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Статті в журналах з теми "Dual adaptive brake system"
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Wang, Xiangyu, Xiuheng Wu, Shuo Cheng, Jialei Shi, Xianyao Ping, and Wei Yue. "Design and Experiment of Control Architecture and Adaptive Dual-Loop Controller for Brake-by-Wire System With an Electric Booster." IEEE Transactions on Transportation Electrification 6, no. 3 (September 2020): 1236–52. http://dx.doi.org/10.1109/tte.2020.3010279.
Повний текст джерела
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M, Yuvaperiyasamy, and Hariganesh V. "Thermal Analysis of Dual Brake System." IOSR Journal of Mechanical and Civil Engineering 11, no. 1 (2014): 46–52. http://dx.doi.org/10.9790/1684-11154652.
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Farshizadeh, Emad, David Steinmann, Hermann Briese, and Hermann Henrichfreise. "A concept for an electrohydraulic brake system with adaptive brake pedal feedback." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 229, no. 6 (March 16, 2015): 708–18. http://dx.doi.org/10.1177/0954407015574172.
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Cho, Sukhwan, Rebecca Anne Bandy, John Ferris, Joerg Schlinkheider, and Marc Wimmershoff. "Location-Aware Adaptive Vehicle Dynamics System: Brake Modulation." SAE International Journal of Passenger Cars - Mechanical Systems 7, no. 2 (April 1, 2014): 482–87. http://dx.doi.org/10.4271/2014-01-0079.
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Hirotomi, Tetsuya. "User-Adaptive Brake Assist System for Rolling Walkers." Journal of Robotics and Mechatronics 33, no. 4 (August 20, 2021): 911–18. http://dx.doi.org/10.20965/jrm.2021.p0911.
Повний текст джерелаАнотація:
Rolling walkers are popular mobility aids for older adults. A rolling walker usually has two swivel front wheels and two non-swivel rear wheels. It is designed to improve stability while walking and reduce the risk of falling. However, a considerable number of users have come close to or experienced falling. We developed a user-adaptive brake assist system for the walker. In the system, the usage of a walker is modeled in combination with the walking speed and the distance from the walker to the user. A brake pattern is generated based on usage data interpolated using the inverse distance weighting method. The pattern is referenced to activate brakes with the corresponding strength while walking. The applicability was confirmed by analyzing the walking data of two older adults, and the usability was positively evaluated in experiments with seven young adults wearing elderly simulation suits.
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Zheng, Zhu An, Chuan Xue Song, Hui Lin, and Si Lun Peng. "Research of the Brake Pedal Feel on Wire-by-Brake-System." Advanced Materials Research 655-657 (January 2013): 1131–35. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1131.
Повний текст джерелаАнотація:
Analysis and comparison with conventional brake systems and brake-by-wire-system with pedal stroke simulator, and the establishment of the pedal stroke simulator model with the AMESim software, joint Matlab/Simulink software to design single neuron adaptive intelligent PID control strategy of the pedal stroke simulator. Through simulation verification draw that this brake-by-wire-systems and the control strategy can achieve the requirements of brake pedal feel of conventional brake systems, and effectively improve comfort during braking.
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Bogomolov, Viktor, Valeriy Klimenko, Dmytro Leontiev, Oleksandr Kuripka, Andrii Frolov, and Yevhen Don. "FEATURES OF ADAPTIVE BRAKE CONTROL OF THE SECONDARY BRAKE SYSTEM OF A MULTI-AXLE VEHICLE." Automobile transport, no. 48 (May 29, 2021): 27–37. http://dx.doi.org/10.30977/at.2219-8342.2021.48.0.27.
Повний текст джерелаАнотація:
Problem. A malfunction of the service braking system of a wheeled vehicle (CTS) significantly affects road safety, especially when operating multi-axle vehicles with large masses. One of the ways to increase the level of road safety of multi-axle vehicles, when braking them using a spare (emergency) braking system, is the introduction of automated adaptive braking systems into the design of the brake drive of vehicles. The definition of the limits of the use of the adaptive braking system on vehicles with many axles is almost not disclosed in the scientific and technical literature, therefore, the issue of using such a system on vehicles with a large number of axles requires additional research. Purpose. The purpose of this work is to develop a simulation model for adaptive control of the braking process of a multi-axle vehicle using a spare (emergency) braking system, taking into account the simulation of the dynamics of the drive and the variability of the adhesion properties between the tire of the vehicle wheel and the road surface. Methodology. To achieve this goal, it is necessary to develop a simulation model of the brake drive in an adaptive mode, implement a model of the interaction of the tire with the road surface, and implement a model of the braking dynamics of a multi-axle vehicle in the event of a malfunction of its service brake system. Originality. The proposed key criterion (Kr) for changing the throttle section in electro-pneumatic pressure modulators, which provide adaptive air inlet or outlet from the corresponding brake chambers of the drive, during simulation, made it possible to simulate the operation of the drive circuits in the adaptive mode. It has been established that, depending on the potential for the realization of the adhesion between the tires of automobile wheels and the road surface, the pressure in the electro-pneumatic brake drive with its adaptive regulation can be increased by no more than 0.04 MPa.
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Han, Dong Seop, Geun Jo Han, and Dong Hwan Choi. "A Study on Durability Enhancement of Band Brake for Mooring Winch." Advanced Materials Research 201-203 (February 2011): 314–17. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.314.
Повний текст джерелаАнотація:
The brake system is very important part of the machine working. The mooring winch brake holds the ship on the harbor. But sometimes it appeared the excessive stress and brake lining would be broken. So it is necessary to change the shape of brake system with improve the durability of brake band. In this research, three models, such as a single brake shoe with a uniform thickness, a dual brake shoe with a uniform thickness, and a dual brake shoe with different thickness, are adopted as analytic model. In order to evaluate the strength of band brake according to the shape of brake shoe, the finite element analysis for three models is carried out by using ANSYS Workbench.
