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Robust fault diagnosis with disturbance rejection and attenuation for systems with multiple disturbances

Journal of Systems Engineering and Electronics 2011年第1期22卷 135-140页

作者： Songyin Cao Lei Guo Xinyu Wen School of Automation Southeast University Nanjing 210096 E R. China School of Instrumentation Science and Opto-Electronics Engineering Beihang University Beijing 100191 Po R. China

The fault diagnosis problem is investigated for a class of nonlinear neutral systems with multiple ***-varying faults are considered and multiple disturbances are supposed to include the unknown disturbance modeled by an exo-system and norm bounded uncertain disturbance.A nonlinear disturbance observer is designed to estimate the modeled ***,the fault diagnosis observer is constructed by integrating disturbance observer with disturbance attenuation and rejection *** augmented Lyapunov functional approach,which involves the tuning parameter and slack variable,is applied to make the solution of inequality more ***,applications for a two-link robotic manipulator system are given to show the efficiency of the proposed approach.

关键词： robust fault diagnosis observer design multiple disturbances anti-disturbance fault diagnosis disturbance rejection and attenuation.

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Consensus in multi-agent systems with multiple disturbances and time delay via proportional-integral control

Consensus in multi-agent systems with multiple disturbances ...

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第40届中国控制会议

作者： Fenglan Sun Yunhao Shen Key Laboratory of Intelligent Analysis and Decision on Complex Systems School of ScienceChongqing University of Posts and Telecommunications Key Laboratory of Intelligent Air-Ground Cooperative Control for Universities in Chongqing College of AutomationChongqing University of Posts and Telecommunications Potsdam Institute for Climate Impact Research

This paper studies the consensus in multi-agent systems with multiple disturbances and time delay over fixed and switching topology via proportional-integral control. The controller that includes proportional and integral actions is *** adopting matrix theory, algebraic graph theory and Lyapunov stability theory, sufficient conditions for consensus are obtained. Several numerical simulations are given to verify the effectiveness of the algorithms.

关键词： consensus multiple disturbances switching topology proportional-integral control

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Composite anti-disturbance resilient control for Markovian jump nonlinear systems with general uncertain transition rate

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Science China(Information Sciences) 2019年第2期62卷 101-118页

作者： Guangdeng ZONG Yankai LI Haibin SUN School of Engineering Qufu Normal University

In this paper, the issue of disturbance observer based resilient control is addressed for Markovian jump nonlinear systems with multiple disturbances and general uncertain transition rates. The disturbances are divided into two parts: one has a bounded H2 norm, and the other is given by an exogenous system. The general uncertain transition rate matrix is composed of unknown elements and uncertain ones. The uncertain transition rate only has a known approximate range. First, the disturbance described by the exogenous system is estimated by a disturbance observer, and its estimation is used for the controller as feedforward compensation. Subsequently, by using the resilient control method, a composite anti-disturbance resilient controller is constructed to guarantee stochastic stability with L2-L∞performance of the closed-loop systems. Subsequently, the Lyapunov stability method and linear matrix inequality technique are applied to obtain the controller gain. Finally, an application example is provided to illustrate the effectiveness of the proposed approach.

关键词： composite anti-disturbance control resilient controller Markovian jump nonlinear systems general uncertain transition probabilities multiple disturbances L2-L∞ performance

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Fault-Tolerant Control Based on Disturbance Observer for Stochastic Systems 36

Fault-Tolerant Control Based on Disturbance Observer for Sto...

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第36届中国控制会议

作者： Shixiang Sun Xinjiang Wei School of Mathematics and Statistics Science Ludong University

ISBN: (纸本)9781538629185

An anti-disturbance fault tolerant control(FTC) based on disturbance observer scheme is considered for a class of stochastic systems with faults and multiple disturbances in this paper. The disturbances are divided into two parts. One represents the stochastic disturbance with partial-known information which is formulated by an exogenous system. The other is independent Wiener process. A stochastic disturbance observer is designed to estimate exogenous disturbance using pole placement. And a composite fault diagnosis observer with disturbance observer is constructed to diagnose faults. Furthermore, a composite faulttolerant controller is proposed to compensate modeled disturbance and accommodate faults. Finally, a simulation example is given to demonstrate the feasibility and effectiveness of the proposed scheme.

关键词： multiple disturbances Fault diagnosis observer Stochastic disturbance observer Composite Fault-Tolerant Controller based on disturbance observer

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Disturbance Observer-Based Disturbance Attenuation Control for A Class of Stochastic Systems with Nonlinear Exosystem and White Noises

Disturbance Observer-Based Disturbance Attenuation Control f...

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第30届中国控制与决策会议

作者： Lewei Dong Xinjiang Wei School of Mathematics and Statistics Science Ludong University

This paper studies a class of stochastic systems with multiple disturbance, which includes white noises and disturbances modeled by a nonlinear exogenous system. To estimate the disturbance with nonlinear dynamics, a stochastic nonlinear disturbance observer is proposed. Based on the observer, a nonlinear disturbance observer-based disturbance attenuation control（NDOBDAC） scheme is constructed such that the composite closed-loop system is asymptotically bounded in mean square. Finally, a simulation example is given to demonstrate the feasibility and effectiveness of the proposed scheme.

关键词： Stochastic system multiple disturbances NDOBDAC Nonlinear exosystem

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Robust Adaptive Fault Diagnosis Approach Based on Disturbance Observer

Robust Adaptive Fault Diagnosis Approach Based on Disturbanc...

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第三十届中国控制会议

作者： CAO Songyin~1,GUO Lei~2,YI Yang~1 1.Department of Automation,College of Information Engineering,Yangzhou University,Yangzhou,225127,P.R.China. 2.Science and Technology on Aircraft Control Laboratory,Beihang University,Beijing,100191,P.R.China.

In this paper,an anti-disturbance fault diagnosis scheme is addressed for a class of systems with both faults and multiple *** first part of the disturbances is the uncertain modeled disturbances and the second one represents an uncertain variable bounded by an unknown constant.A composite observer with adaptive compensation is designed to estimate the uncertain modeled disturbance and fault *** analysis for the estimation error system is ***, simulation is given to show the efficiency of the proposed approach.

关键词： Fault diagnosis multiple disturbances Anti-disturbance Disturbance observer Adaptive

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Composite Hierarchical Control for Magnetic Bearing Based on Disturbance Observer

Composite Hierarchical Control for Magnetic Bearing Based on...

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第二十九届中国控制会议

作者： WEN Xinyu1,GUO Lei2 1.Research Institute of Automation,Southeast University,Nanjing 210096,P.R.China2.School of Instrument Science and Opto-Electronics Engineering,Beihang University,Beijing,100191,P.R.China

This paper concerns a class of MIMO system disturbance attenuation and rejection problem for magnetic bearing *** disturbance is formulated as a hierarchical one with two different *** first part is described by an exogenous model,while the second one is uncertain but bounded *** consideration of this,a new composite control scheme is presented,a nonlinear tracking differentiator is utilized to estimate system state firstly,by which a nonlinear disturbance observer（DO）for modeled part is designed and then integrate DO with a robust controller to reject the unknown equivalent *** is shown that with the proposed controller the closed-loop system is uniformly ultimately bounded（UUB）based on Lyapunov ***,simulations for a magnetic bearing control system shows that by integrating the disturbance observer with conventional control laws,the synchronous vibration caused by unbalance on a rotor can be rejected and the desired dynamic performances can be guaranteed.

关键词： Disturbance Observer H∞Control multiple disturbances

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