Search results for: Guanghui Sun

Items from 1 to 20 out of 53 results

article

Direct evidence for hydrated protons as the active species in artificial photocatalytic water reduction into hydrogen

Feng Xiong, Zhengming Wang, Zongfang Wu, Guanghui Sun, more

Science China Chemistry > 2019 > 62 > 2 > 199-204

Photocatalytic water reduction to hydrogen over oxide semiconductors is one of the most extensively investigated artificial photocatalytic reactions, but the nature of the active species has not yet been elucidated. Here, we successfully prepared Pt/rutile TiO₂110) surfaces with hydrated proton species via co-adsorption of hydrogen and water and observed the photocatalytic reduction of hydrated protons...

article

Finite Frequency Vibration Suppression for Space Flexible Structures in Tip Position Control

Shidong Xu, Guanghui Sun, Zhan Li

International Journal of Control, Automation and Systems > 2018 > 16 > 3 > 1021-1029

This paper presents a novel control strategy for the tip position and vibration control of a class of space flexible structures. The proposed control algorithm consists of finite frequency H_∞ vibration control technique and fractional-order PD^v control technique. More specially, a new finite frequency H_∞ controller working in the inner feedback loop is proposed to suppress vibration modes and external...

article

Quasi‐Time‐Dependent $H_{\infty}$ Controller for Discrete‐Time Switched Linear Systems With Mode‐Dependent Average Dwell‐Time

Hui Zheng, Guanghui Sun, Yu Ren, Congcong Tian

Asian Journal of Control > 20 > 1 > 263 - 275

This paper is concerned with the stability and stabilization problem of a class of discrete‐time switched systems with mode‐dependent average dwell time (MDADT). A novel Lyapunov function, which is both mode‐dependent (MD) and quasi‐time‐dependent (QTD), is established. The new established Lyapunov function is allowed to increase at some certain time instants. A QTD

H_{\infty}

controller is designed such...

article

Practical Tracking Control of Linear Motor With Adaptive Fractional Order Terminal Sliding Mode Control

Guanghui Sun, Zhiqiang Ma

IEEE/ASME Transactions on Mechatronics > 2017 > 22 > 6 > 2643 - 2653

This paper proposes a practical adaptive fractional order (FO) terminal sliding mode control (SMC) strategy for tracking control of the linear motor. Compared with conventional fast nonsingular SMC, the proposed approach, with a FO integral sliding surface and the adaptive switching input, can obtain higher convergence precision, even though the motion control system suffers from system uncertainties...

article

Weighted‐average ℓ₁ filtering for switched positive systems

Yu Ren, Guanghui Sun, Zhiguang Feng, Meng Joo Er, more

International Journal of Robust and Nonlinear Control > 27 > 18 > 5097 - 5112

In this paper, the filtering problem for a class of switched positive systems with dwell time is investigated. A novel weighted‐average technique is proposed for filter design such that the final estimate of the unmeasurable outputs of the considered system is more accurate than that of traditional approaches. The main contributions of this paper are summarized as follows: By exploiting the positivity...

article

Switched systems with average dwell time: Computation of the robust positive invariant set

Yu Ren, Meng Joo Er, Guanghui Sun

Automatica > 2017 > 85 > C > 306-313

In this paper, computational results of robust positive invariant (RPI) sets for switched systems with amplitude bounded, persistent, additive disturbance and average dwell time (ADT) switching are developed. Towards this end, new idea for facilitating the analysis of the ADT switching signal is conceptualized by a series of predefined stages and sufficient conditions for the existence of an ADT RPI...

article

Finite-time robust fuzzy control for non-linear Markov jump systems under aperiodic sampling and actuator constraints

Shidong Xu, Guanghui Sun, Zhan Li, Hui Zheng

IET Control Theory & Applications > 2017 > 11 > 15 > 2419 - 2431

This study investigates the fuzzy control problem for a class of non-linear Markov jump systems with sampled-data inputs and actuator constraints over a finite-time interval. Takagi–Sugeno (T–S) fuzzy models are employed to approximate the non-linearity. The partly known transition probability matrix consisting of known, uncertain, and unknown elements is considered. The asynchronous errors of the...

chapter

Fractional order sliding mode control for attitude and altitude stabilization of a quadrotor UAV

Zhihao Cheng, Zhiqiang Ma, Guanghui Sun, Hanlin Dong

2017 Chinese Automation Congress (CAC) > 2651 - 2656

2017 Chinese Automation Congress (CAC)

This paper presents a novel fractional order sliding mode control strategy for a quadrotor unmanned aerial vehicle attitude and altitude stabilization. A saturated dynamic model is first obtained via Euler-Lagrange mechanics and coordinate translation. By introducing fractional order calculus, the newly presented control law can achieve fast convergence speed. In addition, with the help of bounded...

