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第36届中国控制会议

作者： Kui Ding Wu-Hua Chen Xiaomei Lu Zhen Ruan College of Mathematics and Information Science Guangxi University

ISBN: (纸本)9781538629185

This paper treats the control problem of a class of nonlinear stochastic systems with unknown external disturbance and periodically intermittent measurement. It is assumed that the external disturbance is generated by an exogenous system with unknown initial condition, and the state information ia available only on some disconnected time intervals. A composite control method using the intermittent state information is proposed, which consists of an intermittent feedback control law and a disturbance observer. The stability property of the closed-loop error system is analyzed using a piecewise-time-dependent Lyapunov function approach. Then, a sufficient condition for the existence of the desired composite controllers is derived in terms of matrix inequalities. Finally, a numerical example is given to illustrate the effectiveness of the proposed result.

关键词： disturbance observer-based control Periodically intermittent measurement Piecewise time-dependent Lyapunov function Linear matrix inequalities(LMIs)

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Data-driven disturbance observer-based control: an active disturbance rejection approach

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control Theory and Technology 2021年第1期19卷 80-93页

作者： Harvey Rojas-Cubides John Cortés-Romero Jaime Arcos-Legarda Deparameno de Ingeniera Elétricay Electrónica Universidad Nacional de ColombiaAv.K30 No.45-03 Edif.453 Of.222BogoiáColombia Department of Mechatromies Engineering Universidad de San BuenaventuraBogotá.Colombia

In this paper,a data-driven method for disturbance estimation and rejection is *** proposed approach is divided into two stages:an inner stabilization loop,to set the desired reference model,together with an outer loop for disturbance estimation and *** by the active disturbance rejection control framework,the exogenous and endogenous disturbances are lumped into a lotal disturbance *** signal is estimaed using an on-line algorithm based on a data-driven predictor scheme,whose parameters are chosen Io salisfy high robustnessperformance *** above process is presented as a novel enhancement lo design a disturbance observer,w hich constitutes the main contribution of the *** addition,the control strategy is completely presented in discrete time,avoiding the use of discretization methods for its digital *** a case study,the voltage control of a DC-DC synchronous buck converter aflected by disturbances in the input voltage and the load is ***,experimental results that validate the proposed stralegy and some comparisons with the classical disturbance observer-based control are presented.

关键词： Active disturbance rejection control Data-driven disturbance observer disturbance observer-based control Signal prediction

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Fixed-time Consensus control for Nonlinear Multi-Agent Systems based on Sliding Mode disturbance observer

Fixed-time Consensus Control for Nonlinear Multi-Agent Syste...

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第43届中国控制会议

作者： Yixi Yang Bin Xin Yingmei He School of Automation Beijing Institute of Technology National Key Lab of Autonomous Intelligent Unmanned Systems

This paper investigates consensus tracking control for nonlinear multi-agent systems with unknown *** introducing an auxiliary dynamic system, a fixed-time sliding mode disturbance observer is proposed to estimate the actual unknown disturbance. Additionally, a chattering-free term is added to the observer to reduce system chattering. The observerbased consensus controller is proposed to suppress the influence of disturbances and ensure the closed-loop system satisfies practical fixed-time stability. Finally, a series of simulation examples is provided to demonstrate the effectiveness of the proposed method.

关键词： Fixed-time consensus control disturbance observer chattering-free disturbance observer-based control

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