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Simplifying ADRC design with error-based framework: case study of a DC-DC buck power converter

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Control Theory and Technology 2021年第1期19卷 94-112页

作者： rafal madonski Krzysztof Lakomy Jun Yang Energy Electricity Research Center International Energy CollegeJinan UniversityGuangzhouZhuhai CampusChina PoznańUniversity of Technology PoznanPoland Key Laboratory of Measurement and Control of CSE Ministry of EducationSchool of AutomationSoutheast UniversityNanjingChina

In this work,the problem of designing a robust control algor ithm for a DC-DC buck power converter is *** applied solution is based on a recenly proposed eror-based version of the active disturbance rejection control(ADRC)scheme,in which the unknown higher-order lerms of the reference signal are treated as additional components of the system"total disturbance".The motivation here is to provide a prac tical following of a reference voltage trajectory for the buck converler in specific cases where neither the analytical form of the desired signal nor its future values are known a priori,hence cannot be directly used for control *** this *** application of the error-based ADRC results in a prac-tically appealing control technique,with compact struc *** control rule,and intwitive tuning(inherited from the conventional output-based ADRC scheme).***,and experimental results are shown to validate the efficacy of the error-based ADRC in buck converter control,followed by a discussion about the revealed theoretical and practical limitations of this approach.

关键词： DC-DC converter Power electronics Active disturbance rejection control ADRC Extended stale observer ESO Error-based form

ADRC in output and error form:connection,equivalence,performance

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Control Theory and Technology 2023年第1期21卷 56-71页

作者： rafal madonski Gernot Herbst Momir Stankovic Energy and Electricity Research Center Jinan UniversityZhuhaiChina University of Applied Sciences ZwickauGermany University of Defence BelgradeSerbia

In this work,we investigate two specific linear ADRC structures,namely output-and *** former is considered a“standard”version of ADRC,a title obtained primarily thanks to its simplicity and effectiveness,which have spurred its adoption across multiple *** latter is found to be especially appealing to practitioners as its feedback error-driven structure bares similarities to conventional control solutions,like PI and *** this paper,we describe newly found connections between the two considered ADRC structures,which allowed us to formally establish conditions for their ***,the conducted comprehensive performance comparison between output-and error-based ADRCs has facilitated the identification of specific modules within them,which can now be conveniently used as building blocks,thus aiding the control designers in customizing ADRC-based solutions and making them most suitable for their applications.

关键词： Active disturbance rejection control(ADRC)-Output-based form Error-based form Equivalence condition:Comparative analysis

On a novel tracking differentiator design based on iterative learning in a moving window

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Control Theory and Technology 2023年第1期21卷 46-55页

作者： Xiangyang Li rafal madonski Zhiqiang Gao Senping Tian Key Laboratory of Autonomous Systems and Network Control Ministry of EducationSchool of Automation Science and EngineeringSouth China University of TechnologyGuangzhou 510641China Energy and Electricity Research Center Jinan UniversityZhuhai 519070China Department of Electrical and Computer Science Cleveland State UniversityClevelandOH 44115USA

Differential signals are key in control engineering as they anticipate future behavior of process variables and therefore are critical in formulating control laws such as proportional-integral-derivative(PID).The practical challenge,however,is to extract such signals from noisy measurements and this difficulty is addressed first by *** in the form of linear and nonlinear tracking differentiator(TD).While improvements were made,TD did not completely resolve the conflict between the noise sensitivity and the accuracy and timeliness of the *** two approaches proposed in this paper start with the basic linear TD,but apply iterative learning mechanism to the historical data in a moving window(MW),to form two new iterative learning tracking differentiators(IL-TD):one is a parallel IL-TD using an iterative ladder network structure which is implementable in analog circuits;the other a serial IL-TD which is implementable digitally on any computer *** algorithms are validated in simulations which show that the proposed two IL-TDs have better tracking differentiation and de-noise performance compared to the existing linear TD.