chapter

Simulations of friction models for linear motors

Zhian Kuang, Zhiyuan Yu, Yuping Huang, Guanghui Sun

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society > 7569 - 7573

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

In this paper, three different models of friction in presliding regime on linear motor platform are deduced according to basic physical laws, which are named as the Kelvin model, the modified Kelvin model and the four-element model. To validate the effectiveness of these models, the particle swarm optimization is applied to determine the coefficients in each model. Then experiments of ramp input force...

chapter

A robust level set method with Markov random fields term and fractional-order regularization term

Hao Sun, Weihua Liu, Guanghui Sun, Xianqiang Yang, more

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society > 7073 - 7078

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

In this paper, a robust level set method is proposed for image segmentation. Traditional level set methods are sensitive to noise in images which greatly limits its application in real project. To overcome this shortcoming, the fractional order regularization and Markov random fields term are incorporated into the traditional level methods in this paper. The fractional order regularization can reveal...

article

Observer-based stabilization for switched positive system with mode-dependent average dwell time

Yu Ren, Guanghui Sun, Zhiguang Feng

ISA Transactions > 2017 > 70 > C > 37-45

This paper concerns the exponential stabilization problem for a class of switched positive systems. The switching signal satisfies mode-dependent average dwell time (MDADT) and the state variables are partially unmeasurable. A further explanation of mode-dependent average dwell time is included. By employing a set of quasi-time variables, which is first proposed for switched systems with MDADT, new...

article

Constraint admissible state sets for switched systems with average dwell time

Yu Ren, Meng Joo Er, Guanghui Sun

Automatica > 2017 > 82 > C > 235-242

The exact computational problem of λ -constrained admissible average dwell time (CAADT) contractive set and CAADT invariant set for discrete-time switched systems with and without persistent amplitude-bounded additive disturbance is investigated in this paper. The considered switching signal satisfies average dwell time (ADT) and is discussed in terms of stage which is both length-based and sequence-based...

chapter

Linear motor motion control using fractional order sliding mode controller with friction compensation

Zhiqiang Ma, Guanghui Sun, Zhihao Cheng, Zhengkai Li

2017 36th Chinese Control Conference (CCC) > 3610 - 3614

2017 36th Chinese Control Conference (CCC)

This paper presents a fractional order sliding mode control for motion control of linear motor. Due to global memory characteristics and actual nature expression, fractional calculus is introduced into the design of sliding mode surface to achieve precision tracking of reference signals, and it is first to design a fractional order sliding mode controller for linear motor motion. LuGre model is employed...

article

Dynamic adaptive saturated sliding mode control for deployment of tethered satellite system

Zhiqiang Ma, Guanghui Sun, Zhengkai Li

Aerospace Science and Technology > 2017 > 66 > C > 355-365

This paper presents a novel adaptive dynamic sliding mode scheme for the deployment of the tethered satellite system. To overcome the limited inputs of the dynamic model, a new scalable dimensionless transformation and strictly bounded terms are designed, which guarantee the existence of the ratio between limited inputs and command signals. The adaptive saturated sliding mode control scheme is proposed...

article

Structural Dependence of Competitive Adsorption of Water and Methanol on TiO₂ Surfaces

Zhengming Wang, Feng Xiong, Guanghui Sun, Yuekang Jin, more

Chinese Journal of Chemistry > 35 > 6 > 889 - 895

Employing TiO₂ anatase (001)‐(1 × 4), rutile (110) and rutile (011)‐(2 × 1) single crystal surfaces, we comprehensively studied the effects of TiO₂ surface structures on the competitive adsorption of water and methanol by means of low energy electron diffraction, thermal desorption spectra and X‐ray photoelectron spectroscopy. The relative adsorption strengths of chemisorbed methanol and water vary...

chapter

Fractional order modeling and residual vibration suppression for flexible two-mass system

Shidong Xu, Guanghui Sun, Zhihao Cheng

2017 29th Chinese Control And Decision Conference (CCDC) > 3658 - 3664

2017 29th Chinese Control And Decision Conference (CCDC)

This paper develops a novel fractional order model for a flexible two-mass system and proposes a fractional order controller to suppress residual vibration of this system. Based on fractional order constitutive law of viscoelastic material, a generic fractional order dynamic model has been derived for a flexible two-mass system, ranging from the pure elastic solids to the pure viscous materials. To...

