带有通讯约束的网络化控制系统容错控制技术研究

赵明月; 刘贺平; 李志军; 孙德辉

doi:10.3724/SP.J.1004.2012.01119

带有通讯约束的网络化控制系统容错控制技术研究

doi: 10.3724/SP.J.1004.2012.01119 cstr: 32138.14.SP.J.1004.2012.01119

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出版历程
- 收稿日期: 2010-10-22
- 修回日期: 2011-07-01
- 刊出日期: 2012-07-20

Fault Tolerant Control for Networked Control Systems with Access Constraints

摘要

摘要: 文中研究了针对具有通讯约束的网络化控制系统存在执行器增益故障的容错控制问题. 提出一种静态调度策略, 利用周期通讯序列的方法调度网络资源及网络可用通道. 该研究的创新处在于首先将具有周期通讯序列及执行器故障的网络化控制系统建模为一个周期的切换系统, 并提出了基于调度依赖的利亚普诺夫函数方法对系统容错控制器进行设计. 由于调度策略使得在每个采样时刻存在数据丢失, 文中分别利用0值和上一时刻采样值替代所丢失的数据. 更进一步的, 当考虑控制对象存在外界能量有界干扰时, 分别就上述两种情况讨论了其鲁棒容错控制器的设计问题. 最后, 通过仿真实例证明了所提方法的有效性.
- 容错控制 /
- 网络化控制系统 /
- 通讯约束 /
- 执行器故障
Abstract: In this paper, the problem of fault tolerant control (FTC) considering actuator fault for networked control systems (NCSs) with access constraints is addressed. A static scheduling method, periodic communication sequence (PCS), is applied to allocate network resource and schedule the access to the network. The novelty of this work lies in that the NCS with PCS and actuator fault are modeled as a periodic switching system and the schedule-dependent Lyapunov function method is used to design the fault tolerant controller. For the data packets dropped by scheduling strategy at each sampling time, 0 and the value of previous sampling time are respectively considered to recover them. Additionally, the problem of robust FTC for the controlled plant with external energy-bounded disturbance is also respectively discussed under these two situations. Numerical examples are given to illustrate the effectiveness of the proposed design methods.
- Fault tolerant control (FTC) /
- networked control system (NCS) /
- access constraints /
- actuator fault

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