Journal of shanghai Jiaotong University (Science) ›› 2017, Vol. 22 ›› Issue (2): 240-246.doi: 10.1007/s12204-017-1827-3

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Sliding Mode Robust Fault-Tolerant Control for Uncertain Systems with Time Delay

Sliding Mode Robust Fault-Tolerant Control for Uncertain Systems with Time Delay

YANG Pu* (杨蒲), NI Jiangfan (倪江帆), PAN Xu (潘旭), GUO Ruicheng (郭瑞诚)   

  1. (Academy of Automation, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China)
  2. (Academy of Automation, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China)
  • Online:2017-03-31 Published:2017-04-04
  • Contact: YANG Pu (杨蒲) E-mail:ppyang@nuaa.edu.cn

Abstract: Considering the modeling uncertainties and external disturbance, a kind of sliding mode robust H∞ fault-tolerant control method for time delay system with actuator fault is proposed. The upper-bound of the uncertainties is considered as a known constant, while the upper-bound of the actuator fault is unknown. A sufficient condition for the existence of an integral sliding mode dynamics is given in terms of linear matrix inequality (LMI). A novel adaptive law is given to estimate the unknown upper-bound of faults. On this basis, a type of sliding mode robust H∞ fault-tolerant control law is designed to guarantee the asymptotic stability and the H∞ performance index of the system. Finally, the simulation on quad-rotor semi-physical platform demonstrates the reliability and validity of the method.

Key words: fault-tolerant control| sliding mode control| time delay| robust H∞

摘要: Considering the modeling uncertainties and external disturbance, a kind of sliding mode robust H∞ fault-tolerant control method for time delay system with actuator fault is proposed. The upper-bound of the uncertainties is considered as a known constant, while the upper-bound of the actuator fault is unknown. A sufficient condition for the existence of an integral sliding mode dynamics is given in terms of linear matrix inequality (LMI). A novel adaptive law is given to estimate the unknown upper-bound of faults. On this basis, a type of sliding mode robust H∞ fault-tolerant control law is designed to guarantee the asymptotic stability and the H∞ performance index of the system. Finally, the simulation on quad-rotor semi-physical platform demonstrates the reliability and validity of the method.

关键词: fault-tolerant control| sliding mode control| time delay| robust H∞

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