关键词： Tracking differentiator(TD) Iterative learning Iterative learning tracking differentiator(IL-TD) Active disturbance rejection control(ADRC)-Two-dimensional system(2-D system)

Uncertainty and disturbance estimator-based model predictive control for wet flue gas desulphurization system

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Chinese Journal of Chemical Engineering 2024年第3期67卷 182-194页

作者： Shan Liu Wenqi Zhong Li Sun Xi Chen rafal madonski School of Energy and Environment Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSoutheast UniversityNanjing 210096China Faculty of Automatic Control Electronics and Computer ScienceSilesian University of TechnologyGliwise 44-100Poland

Wet flue gas desulphurization technology is widely used in the industrial process for its capability of efficient pollution *** desulphurization control system,however,is subjected to complex reaction mechanisms and severe disturbances,which make for it difficult to achieve certain practically relevant control goals including emission and economic performances as well as system *** address these challenges,a new robust control scheme based on uncertainty and disturbance estimator(UDE)and model predictive control(MPC)is proposed in this *** UDE is used to estimate and dynamically compensate acting disturbances,whereas MPC is deployed for optimal feedback regulation of the resultant *** viewing the system nonlinearities and unknown dynamics as disturbances,the proposed control framework allows to locally treat the considered nonlinear plant as a linear *** obtained simulation results confirm that the utilization of UDE makes the tracking error negligibly small,even in the presence of unmodeled *** the conducted comparison study,the introduced control scheme outperforms both the standard MPC and PID(proportional-integral-derivative)control strategies in terms of transient performance and ***,the results reveal that a lowpass-filter time constant has a significant effect on the robustness and the convergence range of the tracking error.

关键词： Desulphurization system Disturbance rejection Model predictive control Uncertainty and disturbance estimator Nonlinear system

Invasion of the raccoon dog Nyctereutes procyonoides in Europe： History of colonization, features behind its success, and threats to native fauna

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Current Zoology 2011年第5期57卷 584-598页

作者： Kaarina KAUHALA rafal KOWALCZYK Finnish Game and Fisheries Research Institute Itaiinen Pitkakatu 3 A FI-20520 Turku Finland Mammal Research Institute Polish Academy of Sciences 17-230 Bialowieza Poland

We aimed to review the history of the introduction and colonization of the raccoon dog Nyctereutes procyonoides in Europe, the features behind its successful expansion and its impact on native fauna. The raccoon dog quickly colonized new areas after being introduced to the European part of the former Soviet Union. Today it is widespread in Northern and Eastern Europe and is still spreading in Central Europe. Features behind its success include its adaptability, high reproductive potential, omnivory, hibernation in northem areas, multiple introductions with 〉 9000 individuals from different localities, and tendency to wander enabling gene flow between populations. Firm evidence of the raccoon dog＇s negative impact on native fauna, such as a reduction in bird populations, is still scarce. Raccoon dogs may destroy waterfowl nests, although a nest predation study in Latvia did not confirm this. Predator removal studies in Finland suggested that the raccoon dog＇s impact on game birds is smaller than expected. However, raccoon dogs may have caused local extinction of frog populations, especially on islands. Raccoon dogs may compete with other carnivores for food, for example for carrion in winter, or for the best habitat patches. In northern Europe potential competitors include the red fox Vulpes vulpes and the badger Meles meles, but studies of their diets or habitat preferences do not indicate severe competition. The raccoon dog is an important vector of diseases and parasites, such as rabies, Echinococcus mul-tilocularis and Trichinella spp. and this is no doubt the most severe consequence arising from the spread of this alien species in Europe [Current Zoology 57 （5）： 584-598, 2011].

关键词： Nyctereutes procyonoides Competition Introduction Predation Vector of diseases and parasites

Borrowing titania's photoinduced electrons for molecular switching

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Science China Chemistry 2016年第4期59卷 420-421页

作者： rafal Klajn Department of Organic Chemistry Weizmann Institute of Science

When exposed to light, titanium dioxide （titania, TiO2） can act as a powerful catalyst for degrading a variety of organic compounds. Anatase--one of the polymorphs of TiO2--has a band gap of 3.2 eV; exposing it to ultraviolet light causes the formation of electron-hole pairs, which, in the presence of water, can generate hydroxyl radicals--strong oxidizing agents. The photocatalytic behavior of titania has enabled the removal of various chemicals and microbiological im- purities from both drinking water and industrial waste wa- ter.

关键词：电子-空穴对二氧化钛分子开关工业废水处理借贷光致有机化合物羟基自由基

Impact of gastroesophageal reflux disease on the quality of life of Polish patients

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World Journal of Clinical Cases 2019年第12期7卷 1421-1429页

作者： rafal Gorczyca Piotr Pardak Anna Pekala rafal Filip Department of Clinical Endoscopy Institute of Rural Health Lublin 20-080 Poland Department of Gastroenterology with IBD Unit of Clinical Hospital 2 University of Rzeszów Rzeszów 35-301 Poland