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Kum, Daehyun, and Hoon Sung Chwa. "Adaptive Brake System Software Platform for Self-Driving Cars." Journal of Institute of Control, Robotics and Systems 27, no. 3 (March 31, 2021): 197–201. http://dx.doi.org/10.5302/j.icros.2021.20.0178.
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Nadeau, Jonathan, Philippe Micheau, and Maxime Boisvert. "Collaborative control of a dual electro-hydraulic regenerative brake system for a rear-wheel-drive electric vehicle." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 4 (February 16, 2018): 1035–46. http://dx.doi.org/10.1177/0954407018754678.
Повний текст джерелаАнотація:
Within the field of electric vehicles, the cooperative control of a dual electro-hydraulic regenerative brake system using the foot brake pedal as the sole input of driver brake requests is a challenging control problem, especially when the electro-hydraulic brake system features on/off solenoid valves which are widely used in the automotive industry. This type of hydraulic actuator is hard to use to perform a fine brake pressure regulation. Thus, this paper focuses on the implementation of a novel controller design for a dual electro-hydraulic regenerative brake system featuring on/off solenoid valves which track an “ideal” brake force distribution. As an improvement to a standard brake force distribution, it can provide the reach of the maximum braking adherence and can improve the energy recovery of a rear-wheel-drive electric vehicle. This improvement in energy recovery is possible with the complete substitution of the rear hydraulic brake force with a regenerative brake force until the reach of the electric powertrain constraints. It is done by performing a proper brake pressure fine regulation through the proposed variable structure control of the on/off solenoid valves provided by the hydraulic platform of the vehicle stability system. Through road tests, the tracking feasibility of the proposed brake force distribution with the mechatronic system developed is validated.
Дисертації з теми "Dual adaptive brake system"
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Мартинець, Тетяна Вікторівна. "Розширення області застосування антиблокувальних систем легкових автомобілів шляхом спрощення конструкції модуляторів тиску". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/35084.
Повний текст джерелаАнотація:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.22.02 – автомобілі та трактори. Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017.
З метою розширення області застосування АБС за рахунок зниження вартості модулятора тиску досліджено процес осциляційної модуляції тиску. Запропоновано конструкцію осциляційного модулятора, який задовольняє всі висунуті до нього вимоги, та доведено можливість його застосування в якості виконавчого елемента у складі дуальних адаптивних гальмівних системах. Порівняльний аналіз відомих способів модуляції тиску в гідравлічному гальмівному приводі показав, що тільки спосіб осциляційної модуляції не вимагає для своєї реалізації дорогих конструктивних елементів (електромагнітних клапанів, насосів, що підкачують, крокових електродвигунів і т.п.), що дозволяє знизити вартість модуляторів при їх застосуванні. Моделювання процесу осциляційної модуляції та лабораторні випробування осциляційного модулятора показали:
– принципову можливість осциляційної модуляції у всьому необхідному діапазоні зміни тиску від 0 до 10 МПа;
– працездатність запропонованої конструкції модулятора і його відповідність усім пред’явленим до модулятору АБС вимогам.
Дослідження роботи осциляційного модулятора у складі дуальної адаптивної гальмівної системи, виконані шляхом моделювання процесу гальмування автомобіля при різних станах дорожньої поверхні та режимах руху підтвердили, що застосування осциляційного модулятора не погіршують показники ефективності гальмування, стійкості і керованості у порівнянні з відомими.The dissertation on competition of a scientific degree of candidate of technical sciences, speciality 05.22.02 – cars and tractors. National technical university "Kharkiv polytechnic institute". – Kharkiv, 2017. With the of expanding the field of application of anti-block system by reducing the value of the pressure modulator investigated the process of the oscillating modulation of the pressure. The proposed design of the oscillating modulator that meets all applicable requirements and proved the possibility of its use as an clement in the composition of the dual adaptive brake systems. Comparative analysis of the known methods of modulation of the pressure in the hydraulic brake drive showed that the only way of oscillating modulation does not require expensive structural elements (solenoid valves, booster pumps, stepper motors, etc.) that can reduce the cost of modulators in its application. Modeling of oscillating modulation process and laboratory tests of oscillating modulator showed: – principle possibility of oscillating modulation in all the required range of pressure changes from 0 to 10 МПА; – the efficiency of the proposed design of the modulator and its compliance with all requirements to the anti-block system modulator. Research work of oscillating modulator comprising a dual adaptive brake system, made by modeling the process of deceleration of the vehicle under different conditions of road surface and driving conditions confirmed that the application of an oscillating modulator does not degrade the braking efficiency, stability and controllability with the known.
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Мартинець, Тетяна Вікторівна. "Розширення області застосування антиблокувальних систем легкових автомобілів шляхом спрощення конструкції модуляторів тиску". Thesis, Харківський державний автомобільно-дорожній університет, 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/35082.
Повний текст джерелаАнотація:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.22.02 – автомобілі та трактори. Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017.
З метою розширення області застосування АБС за рахунок зниження вартості модулятора тиску досліджено процес осциляційної модуляції тиску. Запропоновано конструкцію осциляційного модулятора, який задовольняє всі висунуті до нього вимоги, та доведено можливість його застосування в якості виконавчого елемента у складі дуальних адаптивних гальмівних системах. Порівняльний аналіз відомих способів модуляції тиску в гідравлічному гальмівному приводі показав, що тільки спосіб осциляційної модуляції не вимагає для своєї реалізації дорогих конструктивних елементів (електромагнітних клапанів, насосів, що підкачують, крокових електродвигунів і т.п.), що дозволяє знизити вартість модуляторів при їх застосуванні. Моделювання процесу осциляційної модуляції та лабораторні випробування осциляційного модулятора показали:
– принципову можливість осциляційної модуляції у всьому необхідному діапазоні зміни тиску від 0 до 10 МПа;
– працездатність запропонованої конструкції модулятора і його відповідність усім пред’явленим до модулятору АБС вимогам.
