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Tracking control of robot manipulators via output feedback linearization

FEI Yue-nong, Wu Qing-hua

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3,   Pages 329-335 doi: 10.1007/s11465-006-0034-y

Abstract: A sliding mode perturbation observer (SPO) is designed to estimate unmeasurable states and system perturbations

Keywords： available     comparison     unmeasurable     nonlinear     perturbation observer    

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Irreversible phenotypic perturbation and functional impairment of B cells during HIV-1 infection

Jingjing Yan, Shuye Zhang, Jun Sun, Jianqing Xu, Xiaoyan Zhang

Frontiers of Medicine 2019, Volume 13, Issue 3,   Pages 409-409 doi: 10.1007/s11684-018-0618-z

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Optimal one-bit perturbation in Boolean networks based on cascading aggregation Research Articles

Jin-feng PAN, Min MENG

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 2,   Pages 294-303 doi: 10.1631/FITEE.1900411

Abstract: We investigate the problem of finding optimal one-bit perturbation that maximizes the size of the basinnecessary and sufficient condition is given to ensure the invariance of desired attractors after one-bit perturbationSecond, an algorithm is proposed to identify whether the one-bit perturbation will cause the emergenceNext, the change of the size of BOAs after one-bit perturbation is provided in an algorithm.

Keywords： Large-scale Boolean network     Attractor     Cascading aggregation     One-bit perturbation    

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Assessment of a fuzzy logic based MRAS observer used in a photovoltaic array supplied AC drive

Bhavnesh KUMAR, Yogesh K CHAUHAN, Vivek SHRIVASTAVA

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 81-89 doi: 10.1007/s11708-014-0295-9

Abstract: In this paper a fuzzy logic (FL) based model reference adaptive system (MRAS) speed observer for high

Keywords： induction motor drive     fuzzy logic (FL) control     model reference adaptive system (MRAS)     photovoltaic (PV) array     vector control    

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Observer-based control for fractional-order singular systems with order Research Article

Bingxin LI, Xiangfei ZHAO, Xuefeng ZHANG, Xin ZHAO

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 12,   Pages 1862-1870 doi: 10.1631/FITEE.2200294

Abstract: In this paper, for fractional-order with order (0<<1) and is studied. On the basis of the Smith predictor and approximation error, the system with is approximately equivalent to the system without . Furthermore, based on the (LMI) technique, the necessary and sufficient condition of is proposed. Since the condition is a nonstrict LMI, including the equality constraint, it will lead to some trouble when solving problems using toolbox. Thus, the strict LMI-based condition is improved in the paper. Finally, a numerical example and a direct current motor example are given to illustrate the effectiveness of the strict LMI-based condition.

Keywords： Observer-based control     Singular systems     Fractional order     Input delay     Linear matrix inequality    

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Antibiotics-mediated intestinal microbiome perturbation aggravates tacrolimus-induced glucose disorders

Yuqiu Han, Xiangyang Jiang, Qi Ling, Li Wu, Pin Wu, Ruiqi Tang, Xiaowei Xu, Meifang Yang, Lijiang Zhang, Weiwei Zhu, Baohong Wang, Lanjuan Li

Frontiers of Medicine 2019, Volume 13, Issue 4,   Pages 471-481 doi: 10.1007/s11684-019-0686-8

Abstract: Both immunosuppressants and antibiotics (ABX) are indispensable for transplant patients. However, the former increases the risk of new-onset diabetes, whereas the latter impacts intestinal microbiota (IM). It is still unclear whether and how the interaction between immunosuppressants and ABX alters the IM and thus leads to glucose metabolism disorders. This study examined the alterations of glucose and lipid metabolism and IM in mice exposed to tacrolimus (TAC) with or without ABX. We found that ABX further aggravated TAC-induced glucose tolerance and increased insulin secretion. Combined treatment resulted in exacerbated lipid accumulation in the liver. TAC-altered microbial community was further amplified by ABX administration, as characterized by reductions in phylum Firmicutes, family Lachnospiraceae, and genus . Analyses based on the metagenomic profiles revealed that ABX augmented the effect of TAC on microbial metabolic function mostly related to lipid metabolism. The altered components of gut microbiome and predicted microbial functional profiles showed significant correlation with hepatic lipid accumulation and glucose disorders. In conclusion, ABX aggravated the effect of TAC on the microbiome and its metabolic capacities, which might contribute to hepatic lipid accumulation and glucose disorders. These findings suggest that the ABX-altered microbiome can amplify the diabetogenic effect of TAC and could be a novel therapeutic target for patients.

