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Flatness-Based control in Successive Loops for Unmanned Aerial Vehicles and Micro-Satellites

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Guidance, Navigation and control 2023年第4期3卷 26-57页

作者： Gerasimos Rigatos Masoud Abbaszadeh Krishna Busawon Laurent Dala Unit of Industrial Automation Industrial Systems Institute 26504 Rion Patras Greece Department of ECSE Rensselaer Polytechnic Institute 12065New YorkUSA nonlinear control group University of Northumbria Newcastle NE18STUK Department of Mechanical Engineering university of northumbria newcastle ne18st UK

The control problem for the multivariable and nonlinear dynamics of unmanned aerial vehicles and micro-satellites is solved with the use of a flatness-based control approach which is implemented in successive *** state-space model of(i)unmanned aerial vehicles and(ii)micro-satellites is separated into two subsystems,which are connected between them in cascading *** one of these subsystems can be viewed independently as a differentially flat system and control about it can be performed with inversion of its dynamics as in the case of input–output linearized flat *** state variables of the second subsystem become virtual control inputs for the first *** turn,exogenous control inputs are applied to the first *** whole control method is implemented in two successive loops and its global stability properties are also proven through Lyapunov stability *** validity of the control method is confirmed in two case studies:(a)control and trajectories tracking for the autonomous octocopter,(ii)control of the attitude dynamics of micro-satellites.

关键词： Autonomous octocopter attitude dynamics of micro-satellites multivariable control differential flatness properties flatness-based control in successive loops global stability Lyapunov analysis

Combined Estimation of Vehicle Dynamic state and Inertial Parameter for Electric Vehicles Based on Dual Central Difference Kalman Filter Method

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 339-354页

作者： Xianjian Jin Junpeng Yang Liwei Xu Chongfeng Wei Zhaoran Wang Guodong Yin School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200072China state Key Laboratory of Automotive Simulation and control Jilin UniversityChangchun 130025China School of Mechanical Engineering Southeast UniversityNanjing 211189China Mechanical and Construction Engineering Northumbria UniversityNewcastle NE18STUK

Distributed drive electric vehicles(DDEVs)possess great advantages in the viewpoint of fuel consumption,environment protection and traffic *** the effects of inertial parameter variation in DDEV control system become much more pronounced due to the drastic reduction of vehicle weights and body size,and inertial parameter has seldom been tackled and systematically *** paper presents a dual central difference Kalman filter(DCDKF)where two Kalman filters run in parallel to simultaneously estimate vehicle different dynamic states and inertial parameters,such as vehicle sideslip angle,vehicle mass,vehicle yaw moment of inertia,the distance from the front axle to centre of *** proposed estimation method only integrates and utilizes real-time measurements of hub torque information and other in-vehicle sensors from standard *** four-wheel nonlinear vehicle dynamics estimation model considering payload variations,Pacejka tire model,wheel and motor dynamics model is developed,the observability of the DCDKF observer is analysed and derived via Lie derivative and differential geometry *** address system nonlinearities in vehicle dynamics estimation,the DCDKF and dual extended Kalman filter(DEKF)are also investigated and *** with various maneuvers are carried out to verify the effectiveness of the proposed method using Matlab/*** results show that the proposed DCDKF method can effectively estimate vehicle dynamic states and inertial parameters despite the existence of payload variations and variable driving *** research provides a boot-strapping procedure which can performs optimal estimation to estimate simultaneously vehicle system state and inertial parameter with high accuracy and real-time ability.

关键词： Distributed drive Electric vehicle state observation Inertial parameter Dual central difference Kalman filter

Multi-core-shell-structured LiFePO_(4)@Na_(3)V_(2)(PO_(4))_(3)@C composite for enhanced low-temperature performance of lithium-ion batteries

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Rare Metals 2021年第4期40卷 828-836页

作者： Xing-Xing Gu Shuang Qiao Xiao-Lei Ren Xing-Yan Liu You-Zhou He Xiao-Teng Liu Tie-Feng Liu Chongqing Key Laboratory of Catalysis and new Environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon Tyne NE18STUK GRINM group Co. Ltd.Beijing 100088China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China

In this work,a multi-core-shell-structured LiFePO_(4)@Na_(3) V_(2)(PO_(4))_(3)@C(LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO_(4) cathode for lithium-ion *** electron microscopy(TEM) confirms the inner NVP and outer carbon layers coexisted on the surface of LFP *** evaluated at low-temperature operation,LFP@NVP@C composite exhibits an evidently enhanced electrochemical performance in term of higher capacity and lower polarization,compared with LFP@*** at-10℃ with 0.5 C,LFP@NVP@C delivers a discharge capacity of ca.96.9 mAh-g^(-1) and discharge voltage of ca.3.3 V,which is attributed to the beneficial contribution of NVP *** ICON-structured NVP with an open framework for readily insertion/desertion of Li+ will effectively reduce the polarization for the electrochemical reactions of the designed LFP@NVP@C composite.

