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A multi-layer robust adaptive fault tolerant control system for high performance aircraft.

机译：高性能飞机的多层鲁棒自适应容错控制系统。

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摘要

Modern high-performance aircraft demand advanced fault-tolerant flight control strategies. Not only the control effector failures, but the aerodynamic type failures like wing-body damages often result in substantially deteriorate performance because of low available redundancy. As a result the remaining control actuators may yield substantially lower maneuvering capabilities which do not authorize the accomplishment of the air-craft's original specified mission. The problem is to solve the control reconfiguration on available control redundancies when the mission modification is urged to save the aircraft.;The proposed robust adaptive fault-tolerant control (RAFTC) system consists of a multi-layer reconfigurable flight controller architecture. It contains three layers accounting for different types and levels of failures including sensor, actuator, and fuselage damages. In case of the nominal operation with possible minor failure(s) a standard adaptive controller stands to achieve the control allocation. This is referred to as the first layer, the controller layer. The performance adjustment is accounted for in the second layer, the reference layer, whose role is to adjust the reference model in the controller design with a degraded transit performance. The upmost mission adjust is in the third layer, the mission layer, when the original mission is not feasible with greatly restricted control capabilities. The modified mission is achieved through the optimization of the command signal which guarantees the boundedness of the closed-loop signals. The main distinguishing feature of this layer is the the mission decision property based on the current available resources. The contribution of the research is the multi-layer fault-tolerant architecture that can address the complete failure scenarios and their accommodations in realities. Moreover, the emphasis is on the mission design capabilities which may guarantee the stability of the aircraft with restricted post-failure control capabilities. The implementation issues of the architecture are also addressed, with possible realizations and the feasibility analysis.
机译：现代高性能飞机需要先进的容错飞行控制策略。由于可用冗余度低，不仅控制执行器故障，而且空气动力类型的故障（如机翼损坏）通常会导致性能大大下降。结果，其余的控制致动器可能产生明显较低的操纵能力，这没有授权完成飞机的原始指定任务。问题在于解决在要求修改任务以节省飞机时对现有控制冗余的控制重配置问题。所提出的鲁棒自适应容错控制（RAFTC）系统由多层可重配置的飞行控制器架构组成。它分为三层，分别针对不同类型和级别的故障，包括传感器，执行器和机身损坏。在标称运行中可能出现轻微故障的情况下，标准的自适应控制器可以实现控制分配。这称为第一层，即控制器层。性能调整在第二层即参考层中进行，参考层的作用是在控制器设计中调整参考模型，从而降低传输性能。当原始任务在控制能力受到严格限制的情况下不可行时，最高的任务调整是在第三层即任务层。通过优化命令信号来实现修改后的任务，该命令信号保证了闭环信号的有界性。该层的主要区别特征是基于当前可用资源的任务决策属性。该研究的贡献是多层容错体系结构，它可以解决完整的故障场景及其在现实中的适应性。而且，重点在于任务设计能力，其可以通过有限的故障后控制能力来保证飞机的稳定性。还通过可能的实现和可行性分析解决了体系结构的实现问题。

著录项

  • 作者

    Huo, Ying.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Engineering Aerospace.;Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 101 p.
  • 总页数 101
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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