Дослідження роботи осциляційного модулятора у складі дуальної адаптивної гальмівної системи, виконані шляхом моделювання процесу гальмування автомобіля при різних станах дорожньої поверхні та режимах руху підтвердили, що застосування осциляційного модулятора не погіршують показники ефективності гальмування, стійкості і керованості у порівнянні з відомими.The dissertation on competition of a scientific degree of candidate of technical sciences, speciality 05.22.02 – cars and tractors. National technical university "Kharkiv polytechnic institute". – Kharkiv, 2017. With the of expanding the field of application of anti-block system by reducing the value of the pressure modulator investigated the process of the oscillating modulation of the pressure. The proposed design of the oscillating modulator that meets all applicable requirements and proved the possibility of its use as an clement in the composition of the dual adaptive brake systems. Comparative analysis of the known methods of modulation of the pressure in the hydraulic brake drive showed that the only way of oscillating modulation does not require expensive structural elements (solenoid valves, booster pumps, stepper motors, etc.) that can reduce the cost of modulators in its application. Modeling of oscillating modulation process and laboratory tests of oscillating modulator showed: – principle possibility of oscillating modulation in all the required range of pressure changes from 0 to 10 МПА; – the efficiency of the proposed design of the modulator and its compliance with all requirements to the anti-block system modulator. Research work of oscillating modulator comprising a dual adaptive brake system, made by modeling the process of deceleration of the vehicle under different conditions of road surface and driving conditions confirmed that the application of an oscillating modulator does not degrade the braking efficiency, stability and controllability with the known.
3
Semsir, Emine Zeynep. "Adaptive Beam Control Of Dual Beam Phased Array Antenna System." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610695/index.pdf.
Повний текст джерелаАнотація:
In this study, the Dual Beam Phased Array Antenna System designed for COST260* project is upgraded to have the abilities of beam steering, tracking and direction finding by providing the necessary computer codes using C++ Programming Language. The functions of new prototype are tested to verify the operation.
*COST260 project was an adaptive phased array receiving antenna system for satellite communication, which was operating at 11.49-11.678 GHz band.
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Evans, John W. III. "Itk is a Dual Action Regulator of Immunoreceptor Signaling in the Innate and Adaptive Immune System: A Dissertation." eScholarship@UMMS, 2013. https://escholarship.umassmed.edu/gsbs_diss/688.
Повний текст джерелаАнотація:
The cells and molecules that comprise the immune system are essential for mounting an effective response against microbes. A successful immune response limits pathology within the host while simultaneously eliminating the pathogen. The key to this delicate balance is the correct recognition of the pathogen and the appropriate response of immune cells. Cellular activation originates through receptors that relay information about the state of the microenvironment to different compartments within the cell. The rapid relay of information is called signal transduction and employs a network of signaling mediators such as kinases, phosphatases, adaptor molecules, and transcription factors. IL-2 inducible T cell kinase (Itk) is a non-receptor tyrosine kinase that is an integral component of signal transduction downstream of many immunoreceptors. This dissertation describes two distinct pathways that utilize Itk in both phases of the immune response.
T cells use the TCR to sense a multitude of peptide-based ligands and to transmit signals inside the cell to activate cellular function. In this regard, the diversity of ligands the T cells encounter can be portrayed as analog inputs. Once a critical threshold is met, signaling events transpire in close proximity to the plasma membrane to activate major downstream pathways in the cell. The majority of these pathways are digital in nature resulting in the on or off activation of T cells. We find, however, that altering the TCR signal strength that a T cell receives can result in an analog-based response. Here, the graded expression of a transcription factor, IRF4, is modulated through the activity of Itk. We link this graded response to an NFAT-mediated pathway in which the digital vs. analog nature has been previously uncharacterized. Finally, we demonstrate that the repercussions of an analog signaling pathway is the altered expression of a second transcription factor, Eomes, which is important in the differentiation and function of T cells. These results suggest that Itk is crucial in the modulation of TCR signal strength.
Mast cells primarily rely on the IgE-bound FcεR1 for pathogen recognition. Crosslinking this receptor activates mast cells and results in degranulation and cytokine production via an expansive signaling cascade. Upon stimulation, Itk is recruited to the plasma membrane and phosphorylated. Little else is known about how Itk operates inside of mast cells. We find that mast cells lacking Itk are hyperresponsive to FcεR1-mediated activation. This is most apparent in the amount of IL-4 and IL-13 produced in comparison to wild-type mast cells. Increased cytokine production was accompanied by elevated and sustained signaling downstream of the FcεR1. Finally, biochemical evidence demonstrates that Itk is part of an inhibitory complex containing the phosphatase SHIP-1. These results indicate a novel function for Itk as a negative regulator in FcεR1- mediated mast cell activation.
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Evans, John W. III. "Itk is a Dual Action Regulator of Immunoreceptor Signaling in the Innate and Adaptive Immune System: A Dissertation." eScholarship@UMMS, 2007. http://escholarship.umassmed.edu/gsbs_diss/688.
