结合了矩阵满秩分解技术和自适应机制。基于上述技术，介绍了两种使用构造方法I和II的新型整体滑动表面，并根据线性矩阵不等式给出了滑模的存在条件，其中使用构造方法可获得较少的保守性和更好的针对执行器故障的鲁棒性II比I。模糊逻辑系统应用于近似未知非线性函数的边界。此外，集成了无故障检测和隔离机制的集成滑模控制器，以确保闭环系统的渐近稳定性和鲁棒性，从一开始就针对执行器故障和非线性问题。最后，B747-100 / 200飞机模型的仿真结果证实了所提出的控制方法的有效性。

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