关键词： LiFePO_(4)@Na_(3)V_(2)(PO_(4))_(3)@C composite Multi-core-shell Low-temperature Lithium-ion batteries

Interface Engineering via Ti_(3)C_(2)T_(x) MXene Electrolyte Additive toward Dendrite-Free Zinc Deposition

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Nano-Micro Letters 2021年第6期13卷 95-107页

作者： Chuang Sun Cuiping Wu Xingxing Gu Chao Wang Qinghong Wang School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhouJiangsu 221116P.R.China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon Tyne NE18STUK Chongqing Key Laboratory of Catalysis and new Environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067P.R.China

Zinc metal batteries have been considered as a promising candidate for next-generation batteries due to their high safety and low ***,their practical applications are severely hampered by the poor cyclability that caused by the undesired dendrite growth of metallic ***,Ti_(3)C_(2)T_(x) MXene was first used as electrolyte additive to facilitate the uniform Zn deposition by controlling the nucleation and growth process of *** MXene additives can not only be absorbed on Zn foil to induce uniform initial Zn deposition via providing abundant zincophilic-O groups and subsequently participate in the formation of robust solid-electrolyte interface film,but also accelerate ion transportation by reducing the Zn^(2+) concentration gradient at the electrode/electrolyte ***,MXene-containing electrolyte realizes dendrite-free Zn plating/striping with high Coulombic efficiency(99.7%)and superior reversibility(stably up to 1180 cycles).When applied in full cell,the Zn-V_(2)O_(5)cell also delivers significantly improved cycling *** work provides a facile yet effective method for developing reversible zinc metal batteries.

关键词： Zinc metal batteries Ti_(3)C_(2)T_(x)MXene Electrolyte additive Uniform Zn deposition

Thin Film Photovoltaic/Thermal Solar Panels

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电工电能新技术 2008年第3期27卷 1-8页

作者： David JOHNstON Power and control Research group School of Computing Engineering and Ihformation Sciences University of Northumbria at Newcastle NE1 8ST UK

A solar panel is described,in which thin films of semiconductor are deposited onto a metal *** semiconductor-metal combination forms a thin film photovoltaic cell,and also acts as a reflector-absorber tandem,which acts as a solar selective surface,thus enhancing the solar thermal performance of the collector *** use of thin films reduces the distance heat is required to flow from the absorbing surface to the metal plate and heat exchange *** modelling demonstrated that,by suitable choice of materials,photovoltaic efficiency can be maintained,with thermal performance slightly reduced,compared to that for thermal-only *** grading the absorber layer-to reduce the band gap in the lower region-the thermal performance can be improved,approaching that for a thermal-only solar panel.

关键词：太阳能技术光电性能收集板半导体

Biosafety of a 3D-printed intraocular lens made of a poly (acrylamide-co-sodium acrylate) hydrogel in vitro and in vivo

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International Journal of Ophthalmology(English edition) 2020年第10期13卷 1521-1530页

作者： Jia-Wen Li Yi-Jian Li Xi-Su Hu Yu Gong Ben-Bin Xu Hai-Wei Xu Zheng-Qin Yin Southwest Hospital/Southwest Eye Hospital Third Military Medical University(Army Medical University)Chongqing 400038China Key Lab of Visual Damage and Regeneration&Restoration of Chongqing Chongqing 400038China Smart Materials and Surfaces Lab Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon Tyne NE18STUK

AIM:To assess the biosafety of a poly(acrylamide-cosodium acrylate)hydrogel(PAH)as a 3D-printed intraocular lens(IOL)***:The biosafety of PAH was first evaluated in vitro using human lens epithelial cells(LECs)and the ARPE19 cell line,and a cell counting kit-8(CCK-8)assay was performed to investigate alterations in cell proliferation.A thin film of PAH and a conventional IOL were intraocularly implanted into the eyes of new Zealand white rabbits respectively,and a sham surgery served as control *** anterior segment photographs,intraocular pressure(IOP),blood parameters and electroretinograms(ERG)were *** cytokines in the aqueous humor,such as TNFαand IL-8,were examined by *** apoptosis of the retina was investigated by TUneL assay,and macro PAHge activation was detected by ***:PAH did not slow cell proliferation when cocultured with human LECs or ARPE19 *** implantation of a thin film of a 3 D-printed IOL composed of PAH did not affect the IOP,blood parameters,ERG or optical structure in any of the three experimental groups(n=3 for each).Both TNFαand IL-8 in the aqueous humor of PAH group were transiently elevated 1 wk post-operation and recovered to normal levels at 1 and 3 mo ***1+macroPAHges in the anterior chamber angle in PAH group were increased markedly compared to those of the control group;however,there was no significant difference compared to those in the IOL ***:PAH is a safe material for 3D printing of personal IOLs that hold great potential for future clinical applications.

