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Actuator Fault Tolerant Control Proposal for PI Controlled SISO Systems ?

机译:PI控制的SISO系统的执行器容错控制建议

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In this work, we develop a control structure which can be added to an existing closed loop in order to mitigate the effect of actuator faults. We analyze the initial performance of the closed loop in terms of robustness and time response under references, faults and measurement noises. In the design of the proposed active fault tolerant control structure, we keep the initial robustness and time response to references. At the same time, we try to improve some performance indices under faults at the cost of a higher control action activity caused by the measurement noises that affect the system. The design of the controller depends on a unique parameter so it can be easily understood. We show that although the response under step faults becomes oscillatory, the active fault tolerant structure reduces the integral of the absolute value of the tracking error under step faults and it attenuates the effect of ramp faults in steady state. Several examples show the goodness and drawbacks of the approach and show some aspects to be considered in the design.
机译:在这项工作中,我们开发了一种控制结构,可以将其添加到现有的闭环中,以减轻执行器故障的影响。我们根据参考,故障和测量噪声下的鲁棒性和时间响应来分析闭环的初始性能。在提出的主动容错控制结构的设计中,我们保持了初始鲁棒性和对参考的时间响应。同时,我们尝试改善故障下的一些性能指标,但代价是由于影响系统的测量噪声所引起的控制作用较高。控制器的设计取决于唯一的参数,因此很容易理解。我们表明,尽管阶跃故障下的响应变得振荡,但主动容错结构降低了阶跃故障下跟踪误差的绝对值的积分,并且减弱了稳态下斜坡故障的影响。几个示例显示了该方法的优缺点,并显示了设计中需要考虑的一些方面。

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