Повний текст джерелаАнотація:
The cells and molecules that comprise the immune system are essential for mounting an effective response against microbes. A successful immune response limits pathology within the host while simultaneously eliminating the pathogen. The key to this delicate balance is the correct recognition of the pathogen and the appropriate response of immune cells. Cellular activation originates through receptors that relay information about the state of the microenvironment to different compartments within the cell. The rapid relay of information is called signal transduction and employs a network of signaling mediators such as kinases, phosphatases, adaptor molecules, and transcription factors. IL-2 inducible T cell kinase (Itk) is a non-receptor tyrosine kinase that is an integral component of signal transduction downstream of many immunoreceptors. This dissertation describes two distinct pathways that utilize Itk in both phases of the immune response.
T cells use the TCR to sense a multitude of peptide-based ligands and to transmit signals inside the cell to activate cellular function. In this regard, the diversity of ligands the T cells encounter can be portrayed as analog inputs. Once a critical threshold is met, signaling events transpire in close proximity to the plasma membrane to activate major downstream pathways in the cell. The majority of these pathways are digital in nature resulting in the on or off activation of T cells. We find, however, that altering the TCR signal strength that a T cell receives can result in an analog-based response. Here, the graded expression of a transcription factor, IRF4, is modulated through the activity of Itk. We link this graded response to an NFAT-mediated pathway in which the digital vs. analog nature has been previously uncharacterized. Finally, we demonstrate that the repercussions of an analog signaling pathway is the altered expression of a second transcription factor, Eomes, which is important in the differentiation and function of T cells. These results suggest that Itk is crucial in the modulation of TCR signal strength.
Mast cells primarily rely on the IgE-bound FcεR1 for pathogen recognition. Crosslinking this receptor activates mast cells and results in degranulation and cytokine production via an expansive signaling cascade. Upon stimulation, Itk is recruited to the plasma membrane and phosphorylated. Little else is known about how Itk operates inside of mast cells. We find that mast cells lacking Itk are hyperresponsive to FcεR1-mediated activation. This is most apparent in the amount of IL-4 and IL-13 produced in comparison to wild-type mast cells. Increased cytokine production was accompanied by elevated and sustained signaling downstream of the FcεR1. Finally, biochemical evidence demonstrates that Itk is part of an inhibitory complex containing the phosphatase SHIP-1. These results indicate a novel function for Itk as a negative regulator in FcεR1- mediated mast cell activation.
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Rui, Yikang. "Urban Growth Modeling Based on Land-use Changes and Road Network Expansion." Doctoral thesis, KTH, Geodesi och geoinformatik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122182.
Повний текст джерелаАнотація:
A city is considered as a complex system. It consists of numerous interactivesub-systems and is affected by diverse factors including governmental landpolicies, population growth, transportation infrastructure, and market behavior.Land use and transportation systems are considered as the two most importantsubsystems determining urban form and structure in the long term. Meanwhile,urban growth is one of the most important topics in urban studies, and its maindriving forces are population growth and transportation development. Modelingand simulation are believed to be powerful tools to explore the mechanisms ofurban evolution and provide planning support in growth management. The overall objective of the thesis is to analyze and model urban growth basedon the simulation of land-use changes and the modeling of road networkexpansion. Since most previous urban growth models apply fixed transportnetworks, the evolution of road networks was particularly modeled. Besides,urban growth modeling is an interdisciplinary field, so this thesis made bigefforts to integrate knowledge and methods from other scientific and technicalareas to advance geographical information science, especially the aspects ofnetwork analysis and modeling. A multi-agent system was applied to model urban growth in Toronto whenpopulation growth is considered as being the main driving factor of urbangrowth. Agents were adopted to simulate different types of interactiveindividuals who promote urban expansion. The multi-agent model with spatiotemporalallocation criterions was shown effectiveness in simulation. Then, anurban growth model for long-term simulation was developed by integratingland-use development with procedural road network modeling. The dynamicidealized traffic flow estimated by the space syntax metric was not only used forselecting major roads, but also for calculating accessibility in land-usesimulation. The model was applied in the city centre of Stockholm andconfirmed the reciprocal influence between land use and street network duringthe long-term growth. To further study network growth modeling, a novel weighted network model,involving nonlinear growth and neighboring connections, was built from theperspective of promising complex networks. Both mathematical analysis andnumerical simulation were examined in the evolution process, and the effects ofneighboring connections were particular investigated to study the preferentialattachment mechanisms in the evolution. Since road network is a weightedplanar graph, the growth model for urban street networks was subsequentlymodeled. It succeeded in reproducing diverse patterns and each pattern wasexamined by a series of measures. The similarity between the properties of derived patterns and empirical studies implies that there is a universal growthmechanism in the evolution of urban morphology. To better understand the complicated relationship between land use and roadnetwork, centrality indices from different aspects were fully analyzed in a casestudy over Stockholm. The correlation coefficients between different land-usetypes and road network centralities suggest that various centrality indices,reflecting human activities in different ways, can capture land development andconsequently influence urban structure. The strength of this thesis lies in its interdisciplinary approaches to analyze andmodel urban growth. The integration of ‘bottom-up’ land-use simulation androad network growth model in urban growth simulation is the major contribution.The road network growth model in terms of complex network science is anothercontribution to advance spatial network modeling within the field of GIScience.The works in this thesis vary from a novel theoretical weighted network modelto the particular models of land use, urban street network and hybrid urbangrowth, and to the specific applications and statistical analysis in real cases.These models help to improve our understanding of urban growth phenomenaand urban morphological evolution through long-term simulations. Thesimulation results can further support urban planning and growth management.The study of hybrid models integrating methods and techniques frommultidisciplinary fields has attracted a lot attention and still needs constantefforts in near future.QC 20130514
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Коптовець, Олександр Миколайович, Александр Николаевич Коптовец та О. М. Koptovets. "Розвиток наукових основ розробки гальмівних систем рухомого складу шахтного рейкового транспорту високого технічного рівня". Thesis, Видавництво НГУ, 2013. http://ir.nmu.org.ua/handle/123456789/778.