关键词： cataract biosafety lens epithelial cells ARPE19 cells intraocular lens 3D printing poly hydrogel rabbit

nonlinear Model Predictive controller for Compensations of Single Line-to-ground Fault in Resonant Grounded Power Distribution networks

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1113-1125页

作者： Warnakulasuriya Sonal Prashenajith Fernando Mostafa Barzegar-Kalashani Md Apel Mahmud Shama Naz Islam Nasser Hossenzadeh Faculty of Engineering and Environment Northumbria UniversityNewcastleUK School of Software and Electrical Engineering Swinburne University of TechnologyHawthornAustralia School of Engineering Deakin UniversityWaurn PondsAustralia

An nonlinear model predictive controller(NMPC)is proposed in this paper for compensations of single line-to-ground(SLG)faults in resonant grounded power distribution networks(RGPDNs),which reduces the likelihood of power line bushfire due to electric *** current compensation(RCC)inverters with arc suppression coils(ASCs)in RGPDNs are controlled using the proposed NMPC to provide appropriate compensations during SLG *** proposed NMPC is incorporated with the estimation of ASC inductance,where the estimation is carried out based on voltage and current measurements from the neutral point of the power distribution *** compensation scheme is developed in the discrete time using the equivalent circuit of *** proposed NMPC for RCC inverters ensures that the desired current is injected into the neutral point during SLG faults,which is verified through both simulations and control hardware-in-the-loop(CHIL)*** results are also presented against an integral sliding mode controller(ISMC)by demon-strating the capability of power line bushfire mitigation.

关键词： Fault current phase voltage nonlinear model predictive controller(NMPC) parameter adaptation parametric uncertainty power line bushfire

Brushless Doubly-Fed Machines:Opportunities and Challenges

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Chinese Journal of Electrical Engineering 2018年第2期4卷 1-17页

作者： Peng Han Ming Cheng Sul Ademi Milutin G.Jovanovic School of Electrical Engineering Southeast UniversityNanjing 210096China Warwick Manufacturing group University of WarwickCoventryUK Faculty of Engineering and Environment Northumbria UniversityNewcastle upon TyneUK

The brushless doubly-fed machine(BDFM)is a family of multiport electric machines with two ac electrical ports and a common mechanical *** from the conventional singly-fed machines whose synchronous speed is solely determined by a single supply frequency and the actual pole pair number,the BDFM has two supply frequencies and two different pole pair numbers to control the rotor *** the two accessible electrical ports,all BDFMs are endowed with more degrees of freedom for speed and power control,inherent fault-tolerant capability and high *** BDFM in its broad sense has been extensively investigated as a promising alternative to the conventional slip-ring doubly-fed induction machine(DFIM)during the past decades,for both limited and wide speed range *** paper presents a new theoretical framework of the BDFM within which all topological variants can be closely linked by the similarities in working *** individualities of each machine topology are presented first,followed by the commonalities such as the modeling techniques,modes of operation,design considerations and control *** challenges are identified and highlighted based on recent developments and possible opportunities are predicted considering the unique nature of this special AC machine type.

关键词： Brushless doubly-fed machine multiport electric machine modeling techniques modes of operation design considerations control strategies

Aromas of <i>Salvia</i>Species Enhance Everyday Prospective Memory Performance in Healthy Young Adults

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Advances in Chemical Engineering and Science 2014年第3期4卷 339-346页

作者： Mark Moss Michelle Rouse Lucy Moss Brain Performance and Nutrition Research Centre Department of Psychology Northumbria University Newcastle upon Tyne UK

Research has previously demonstrated that aromas of both Salvia officinalis and Salvia lavandulaefolia are capable of modulating aspects of retrospective memory, attention and mood. This study is the first to report the potential for these aromas to enhance everyday prospective memory performance in healthy young adults. In an independent groups design, three conditions, Salvia officinalis aroma, Saliva lavandulaefolia aroma and no aroma were employed with 45 healthy volunteers in each condition. Prospective memory performance was assessed using the Prospective Remembering Video Procedure. Data analysis revealed that the Salvia officinalis aroma group performed significantly better than the control group on both event and action subscales of the prospective memory task. Saliva lavandulaefolia aroma only led to enhancement for the event measure when compared to controls. No differences were found between the aroma conditions. These findings offer support for those previously reported for the effects of the aromas of Salvia sp. on cognition and again demonstrate differential effects of the two aromas. The results are considered in terms of pharmacological mechanisms.

关键词： Salvia Sage Aroma Everyday Memory