Safe consensus tracking with guaranteed full state and input constraints: A control barrier function based approach

In this paper, we consider the safe consensus tracking problem for uncertain second-order nonlinear multi-agent systems subject to both position, velocity and input constraints. The agents are required to cooperatively track a desired leader's trajectory while always satisfying their local stat...

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Bibliographic Details
Published inIEEE transactions on automatic control Vol. 68; no. 12; pp. 1 - 8
Main Authors Fu, Junjie, Wen, Guanghui, Yu, Xinghuo
Format Journal Article
LanguageEnglish
Published New York IEEE 01.12.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
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Summary:In this paper, we consider the safe consensus tracking problem for uncertain second-order nonlinear multi-agent systems subject to both position, velocity and input constraints. The agents are required to cooperatively track a desired leader's trajectory while always satisfying their local state and input constraints. Therefore, conflicting objectives may exist for an agent when the desired trajectory violates its local constraints. We propose to solve this problem using a control barrier function based (CBF-based) approach. The cooperative tracking objective is encoded by a novel control Lyapunov function based (CLF-based) condition while the state and input constraints are handled by CBF-based constraints. For the relative degree two position constraint, two classes of CBF-based conditions are proposed based on high-order CBFs and a modified CBF design, respectively. It is proven that, with the modified CBF, there always exist feasible control inputs which satisfy all the CBF-based constraints. Then, unified quadratic programming (QP) based controllers are formulated and the performances are analyzed. Simulation examples are provided to verify the obtained results.
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content type line 14
ISSN:0018-9286
1558-2523
DOI:10.1109/TAC.2023.3283697