Повний текст джерелаАнотація:
Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.05.06 – гірничі машини. – Державний вищий навчальний заклад
«Національний гірничий університет» Міністерства освіти і науки, молоді та
спорту України, Дніпропетровськ, 2013.Диссертация на соискание учетной степени доктора технических наук по специальности 05.05.06 – горные машины. – Государственное высшее учебное заведение «Национальный горный университет» Министерства образования и науки, молодежи и спорта Украины, Днепропетровск, 2013.
У дисертаційній роботі розв'язана актуальна наукова проблема обґрунтування методів управління силою тертя в робочих процесах гальма за величиною і у функції швидкості ковзання, показниками ефективності гальма та гальмування рухомого складу рейкового транспорту шахт на основі ідентифікації спільного збудження кінематично вимушених коливань за рахунок дискретності і конструктивних зв'язків контакту тертя з фрикційними коливаннями, застосування адаптивного механізму змінної структури гальма і варіаційного формулювання у вигляді квазіваріаційної нерівності нелінійної динамічної задачі з тертям.
Система подземного транспорта при развитии подразумевает объединение преимуществ рельсового и конвейерного транспорта. Электровозная откатка относится к объектам с наиболее благоприятными предпосылками роботизации. Внедрение робототехнического комплекса откатки наиболее эффективно в магистральных выработках с интенсивными грузопотоками от очистных и подготовительных работ, кольцевой схемой движения, погрузкой и разгрузкой состава по ходу и требует оптимизации эффективности тяги и торможения поездов. На шахтных локомотивах, где размещается тормозное оборудование поезда, за счет изменения силы трения тормозного механизма от скорости движения и тормозного нажатия мощность его при скорости начала торможения 3 м/с уменьшается в 3 раза, при 5 м/с – 11 раз. В диссертационной работе решена научная проблема обоснования методов управления силой трения в рабочем процессе тормоза по величине и в функции скорости скольжения, показателями эффективности тормоза и торможения подвижного состава рельсового транспорта шахт на основе идентификации совместного возбуждения кинематически вынужденых колебаний за счёт дискретности и конструктивных связей контакта трения с фрикционными колебаниями, применения адаптивного механизма переменной структуры тормоза и вариационной формулировки в виде квазивариационного неравенства нелинейной динамической задачи с трением. Функционально-морфологический анализ позволяет классифицировать структуру тормоза с напряженным замкнутым кинематическим контуром, в ко- тором тормозная передача относится к неассуровым группам отрицательного порядка, тормоз является адаптивным механизмом с переменной структурой, структурно-неопределенной трибологической системой и обладает видом структурной неопределенности по количеству и составу входных переменных в моделях зависимости силы (коэффициента) трения. Разработана регрессионная модель кинетической характеристики трения колодочно-колесного тормоза шахтных локомотивов в условиях структурной неопределенности. Задача регрессионного анализа поставлена в широком смысле. Выполнен спектральный анализ усилий и перемещений масс в тормозном механизме, экспериментально определены спектрограммы виброперемещений тормозной колодки и переменных составляющих нормальных и тангенциальных усилий нагружения тормозного механизма. Частота и амплитуда высоко- частотных колебаний до 1 кГц изменяется в зависимости от параметров тормозного режима, упругих и диссипативных сил нагружения, что в состоянии тормоза выражается изменением коэффициентов регрессии в статистической модели характеристики трения тормоза. Разработаны основные положения теории тормозной колодки для определения структуры и параметров динамической модели тормозного механизма, измерительного и обрабатывающего комплекса аппаратуры. Разработана математическая модель тяги и движения шахтных поездов с учетом неравнозамедленного движения при торможении. Для идентификации исследуемого состояния управляемого движения шахтных поездов выполнено решение задачи классификации, в которой из двух совокупностей показателей тяги и торможения построено классификационное правило, позволяющее установить технический уровень подвижного состава по принадлежности к одной совокупности. Для интегральной оценки использования сцепной массы локомотива при торможении шахтных поездов на остановку определен коэффициент полезного действия тормоза. Разработаны динамические модели тормоза с учетом дискретности контакта поверхности трения тормозной колодки, конструктивных связей и распределения усилий по шероховатым поверхностям, установившихся и неустановившихся режимов движения. Вариационная формулировка в виде квазивариационного неравенства колебательной системы при использовании разностных схем позволяет получить при определенных значениях весовых коэффициентов решения нелинейной динамической задачи с трением. Экспериментальными методами периодических и промышленных испытаний шахтного подвижного состава с использованием планирования экспериментов и статистического моделирования для идентификации параметров и состояний динамических моделей тормоза и математической модели тяги и движения шахтных поездов получены тягово-энергетические и виброшумовые характеристики локомотивов, расчетные нормативные значения ходовых качеств вагонов. Классификация показателей назначения тормоза, алгоритм и программное обеспечение для моделирования тяги и движения шахтных поездов, метод определения технического уровня подвижного состава по эффективности тяги и торможения позволяет повысить производительность и безопасность локомотивного транспорта и расширить область применения на профиле пути от 0,005 до 0,050. Разработан алгоритм и программное обеспечение моделирования фрикционных колебаний в тормозе для управления силой трения по величине и в функции скорости движения, что позволяет получить рабочие характеристики в соответствии с его назначением, повысить КПД и надежность тормоза. Результаты работы внедрены в отраслевой стандарт Минуглепрома Украины СОУ 10.1.00155790.007:2006, нашли практическое использование на ОАО «Дружковский машзавод» и ДонУГИ при разработке и испытаниях опытных образцов электровозов АРВ10ГЭ, АВ8Т и АП8Т с гидротормозной системой и внедрены в учебный процесс при подготовке специалистов по специальностям «Горное оборудование» и «Разработка месторождений полезных ископаемых» в Государственном ВУЗ «Национальный горный университет». Внедрение результатов работы имеет социальный эффект за счет повышения технического уровня, надежности и безопасности локомотивной откатки на нормальном и тяжелом профиле рельсового пути.