Keywords： antibiotics     tacrolimus     glucose disorders     microbiome    

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Observer design for induction motor: an approach based on the mean value theorem

Mohamed Yacine HAMMOUDI,Abdelkarim ALLAG,Mohamed BECHERIF,Mohamed BENBOUZID,Hamza ALLOUI

Frontiers in Energy 2014, Volume 8, Issue 4,   Pages 426-433 doi: 10.1007/s11708-014-0314-x

Abstract: In this paper, observer design for an induction motor has been investigated.The peculiarity of this paper is the synthesis of a mono-Luenberger observer for highly coupled systemThe proposed observer guarantees the global exponential convergence to zero of the estimation error.Finally, the simulation results are given to show the performance of the observer design.

Keywords： observer design     differential mean value theorem (DMVT)     sector nonlinearity transformation     linear matrix    

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Polynomial robust observer implementation based passive synchronization of nonlinear fractional-order

Alain Soup Tewa Kammogne, Michaux Noubé Kountchou, Romanic Kengne, Ahmad Taher Azar, Hilaire Bertrand Fotsin, Soup Teoua Michael Ouagni,kouaneteoua@yahoo.fr,aazar@psu.edu.sa,ahmad.azar@fci.bu.edu.eg

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 9,   Pages 1267-1412 doi: 10.1631/FITEE.1900430

Abstract: A robust polynomial observer is designed based on passive synchronization of a given class of r ColpittsThe primary objective of the proposed observer is to minimize the effects of unknown bounded disturbancesmore practicable output-feedback passive controller is proposed using an adaptive polynomial state observerdistributed approach of a continuous frequency of the FOC is considered to analyze the stability of the observer
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On the MHD squeeze flow between two parallel disks with suction or injection via HAM and HPM

D. D. GANJI,M. ABBASI,J. RAHIMI,M. GHOLAMI,I. RAHIMIPETROUDI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 270-280 doi: 10.1007/s11465-014-0303-0

Abstract: The analytical methods called Homotopy Analysis Method (HAM) and Homotopy Perturbation Method (HPM) have

Keywords： Homotopy Analysis Method     Homotopy Perturbation Method     incompressible flow     magneto-hydrodynamic flow     parallel    

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A Survey of the Observability for Single Observer Passive Location

Deng Xinpu

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 54-62

Abstract:

A basic requirement for passive state estimation using single observer

Keywords： passive location     TMA     observability    

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Multiscale stochastic finite element method on random field modeling of geotechnical problems – a fast computing procedure

Xi F. XU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 107-113 doi: 10.1007/s11709-014-0268-4

Abstract: The Green-function-based multiscale stochastic finite element method (MSFEM) has been formulated based on the stochastic variational principle. In this study a fast computing procedure based on the MSFEM is developed to solve random field geotechnical problems with a typical coefficient of variance less than 1. A unique fast computing advantage of the procedure enables computation performed only on those locations of interest, therefore saving a lot of computation. The numerical example on soil settlement shows that the procedure achieves significant computing efficiency compared with Monte Carlo method.

Keywords： multiscale     finite element     settlement     perturbation     random field     geotechnical    

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Dynamic Target Tracking of Unmanned Aerial Vehicles Under Unpredictable Disturbances

Yanjie Chen,Yangning Wu,Limin Lan,Hang Zhong,Zhiqiang Miao,Hui Zhang,Yaonan Wang,

Engineering doi: 10.1016/j.eng.2023.05.017

Abstract: This study proposes an image-based visual servoing (IBVS) method based on a velocity observer for anThe relative velocities of the UAV and the dynamic target are estimated using the proposed velocity observerThanks to the velocity observer, translational velocity measurements are not required, and the controlThe stability of the velocity observer and IBVS controller is analyzed using the Lyapunov method.

Keywords： Unmanned aerial vehicle     Visual servoing     Velocity observer     Target tracking    

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Disturbance rejection via iterative learning controlwith a disturbance observer for active magnetic bearing None

Ze-zhi TANG, Yuan-jin YU, Zhen-hong LI, Zheng-tao DING

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 131-140 doi: 10.1631/FITEE.1800558

Abstract: A disturbance observer based ILC scheme is proposed that consists of a universal extended state observer

Keywords： Active magnetic bearings (AMBs)     Iterative learning control (ILC)     Disturbance observer    

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Intelligent fractional-order integral sliding mode control for PMSM based on an improved cascade observer Research Articles

Lingfei XIAO, Leiming MA, Xinhao HUANG,lfxiao@nuaa.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 2,   Pages 328-338 doi: 10.1631/FITEE.2000317

Abstract: In this paper, an intelligent control (FOISMC) strategy based on an improved cascade is proposed. First, an FOISMC strategy is designed to control a . It has good tracking performance, is strongly robust, and can effectively reduce chattering. The proposed FOISMC strategy associates strong points of the integral action (which can eliminate steady-state tracking errors) and the fractional calculus (which is flexible). Second, an improved cascade is proposed to detect the rotor information with a smaller observation error. The proposed combines an adaptive sliding mode and an extended high-gain . In addition, an improved variable-speed grey wolf is designed to enhance controller parameters. The effectiveness of the strategy is tested using simulations and an experiment involving model uncertainty and external disturbance.