BACKGROUND Gastro-esophageal reflux disease (GERD) is a serious health and social problem leading to a considerable decrease in the quality of life of patients. Among the risk factors associated with reflux symptoms and that decrease the quality of life are stress, overweight and an increase in body weight. The concept of healthrelated quality of life (HRQL) covers an expanded effect of the disease on a patient’s wellbeing and daily activities and is one of the measures of widely understood quality of life. HRQL is commonly measured using a selfadministered, disease-specific questionnaires. AIM To determine the effect of reflux symptoms, stress and body mass index (BMI) on the quality of life. METHODS The study included 118 patients diagnosed with reflux disease who reported to an outpatient department of gastroenterology or a specialist hospital ward for planned diagnostic tests. Assessment of the level of reflux was based on the frequency of 5 typical of GERD symptoms. HRQL was measured by a 36-item Short Form Health Survey (SF-36) and level of stress using the 10-item Perceived Stress Scale. Multi-variable relationships were analyzed using multiple regression. RESULTS Eleven models of analysis were performed in which the scale of the SF-36 was included as an explained variable. In all models, the same set of explanatory variables: Gender, age, reflux symptoms, stress and BMI, were included. The frequency of GERD symptoms resulted in a decrease in patients’ results according to 6 out of 8 SF-36 scales- except for mental health and vitality scales. Stress resulted in a decrease in patient function in all domains measured using the SF-36. Age resulted in a decrease in physical function and in overall assessment of self-reported state of health. An increasing BMI exerted a negative effect on physical fitness and limitations in functioning resulting from this decrease. CONCLUSION In GERD patients, HRQL is negatively determined by the frequency of reflux symptoms and b

关键词： Gastroesophageal reflux disease Stress Psychological factors Health-related quality of life Obesity

Deciphering the effects of disperser assemblages and seed mass on patterns of seed dispersal in a rodent community

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Integrative Zoology 2017年第6期12卷 457-467页

作者： Aleksandra WRÓBEL rafal ZWOLAK Department of Systematic Zoology Institute of Environmental BiologyAdam Mickiewicz UniversityPoland

The sizes of both seed dispersers and seeds are traits that are likely to interact to influence seed fate in many synzoochoric plant ***,we examined whether members of a granivorous rodent community consisting of species of different body size vary in their effectiveness as seed dispersers,and how this relationship may be altered by seed *** marked northern red oak(Quercus rubra)acorns with plastic tags and placed them in size-selective rodent *** exclosures allowed differential access of rodent groups based on different body size:(i)small(*** spp.);(ii)small and medium(*** striatus);and(iii)small,medium and large(*** carolinensis)species of *** removal did not differ among exclosure types,but more seeds were missing when removed by small rodents,probably because of *** treatments did not influence the relative frequency of acorn ***,small rodents cached considerably fewer and partially ate more acorns than the other 2 *** mean dispersal distance was the longest for cages with medium openings,intermediate for cages with large openings and the shortest for cages with small *** mass positively affected the probability of caching and this relationship was unaffected by exclosure *** conclusion,granivorous rodents of different body sizes strongly differed in their interactions with acorns,with small rodents acting primarily as acorn predators and medium and large species contributing significantly more to dispersal of red oaks.

关键词： acorn dispersal initial seed fate plant-animal interactions rodent community scatterhoarding

Flu channel drug resistance:a tale of two sites

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Protein & Cell 2010年第3期1卷 246-258页

作者： rafal M.Pielak James J.Chou Department of Biological Chemistry and Molecular Pharmacology Harvard Medical SchoolBostonMA 02115USA Program in Biological and Biomedical Sciences Harvard Medical SchoolBostonMA 02115USA

The M2 proteins of influenza A and B virus,AM2 and BM2,respectively,are transmembrane proteins that oligomerize in the viral membrane to form proton-selective *** conductance of the M2 proteins is required for viral replication;it is believed to equilibrate pH across the viral membrane during cell entry and across the trans-Golgi membrane of infected cells during viral *** addition to the role of M2 in proton conductance,recent mutagenesis and structural studies suggest that the cytoplasmic domains of the M2 proteins also play a role in recruiting the matrix proteins to the cell surface during virus *** viral ion channels of minimalist architecture,the membrane-embedded channel domain of M2 has been a model system for investigating the mechanism of proton ***,as a proven drug target for the treatment of influenza A infection,M2 has been the subject of intense research for developing new anti-flu ***2 is the target of two anti-influenza A drugs,amantadine and rimantadine,both belonging to the adamantane class of ***,resistance of influenza A to adamantane is now widespread due to mutations in the channel domain of *** review summarizes the structure and function of both AM2 and BM2 channels,the mechanism of drug inhibition and drug resistance of AM2,as well as the development of new M2 inhibitors as potential anti-flu drugs.

关键词： M2 BM2 influenza proton channel amantadine rimantadine