The dissertation has solved burning scientific problem of justifying methods of control of frictional force under the exploitation conditions of brake in magnitude, and as a function of slipping motion velocity, measures of mine rail haulage brake efficiency as well as its braking on the basis of identifying general excitation of kinematically forced oscillations owing to dimensional resolution and ratio of friction contact and friction oscillations; use of adaptive mechanism of shiftable structure and variational definition in terms of quasivariational inequality of nonlinear dynamic problem with friction.
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Su, Geng Yi, and 蘇耿毅. "Application of the Brake by Wire Systemfor Adaptive Cruise Control System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/19665576843676941884.
Повний текст джерелаАнотація:
碩士大葉大學
車輛工程學系碩士班
96
This study established the integration technology and methodology for vehicle Adaptive Cruise Control (ACC) active brake control subsystems. Experimental data including the brake pedal position and force, master and slave cylinder pressure and travel were incorporated to build and to validate the active brake system dynamic model developed by object oriented software Matlab/Simulink®. The brake system dynamic simulation model was integrated to the vehicle longitudinal dynamic program to calculate the vehicle deceleration response to the active brake and driver brake command. The slave cylinder brake pressure from each wheel simulated and measured can then be used to calculate the resulting brake force and the corresponding vehicle deceleration which can be later validated. The developed vehicle dynamic model considered the variation of brake force of the front and rear wheels in ACC vehicle. Since the ACC system requires vehicle follow the preceding vehicle with a safe distance on either straight line or turning drive condition, the active brake and radar signal must integrated to assure their performance can satisfy the requirement of ISO 15622 ACC system standard. This integration methodology can reduce the time and expanse for establishing the research and development capacity for ACC system and active brake controller thus increase the vehicle safety and reliability.
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Yang, Cheng-Che, and 楊承哲. "Application to Vehicle Brake System using Adaptive Sliding Mode Control with Fuzzy Composition." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/58591022736675080569.
Повний текст джерелаАнотація:
碩士國立屏東科技大學
車輛工程系碩士班
93
This thesis addresses the problem of controlling a vehicle motion system by continuously adjusting the brake torque. In order to satisfy these specifications, firstly a deceleration trajectory must be planned, before the controller desired. At braking process, the vehicle velocity and deceleration will track the trajectory. An full-order model which consists of the vehicle motion subsystem, wheel dynamics, and servo hydraulic dynamics is under consideration. There are two kinds of design scenarios proposed in this thesis. In the first type of scenario is to design the controllers separately according to two dynamic conditions which are arising from different values of slip ratio. Then these two separately designed controllers are incorporated based on fuzzy concept. For the second controller design, besides, the different dynamic models stemming from different road conditions are first merged using TSK model approximation method. On the basis of the developed model, an adaptive sliding model control scheme is then proposed. After the mechanical part of the full-order system is achieved. The controller for hydraulic counterpart is finally fimished by adopting adaptive control approach. Lyapunov functions for the two types of control are proposed to guarantee the asymptotical stability of the vehicle motion systems. To demonstrate the validity of the design, several simulations are also performed and discussed.
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LIN, LONG-XIONG, and 林龍雄. "Study of dual sampling rate in adaptive internal model control system." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/25524392809914780586.
Повний текст джерелаЧастини книг з теми "Dual adaptive brake system"
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Filatov, Nikolai M., and Heinz Unbehauen. "13. ROBUSTNESS AGAINST UNMODELED EFFECTS AND SYSTEM STABILITY." In Adaptive Dual Control, 148–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-39994-0_13.
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Costanzo, Antonio, Valeria Loscri’, and Sandra Costanzo. "Adaptive Dual Color Visible Light Communication (VLC) System." In Advances in Intelligent Systems and Computing, 1478–87. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77712-2_143.
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Gao, Miaomiao, Qiang Chen, Liang Tao, and Yurong Nan. "Adaptive Synchronization Control for Dual-Manipulator System Using Finite Time Parameter Estimation." In Proceedings of 2018 Chinese Intelligent Systems Conference, 473–85. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2291-4_47.
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Wang, Minlin, and Xuemei Ren. "Adaptive Dynamic Surface Control for Dual-Motor Driving System with H∞ Performance." In Proceedings of 2016 Chinese Intelligent Systems Conference, 335–44. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2338-5_33.
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Liu, Fei, Arnaud Lelevé, Damien Eberard, and Tanneguy Redarce. "A Dual-User Teleoperation System with Adaptive Authority Adjustment for Haptic Training." In New Trends in Medical and Service Robots, 165–77. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30674-2_13.
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Génin, Chloé, Dirk Schneider, and Ralf Stark. "Dual-Bell Nozzle Design." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 395–406. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_25.
Повний текст джерелаАнотація:
Abstract The dual-bell nozzle is an altitude adaptive nozzle concept that offers two operation modes. In the framework of the German Research Foundation Special Research Field SFB TRR40, the last twelve years have been dedicated to study the dual-bell nozzle characteristics, both experimentally and numerically. The obtained understanding on nozzle contour and inflection design, transition behavior and transition prediction enabled various follow-ups like a wind tunnel study on the dual-bell wake flow, a shock generator study on a film cooled wall inflection or, in higher scale, the hot firing test of a thrust chamber featuring a film cooled dual-bell nozzle. A parametrical system study revealed the influence of the nozzle geometry on the flow behavior and the resulting launcher performance increase.