Keywords： synchronous motor     Fractional-order integral sliding mode     Optimization algorithm     Sensorless control     Observer    

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High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 487-503 doi: 10.1007/s11465-021-0635-5

Abstract: This study presents an improved compound control algorithm that substantially enhances the anti-disturbance performance of a gear-drive gyro-stabilized platform with a floating gear tension device. The tension device can provide a self-adjustable preload to eliminate the gap in the meshing process. However, the weaker gear support stiffness and more complex meshing friction are also induced by the tension device, which deteriorates the control accuracy and the ability to keep the aim point of the optical sensors isolated from the platform motion. The modeling and compensation of the induced complex nonlinearities are technically challenging, especially when base motion exists. The aim of this research is to cope with the unmeasured disturbances as well as the uncertainties caused by the base lateral motion. First, the structural properties of the gear transmission and the friction-generating mechanism are analyzed, which classify the disturbances into two categories: Time-invariant and time-varying parts. Then, a proportional-integral controller is designed to eliminate the steady-state error caused by the time-invariant disturbance. A proportional multiple-integral-based state augmented Kalman filter is proposed to estimate and compensate for the time-varying disturbance that can be approximated as a polynomial function. The effectiveness of the proposed compound algorithm is demonstrated by comparative experiments on a gear-drive pointing system with a floating gear tension device, which shows a maximum 76% improvement in stabilization precision.

Keywords： floating gear tension device     nonlinear friction     disturbance compensation     proportional multiple-integral observer    

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Title Author Date Type Operation

Tracking control of robot manipulators via output feedback linearization

FEI Yue-nong, Wu Qing-hua

Journal Article

Irreversible phenotypic perturbation and functional impairment of B cells during HIV-1 infection

Jingjing Yan, Shuye Zhang, Jun Sun, Jianqing Xu, Xiaoyan Zhang

Journal Article

Optimal one-bit perturbation in Boolean networks based on cascading aggregation

Jin-feng PAN, Min MENG

Journal Article

Assessment of a fuzzy logic based MRAS observer used in a photovoltaic array supplied AC drive

Bhavnesh KUMAR, Yogesh K CHAUHAN, Vivek SHRIVASTAVA

Journal Article

Observer-based control for fractional-order singular systems with order

Bingxin LI, Xiangfei ZHAO, Xuefeng ZHANG, Xin ZHAO

Journal Article

Antibiotics-mediated intestinal microbiome perturbation aggravates tacrolimus-induced glucose disorders

Yuqiu Han, Xiangyang Jiang, Qi Ling, Li Wu, Pin Wu, Ruiqi Tang, Xiaowei Xu, Meifang Yang, Lijiang Zhang, Weiwei Zhu, Baohong Wang, Lanjuan Li

Journal Article

Observer design for induction motor: an approach based on the mean value theorem

Mohamed Yacine HAMMOUDI,Abdelkarim ALLAG,Mohamed BECHERIF,Mohamed BENBOUZID,Hamza ALLOUI

Journal Article

Polynomial robust observer implementation based passive synchronization of nonlinear fractional-order

Alain Soup Tewa Kammogne, Michaux Noubé Kountchou, Romanic Kengne, Ahmad Taher Azar, Hilaire Bertrand Fotsin, Soup Teoua Michael Ouagni,kouaneteoua@yahoo.fr,aazar@psu.edu.sa,ahmad.azar@fci.bu.edu.eg

Journal Article

On the MHD squeeze flow between two parallel disks with suction or injection via HAM and HPM

D. D. GANJI,M. ABBASI,J. RAHIMI,M. GHOLAMI,I. RAHIMIPETROUDI

Journal Article

A Survey of the Observability for Single Observer Passive Location

Deng Xinpu

Journal Article

Multiscale stochastic finite element method on random field modeling of geotechnical problems – a fast computing procedure

Xi F. XU

Journal Article

Dynamic Target Tracking of Unmanned Aerial Vehicles Under Unpredictable Disturbances

Yanjie Chen,Yangning Wu,Limin Lan,Hang Zhong,Zhiqiang Miao,Hui Zhang,Yaonan Wang,

Journal Article

Disturbance rejection via iterative learning controlwith a disturbance observer for active magnetic bearing

Ze-zhi TANG, Yuan-jin YU, Zhen-hong LI, Zheng-tao DING

Journal Article

Intelligent fractional-order integral sliding mode control for PMSM based on an improved cascade observer

Lingfei XIAO, Leiming MA, Xinhao HUANG,lfxiao@nuaa.edu.cn

Journal Article

High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device

Journal Article