执行器饱和NCS的满意容错与通信的协同设计

发布时间：2018-05-30 22:06

本文选题：满意容错控制 + 网络化控制系统　；参考：《华中科技大学学报(自然科学版)》2017年01期

【摘要】：基于离散事件触发通信机制(DETCS),研究了非均匀传输周期下具有执行器饱和的网络化控制系统(NCS)的满意容错与网络通信间的协同设计问题.通过将保持器端数据的非均匀更新周期对系统性能的影响转化到对系统时滞的影响中,建立了一个具有执行器饱和的闭环故障NCS模型,该模型将建模中的多个因素集成在一个框架下,如执行器饱和约束、执行器失效、事件触发条件、非均匀传输周期、传输时延、计算时延和控制器信息等.基于不连续的Lyapunov-Krasovskii函数、互反凸技术、线性凸组合技术及琴生不等式,为具有多种性能的闭环故障系统提出了网络通信与满意容错间的协同设计方法.借助仿真算例,验证了提出的协同设计方法的有效性,此外还对不同性能指标和DETCS中的触发参数间的相容性进行了分析.
[Abstract]:Based on discrete event triggered communication mechanism (DETCSN), the satisfactory fault-tolerance and cooperative design of networked control system (NCSs) with actuator saturation in non-uniform transmission period are studied. A closed-loop fault NCS model with actuator saturation is established by transforming the effect of non-uniform update period on system performance to the influence on system delay. In this model, many factors in modeling are integrated into one framework, such as actuator saturation constraint, actuator failure, event trigger condition, non-uniform transmission period, transmission delay, computational delay and controller information. Based on discontinuous Lyapunov-Krasovskii function, reciprocal convexity technique, linear convex combination technique and Jean's inequality, a cooperative design method between network communication and satisfactory fault tolerance is proposed for closed-loop fault systems with various performances. The effectiveness of the proposed collaborative design method is verified by a simulation example. In addition, the compatibility between different performance indexes and trigger parameters in DETCS is analyzed.
【作者单位】：兰州理工大学电气工程与信息工程学院;
【基金】：国家自然科学基金资助项目(61364011;61463030)
【分类号】：TP273

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