article

Finite-Time Fuzzy Sampled-Data Control for Nonlinear Flexible Spacecraft With Stochastic Actuator Failures

Guanghui Sun, Shidong Xu, Zhan Li

IEEE Transactions on Industrial Electronics > 2017 > 64 > 5 > 3851 - 3861

This paper deals with the problem of finite-time sampled-data control for nonlinear flexible spacecraft described by Takagi–Sugeno (T–S) fuzzy model with stochastic actuator failures. Different from the existing literatures, T–S fuzzy approach is used to model the nonlinear behaviors of flexible spacecraft for its good approximation performance. A novel and general input model related to Markovian...

article

Fault‐Tolerant Finite Frequency H_∞ Control for Uncertain Mechanical System with Input Delay and Constraint

Shidong Xu, Guanghui Sun, Weichao Sun

Asian Journal of Control > 19 > 2 > 765 - 780

In this paper, a novel fault‐tolerant finite frequency H_∞ controller (FFHC) is developed for uncertain mechanical system with input delay and constraint. First, the mathematical model of uncertain mechanical system is derived, where the uncertainties occur in mass, damping and stiffness matrices, respectively. Then, in view of the fact that the dominant resonance energies are caused by low‐order vibration...

article

Fuzzy logic based fault-tolerant attitude control for nonlinear flexible spacecraft with sampled-data input

Shidong Xu, Guanghui Sun, Weichao Sun

Journal of the Franklin Institute > 2017 > 354 > 5 > 2125-2156

This paper deals with the problem of fault-tolerant control (FTC) for nonlinear flexible spacecraft subject to actuator faults and input sampling. Different from the existing approaches, the considered nonlinear flexible spacecraft is approximated by Takagi–Sugeno (T–S) Fuzzy techniques with connecting a set of linear models. To tackle the loss effectiveness of actuator, a general model of actuator...

article

Asynchronous <alternatives>$\ell _1$<mml:math overflow="scroll"><mml:msub><mml:mi>ℓ</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math><inline-graphic xlink:href="IET-CTA.2016.0846.IM1.gif" /></alternatives> positive filter design for switched positive systems with overlapped detection delay

Yu Ren, Meng Joo Er, Guanghui Sun

IET Control Theory & Applications > 2017 > 11 > 3 > 319 - 328

In this study, the asynchronous <alternatives>$\ell _1$<mml:math overflow="scroll"><mml:msub><mml:mi>ℓ</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math><inline-graphic xlink:href="IET-CTA.2016.0846.IM2.gif" /></alternatives> positive filtering problem for a class of switched positive system with detection delay is...

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INFONA - science communication portal

Search results for: Guanghui Sun

Direct evidence for hydrated protons as the active species in artificial photocatalytic water reduction into hydrogen

Finite Frequency Vibration Suppression for Space Flexible Structures in Tip Position Control

Quasi‐Time‐Dependent $H_{\infty}$ Controller for Discrete‐Time Switched Linear Systems With Mode‐Dependent Average Dwell‐Time

Practical Tracking Control of Linear Motor With Adaptive Fractional Order Terminal Sliding Mode Control

Weighted‐average ℓ₁ filtering for switched positive systems

Switched systems with average dwell time: Computation of the robust positive invariant set

Finite-time robust fuzzy control for non-linear Markov jump systems under aperiodic sampling and actuator constraints

Fractional order sliding mode control for attitude and altitude stabilization of a quadrotor UAV

Simulations of friction models for linear motors

A robust level set method with Markov random fields term and fractional-order regularization term

Observer-based stabilization for switched positive system with mode-dependent average dwell time

Constraint admissible state sets for switched systems with average dwell time

Linear motor motion control using fractional order sliding mode controller with friction compensation

Dynamic adaptive saturated sliding mode control for deployment of tethered satellite system

Structural Dependence of Competitive Adsorption of Water and Methanol on TiO₂ Surfaces

Fractional order modeling and residual vibration suppression for flexible two-mass system

Finite-Time Fuzzy Sampled-Data Control for Nonlinear Flexible Spacecraft With Stochastic Actuator Failures

Fault‐Tolerant Finite Frequency H_∞ Control for Uncertain Mechanical System with Input Delay and Constraint

Fuzzy logic based fault-tolerant attitude control for nonlinear flexible spacecraft with sampled-data input

Asynchronous <alternatives>$\ell _1$<mml:math overflow="scroll"><mml:msub><mml:mi>ℓ</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math><inline-graphic xlink:href="IET-CTA.2016.0846.IM1.gif" /></alternatives> positive filter design for switched positive systems with overlapped detection delay

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