Prescribed finite-time consensus with severe unknown nonlinearities and mismatched disturbances

Shiqi Zheng, Choon Ki Ahn, Peng Shi, Yuanlong Xie

Research output: Contribution to journalArticlepeer-review

Abstract

This paper considers the problem of prescribed finite-time leader-following consensus for a class of second-order multi-agent systems (MAS). Compared to the existing methods, the dynamics of the followers in the proposed method is rather general, containing some severe unknown nonlinearities and mismatched disturbances. First, a time-varying distributed observer is proposed to estimate the leader information in prescribed finite time. The leader is driven by a control input that is unknown to all the followers. Then, a new composite controller with a time-varying disturbance observer is presented. By gracefully combining the barrier Lyapunov functions and logic-based switching rules, we show that the unknown nonlinearities and mismatched disturbances can be well handled. Thus, the prescribed finite-time consensus problem can be solved. Finally, by the properties of Lyapunov functions and time-varying gains, we present a new method to show that the control signals are bounded. A simulation example is provided to verify the effectiveness of the proposed method.

Original languageEnglish
Article number105047
JournalSystems and Control Letters
Volume157
DOIs
Publication statusPublished - 2021 Nov

Keywords

  • MAS
  • Prescribed finite-time consensus
  • Time-varying disturbance observer

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science(all)
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Prescribed finite-time consensus with severe unknown nonlinearities and mismatched disturbances'. Together they form a unique fingerprint.

Cite this