An active disturbance rejection control strategy fusing preset time mechanism
By constructing a pre-defined time-extended state observer and a non-singular feedback control law, the problems of convergence and singular control input in traditional active disturbance rejection control within a pre-defined time are solved, achieving system convergence and stability within a pre-defined time, which is applicable to second-order uncertain systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DALIAN NEUSOFT UNIV OF INFORMATION
- Filing Date
- 2026-05-27
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional active disturbance rejection control (ADRC) is difficult to converge within a preset time and may introduce singularity problems in the control input near the preset time point, especially when there are unknown lumped disturbances, it is difficult to achieve the preset time performance.
A pre-defined time-expanded state observer is constructed, and a non-singular pre-defined time feedback control law is designed. Through the non-singular pre-defined time trajectory function and the pre-defined time feedback control law, online estimation and compensation of lumped disturbances are achieved, ensuring that the system converges within a pre-defined time and avoiding singular control inputs.
It achieves system convergence within a preset time, the closed-loop system error is globally consistent and asymptotically stable, and the control input remains bounded around the preset time point, making it suitable for engineering applications.
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Figure CN122411047A_ABST