Adaptive Fault-Tolerant Stochastic Shape Control With Application to Particle Distribution Control
Adaptive Fault-Tolerant Stochastic Shape Control With Application to Particle Distribution Control
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DOI：
10.1109/tsmc.2015.2433896
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
Tao Li;Gang Li;Qing Zhao
中科院分区：
文献类型：
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作者：
Tao Li;Gang Li;Qing Zhao
研究了随机分布系统的容错形状控制问题。对于这个问题，除了可测量的输入信号，它是假设系统输出的分布函数可以评估，使它是可用的。它还假设，该系统是受致动器故障。在这种情况下，主要的控制目标是随机分布系统的输出跟踪给定的目标分布，即使在执行器故障的存在下。通过估计这些执行器故障，提出了一种有效的FTSC策略，它包括正常控制律和自适应补偿控制律。前者能在无故障情况下以最优性能指标跟踪给定的输出分布，而后者能自动减小（甚至消除）执行器故障带来的不利影响。该方法可用于输出概率密度函数的跟踪控制。为了验证该方法的有效性，对一个数值例子进行了仿真，得到了满意的结果。最后给出了一个岩土工程中颗粒级配控制的实例，结果表明该容错控制方案适用于实际的颗粒级配控制。
This paper investigates the fault-tolerant shape control (FTSC) problem for stochastic distribution systems. For this problem, in addition to measurable input signals, it is assumed that the distribution function of the system output can be evaluated so that it is available. It is also assumed that the system is subject to actuator faults. In this case, the main control objective is for the output of the stochastic distribution system to track a given target distribution even in the presence of actuator faults. By estimating these actuator faults, an effective FTSC strategy is proposed, which consists of a normal control law and an adaptive compensation control law. The former can track the given output distribution with an optimized performance index in the fault-free case, while the latter can automatically reduce (or even eliminate) the adverse effects caused by the actuator faults. The proposed method can be applied to tracking control of output probability density functions. To demonstrate the effectiveness of the proposed scheme, simulation is performed on one numerical example with satisfactory results obtained. In addition, a practical example of soil particle gradation control in geotechnical applications is given in this paper, and the results show that the proposed fault-tolerant scheme is applicable to practical particle size distribution control.