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Fault-tolerant control in complex systems with real-time applications.

机译：具有实时应用程序的复杂系统中的容错控制。

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摘要

Designing and implementing a fault-tolerant control (FTC) system for large-scale systems pose a great challenge due to the high dimensionality, multiple inputs and outputs, and processor limitations. In this study, the problem of designing and implementing a decentralized FTC system is considered for large-scale systems. The decentralized FTC system consists of three schemes: decentralized nominal controller, decentralized fault detection and isolation, and decentralized supervision scheme. The proposed approach overcomes the design and implementation complexities by dividing the total task of the FTC system into a number of small tasks. These small tasks can be easily implemented by running a number of commercial processors in parallel. The proposed design is applied to a typical large-scale system: a segmented telescope test bed, which consists of 6 segments giving an overall high order system. The decentralized FTC system consists of 6 local units, each one responsible for controlling one segment, detecting and isolating faults, and reconfiguring the controller for fault accommodation. The algorithm of the 6 local units is implemented by running 3 processors in parallel. Real-time results demonstrate the capability of the proposed decentralized FTC system to tolerate sensor failure in large-scale systems such as in the segmented telescope test bed. In addition, since designing an FTC system to recover the original system performance is impractical in many situations, due to the new physical constraints caused by the fault, designing an FTC system with the ability to comply with the new physical constraints is considered for a class of nonlinear systems subject to actuator saturation fault. The approach is based on the conceptual tools of linear matrix inequalities and on-line fault model estimation. The FTC system consists of nominal control, fault diagnostic, and fault accommodation schemes. These schemes are designed to: (1) achieve stability and tracking requirements; (2) detect, isolate, and estimate a fau and (3) reduce the fault effect on the system. A nonlinear model of an F16 aircraft longitudinal motion is used to demonstrate the effectiveness of the proposed FTC system.
机译：由于高维，多个输入和输出以及处理器的局限性，为大型系统设计和实现容错控制（FTC）系统构成了巨大的挑战。在这项研究中，设计和实现分散式FTC系统的问题被考虑用于大型系统。分散式FTC系统由三种方案组成：分散式标称控制器，分散式故障检测与隔离以及分散式监控方案。通过将FTC系统的总任务划分为许多小任务，所提出的方法克服了设计和实现的复杂性。通过并行运行许多商用处理器，可以轻松实现这些小任务。拟议的设计应用于典型的大型系统：分段式望远镜测试台，该测试台由6个分段组成，构成了整个高阶系统。分散式FTC系统由6个本地单元组成，每个本地单元负责控制一个网段，检测和隔离故障以及重新配置控制器以容纳故障。 6个本地单元的算法是通过并行运行3个处理器来实现的。实时结果证明了拟议的分散式FTC系统具有承受大规模系统（例如分段式望远镜测试台）中的传感器故障的能力。另外，由于在许多情况下设计FTC系统以恢复原始系统性能是不切实际的，由于故障引起的新的物理约束，因此考虑将某类FTC系统设计为能够满足新的物理约束。执行器饱和故障的非线性系统该方法基于线性矩阵不等式和在线故障模型估计的概念工具。 FTC系统由标称控制，故障诊断和故障适应方案组成。这些方案旨在：（1）达到稳定性和跟踪要求； （2）检测，隔离和评估故障； （3）减少故障对系统的影响。 F16飞机纵向运动的非线性模型用于证明所提出的FTC系统的有效性。

著录项

  • 作者

    Abdullah, Ali A.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 130 p.
  • 总页数 130
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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