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Iyiola-Tunji, Adetunji Oroye, James Ijampy Adamu, Paul Apagu John, and Idris Muniru. "Dual Pathway Model of Responses Between Climate Change and Livestock Production." In African Handbook of Climate Change Adaptation, 523–62. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_230.
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AbstractThis chapter was aimed at evaluating the responses of livestock to fluctuations in climate and the debilitating effect of livestock production on the environment. Survey of livestock stakeholders (farmers, researchers, marketers, and traders) was carried out in Sahel, Sudan, Northern Guinea Savannah, Southern Guinea Savannah, and Derived Savannah zones of Nigeria. In total, 362 respondents were interviewed between April and June 2020. The distribution of the respondents was 22 in Sahel, 57 in Sudan, 61 in Northern Guinea Savannah, 80 in Southern Guinea Savannah, and 106 in Derived Savannah. The respondents were purposively interviewed based on their engagement in livestock production, research or trading activities. Thirty-eight years’ climate data from 1982 to 2019 were obtained from Nigerian Metrological Agency, Abuja. Ilela, Kiyawa, and Sabon Gari were chosen to represent Sahel, Sudan, and Northern Guinea Savannah zone of Nigeria, respectively. The data contained precipitation, relative humidity, and minimum and maximum temperature. The temperature humidity index (THI) was calculated using the formula: THI = 0.8*T + RH*(T-14.4) + 46.4, where T = ambient or dry-bulb temperature in °C and RH=relative humidity expressed as a proportion. Three Machine Learning model were built to predict the monthly minimum temperature, maximum temperature, and relative humidity respectively based on information from the previous 11 months. The methodology adopted is to treat each prediction task as a supervised learning problem. This involves transforming the time series data into a feature-target dataset using autoregressive (AR) technique. The major component of the activities of livestock that was known to cause injury to the environment as depicted in this chapter was the production of greenhouse gases. From the respondents in this chapter, some adaptive measures were stated as having controlling and mitigating effect at reducing the effect of activities of livestock on the climate and the environment. The environment and climate on the other side of the dual pathway is also known to induce stress on livestock. The concept of crop-livestock integration system is advocated in this chapter as beneficial to livestock and environment in the short and long run. Based on the predictive model developed for temperature and relative humidity in a sample location (Ilela) using Machine Learning in this chapter, there is need for development of a web or standalone application that will be useable by Nigerian farmers, meteorological agencies, and extension organizations as climate fluctuation early warning system. Development of this predictive model needs to be expanded and made functional.
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Kumar Sarkar, Pradip. "Driver Assistance Technologies." In Transportation Systems for Smart, Sustainable, Inclusive and Secure Cities [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94354.
Повний текст джерелаАнотація:
Topic: Driver Assistance Technology is emerging as new driving technology popularly known as ADAS. It is supported with Adaptive Cruise Control, Automatic Emergency Brake, blind spot monitoring, lane change assistance, and forward collision warnings etc. It is an important platform to integrate these multiple applications by using data from multifunction sensors, cameras, radars, lidars etc. and send command to plural actuators, engine, brake, steering etc. ADAS technology can detect some objects, do basic classification, alert the driver of hazardous road conditions, and in some cases, slow or stop the vehicle. The architecture of the electronic control units (ECUs) is responsible for executing advanced driver assistance systems (ADAS) in vehicle which is changing as per its response during the process of driving. Automotive system architecture integrates multiple applications into ADAS ECUs that serve multiple sensors for their functions. Hardware architecture of ADAS and autonomous driving, includes automotive Ethernet, TSN, Ethernet switch and gateway, and domain controller while Software architecture of ADAS and autonomous driving, including AUTOSAR Classic and Adaptive, ROS 2.0 and QNX. This chapter explains the functioning of Assistance Driving Technology with the help of its architecture and various types of sensors.
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Banek, Tadeusz, and Edward Kozlowski. "Active Learning in Discrete-Time Stochastic Systems." In Knowledge-Based Intelligent System Advancements, 350–71. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-61692-811-7.ch016.
Повний текст джерелаАнотація:
A general approach to self-learning based on the ideas of adaptive (dual) control is presented. This means that we consider the control problem for a stochastic system with uncertainty as a leading example. Some system’s parameters are unknown and modeled as random variables with known a’priori distribution function. To optimize an objective function, a controller has to learn the system’s parameter values. The main difficulty comes from the fact that he has to optimize the objective function parallely, i.e., at the same time. Moreover, these two goals considered separately not necessarily coincide and the main problem in the adaptive control is to find the trade-off between them. Looking from the self-learning perspective the two directions are visible. The first is to extract the learning procedure from an optimal adaptive control law and to formulate it as a Cybernetic Principle of self-learning. The second is to consider a control problem with the special objective function. This function has to measure our knowledge about unknown parameters. It can be the Fisher information (Banek & Kulikowski, 2003), the joint entropy (for example Saridis, 1988; Banek & Kozlowski, 2006), or something else. This objective function in the control problem will force a controller to steer a system along trajectories that are rich in information about unknown quantities. In this chapter the authors follow the both directions. First they obtain conditions of optimality for a general adaptive control problem and resulting algorithm for computing extremal controls. The results are then applied to the simple example of the Linear Quadratic Gaussian (LQG) problem. By using analytical results and numerical simulations the authors are able to show how control actions depend on the a’piori knowledge about a system. The first conclusion is that a natural, methodological candidate for the optimal self-learning strategy, the “certainty equivalence principle”, fails to satisfy optimality conditions. Optimal control obtained in the case of perfect system’s knowledge is not directly usable in the partial information case. The need of active learning is an essential factor. The differences between controls mentioned above are visible on a level of computations and should be interpreted on a higher level of cybernetic thinking in order to give a satisfactory explanation, perhaps in the form of another principle. Under absence of the perfect knowledge of parameters values, the control actions are restricted by some measurability requirement and the authors compute the Lagrange multiplier associated with this “information constraint”. The multiplier is called a “dual” or “shadow” price and in the literature of the subject is interpreted as an incremental value of information. The authors compute the Lagrange multiptier and analyze its evolution to see how its value changes as the time goes on. As a second sort of conclusion the authors get the self-learning characteristic coming from the information theory point of view. In the last section the authors follow the second direction. In order to estimate the speed of self-learning they choose as an objective function, the conditional entropy. They state the optimal control problem for minimizing the conditional entropy of the system under consideration. Using general results obtained at the beginning, they get the conditions of optimality and the resulting algorithm for computing the extremal controls. Optimal evolution of the conditional entropy tells much about intensivity of self-learning and its time distribution.
