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Volume 11 Issue 3
Mar.  2024

IEEE/CAA Journal of Automatica Sinica

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Article Navigation >  IEEE/CAA Journal of Automatica Sinica  > 2024  >  11(3): 569-580
Z. Shao, Y. Wang, Z. Li, and  Y. Song,  “Dynamic constraint-driven event-triggered control of strict-feedback systems without max/min values on irregular constraints,” IEEE/CAA J. Autom. Sinica, vol. 11, no. 3, pp. 569–580, Mar. 2024. doi: 10.1109/JAS.2023.123804
Citation: Z. Shao, Y. Wang, Z. Li, and  Y. Song,  “Dynamic constraint-driven event-triggered control of strict-feedback systems without max/min values on irregular constraints,” IEEE/CAA J. Autom. Sinica, vol. 11, no. 3, pp. 569–580, Mar. 2024. doi: 10.1109/JAS.2023.123804
shu

Dynamic Constraint-Driven Event-Triggered Control of Strict-Feedback Systems Without Max/Min Values on Irregular Constraints

doi: 10.1109/JAS.2023.123804
Funds:  This work was supported in part by the National Key Research and Development Program of China (2023YFA1011803), the National Natural Science Foundation of China (62273064, 61933012, 62250710167, 61860206008, 62203078), and the Central University Project (2021CDJCGJ002, 2022CDJKYJH019, 2022CDJKYJH051)
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    Abstract

  • This work proposes an event-triggered adaptive control approach for a class of uncertain nonlinear systems under irregular constraints. Unlike the constraints considered in most existing papers, here the external irregular constraints are considered and a constraints switching mechanism (CSM) is introduced to circumvent the difficulties arising from irregular output constraints. Based on the CSM, a new class of generalized barrier functions are constructed, which allows the control results to be independent of the maximum and minimum values (MMVs) of constraints and thus extends the existing results. Finally, we proposed a novel dynamic constraint-driven event-triggered strategy (DCDETS), under which the stress on signal transmission is reduced greatly and no constraints are violated by making a dynamic trade-off among system state, external constraints, and inter-execution intervals. It is proved that the system output is driven to close to the reference trajectory and the semi-global stability is guaranteed under the proposed control scheme, regardless of the external irregular output constraints. Simulation also verifies the effectiveness and benefits of the proposed method.

     

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    Highlights

    • the proposed constraints switching mechanism is capable of converting irregular constraints into regular constraints while essentially not imposing additional constraining effects on the system output
    • unlike most existing works considering positive-negative alternating constraints, here in this work the maximum and minimum values of constraints are not in need
    • in contrast to the particular barrier function, a general barrier function is constructed in this work, which allows the designed control scheme to be more complete
    • compared to the relative threshold strategy, the dynamic constraint-driven event-triggered strategy is introduced here, resulting in a more intelligent control method

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