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Haldar, Shouvik. "Indications for Pacemakers." In Manual of Cardiovascular Medicine, 247–52. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198850311.003.0030.
Повний текст джерелаАнотація:
Heart rates outside the normal range are referred to as either bradycardia (i.e. <60 bpm) or tachycardia (i.e. >100 bpm). Bradycardia can cause symptoms such as dizziness and syncope, in general at much lower heart rates than <60 bpm. In patients with bradycardia and symptoms, pacemakers may be considered. Severe bradycardia is usually caused by intrinsic problems in the electrical conduction system, i.e. the sinoatrial node, atrioventricular junction, or His-Purkinje system. Pacemakers are comprised of a pulse generator and one or more leads that connect the generator to the heart, i.e. the atrium and/or ventricle. Therefore, pacing can be achieved with single chamber and dual chamber pacing. Pacemakers are characterized by the chamber where they pace, the chamber where they sense and the response to sensing and rate adaptive features.
Тези доповідей конференцій з теми "Dual adaptive brake system"
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Shi, Jialei, Chao Huang, Xiangyu Wang, and Liang Li. "Adaptive Dual-Loop Hydraulic Pressure Controller for Electric Booster Brake System." In 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE). IEEE, 2019. http://dx.doi.org/10.1109/isie.2019.8781286.
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He, Lin, Cheng Yao, Haohao Liu, Qin Shi, and Wei Ye. "Frictional-electro Composite Brake System Based On Dual Brake Pedal." In 2019 3rd Conference on Vehicle Control and Intelligence (CVCI). IEEE, 2019. http://dx.doi.org/10.1109/cvci47823.2019.8951602.
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Thammakaroon, P., and P. Tangamchit. "Adaptive brake warning system for automobiles." In 2008 8th International Conference on ITS Telecommunications. IEEE, 2008. http://dx.doi.org/10.1109/itst.2008.4740257.
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Xiong, Lu, Bing Yuan, Xueling Guang, and Songyun Xu. "Analysis and Design of Dual-Motor Electro-Hydraulic Brake System." In SAE Brake Colloquium & Exhibition - 32nd Annual. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2014. http://dx.doi.org/10.4271/2014-01-2532.
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Bolante, K., N. Carrillo, H. Tang, and T. Takahashi. "Adjustable rollator with dual brake system to enhance stability." In 2012 38th Annual Northeast Bioengineering Conference (NEBEC). IEEE, 2012. http://dx.doi.org/10.1109/nebc.2012.6207067.
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Iijima, Tetsuya, Akira Higashimata, Satoshi Tange, Kazutaka Mizoguchi, Hiroshi Kamiyama, Kiyohisa Iwasaki, and Kenichi Egawa. "Development of an Adaptive Cruise Control System with Brake Actuation." In SAE 2000 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-1353.
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Yun, Dongwon, Jeong-Hoi Koo, Sunghwi Lee, and Byungin Kim. "A Novel Safety Brake System Based on Magneto-Rheological Fluids." In ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/smasis2015-9053.
Повний текст джерелаАнотація:
This paper presents a novel Magentorheological (MR) brake with permanent magnets. The proposed MR brake can generate a braking torque at a critical rotation speed without an external power source, sensors, or controllers, making it simple and cost-effective device. The brake system consists of a rotary disk, permanent magnets, springs and MR fluid. Permanent magnets are attached to the rotary disk via springs, and they move outward through grooves with two different gap distances along the radial direction of the stator due to centrifugal force. Thus, the position of the magnets is dependent on the spin speed, and it can determine the magnetic fields applied to MR fluids. Proper design of the stator geometry gives the system unique torque characteristics. To show the performance of an MR brake system, the electromagnetic characteristics of the system are analyzed, and the torques generated by the brake are calculated using the result of the electromagnetic analysis. After the simulation study, a prototype brake system is constructed and its performance is experimentally evaluated. The results demonstrate the feasibility of the proposed MR brake as a speed regulator in rotating systems.
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Ren-Guang Wang, Zhao-Du Liu, Zhi-Quan Qi, Yue-Feng Ma, and Hai-Feng Cui. "Multiple Model Adaptive Control of Antilock Brake System via Backstepping Approach." In Proceedings of 2005 International Conference on Machine Learning and Cybernetics. IEEE, 2005. http://dx.doi.org/10.1109/icmlc.2005.1527013.
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Kubaisi, Rayad, Konrad Herold, Frank Gauterin, and Martin Giessler. "Regenerative Braking Systems for Electric Driven Vehicles: Potential Analysis and Concept of an Adaptive System." In SAE 2013 Brake Colloquium & Exhibition - 31st Annual. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2013. http://dx.doi.org/10.4271/2013-01-2065.
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Nadeau, J., P. Micheau, and M. Boisvert. "Model-Based Predictive Control Applied to a Dual Regenerative and Hydraulic Brake System." In 2015 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE, 2015. http://dx.doi.org/10.1109/vppc.2015.7352974.
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