Dissertations / Theses on the topic 'Active Braking'
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Niemz, Tobias. "Reducing Braking Distance by Control of Semi-Active Suspension." Phd thesis, Düsseldorf : VDI-Verl, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015623993&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textThamel, Prasadini. "Classification of Articulated hauler braking behaviours." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-95146.
Full textHe, Junjie. "Integrated vehicle dynamics control using active steering, driveline and braking." Thesis, University of Leeds, 2005. http://etheses.whiterose.ac.uk/979/.
Full textNiemz, Tobias [Verfasser]. "Reducing Braking Distance by Control of Semi-Active Suspension / Tobias Niemz." Hamburg : Diplom.de, 2014. http://d-nb.info/1117711242/34.
Full textBischof-Niemz, Tobias [Verfasser]. "Reducing Braking Distance by Control of Semi-Active Suspension / Tobias Niemz." Hamburg : Diplom.de, 2014. http://nbn-resolving.de/urn:nbn:de:101:1-2016110216361.
Full textTruong, Benny. "Development of an active braking controller for brake systems on electric motor driven vehicles." Thesis, KTH, Maskinkonstruktion (Avd.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168706.
Full textEvery, Joshua Lee. "Development of a Driver Behavior Based Active Collision Avoidance System." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429800895.
Full textMousavinejad, Seyed Eman. "Advanced Terminal Sliding Mode Control Approach to Integrated Steer-by-Wire and Differential Braking of Ground Vehicles." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/367350.
Full textThesis (Masters)
Master of Philosophy (MPhil)
Griffith School of Engineering
Full Text
Sahin, Murat. "Design And Simulation Of An Abs For An Integrated Active Safety System For Road Vehicles." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608801/index.pdf.
Full textJentsch, Martin, Philipp Lindner, Birgit Spanner-Ulmer, Gerd Wanielik, and Josef F. Krems. "Nutzerakzeptanz von Aktiven Gefahrenbremsungen bei statischen Zielen." Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-150054.
Full textGirbés, Juan Vicent. "Clothoid-based Planning and Control in Intelligent Vehicles (Autonomous and Manual-Assisted Driving)." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/65072.
Full text[ES] En la actualidad se comercializan infinidad de productos de electrónica de consumo que incorporan elementos y características procedentes de avances en el sector de la robótica móvil. Por ejemplo, el conocido robot aspirador Roomba de la empresa iRobot, el cual pertenece al campo de la robótica de servicio, uno de los más activos en el sector. También hay numerosos sistemas robóticos autónomos en almacenes y plantas industriales. Es el caso de los vehículos autoguiados (AGVs), capaces de conducir de forma totalmente autónoma en entornos muy estructurados. Además de en la industria y en electrónica de consumo, dentro del campo de la automoción también existen dispositivos que dotan de cierta inteligencia al vehículo, derivados la mayoría de las veces de avances en robótica móvil. De hecho, cada vez con mayor frecuencia los vehículos incorporan sistemas avanzados de asistencia al conductor (ADAS por sus siglas en inglés), tales como control de navegación con regulación automática de velocidad, asistente de cambio de carril y adelantamiento, aparcamiento automático o aviso de colisión, entre otras prestaciones. No obstante, pese a todos los avances siguen existiendo problemas sin resolver y que pueden mejorarse. La colisión y el vuelco destacan entre los accidentes más comunes en vehículos con conducción tanto manual como autónoma. De hecho, la dificultad de conducir en entornos desestructurados compartiendo el espacio con otros agentes móviles, tales como coches o personas, hace casi imposible garantizar la conducción sin accidentes. Es por ello que la búsqueda de técnicas para mejorar la seguridad en vehículos inteligentes, ya sean de conducción autónoma o manual asistida, es un tema que siempre está en auge en la comunidad robótica. La presente tesis se centra en el diseño de herramientas y técnicas de planificación y control de vehículos inteligentes, para la mejora de la seguridad y el confort. La disertación se ha dividido en dos partes, la primera sobre conducción autónoma y la segunda sobre conducción manual asistida. El principal nexo de unión es el uso de clotoides como elemento de generación de trayectorias y detección de colisiones. Entre los problemas que se resuelven destacan la evitación de obstáculos, la evitación de vuelcos y la asistencia avanzada al conductor para evitar colisiones con peatones.
[CAT] En l'actualitat es comercialitzen infinitat de productes d'electrònica de consum que incorporen elements i característiques procedents d'avanços en el sector de la robòtica mòbil. Per exemple, el conegut robot aspirador Roomba de l'empresa iRobot, el qual pertany al camp de la robòtica de servici, un dels més actius en el sector. També hi ha nombrosos sistemes robòtics autònoms en magatzems i plantes industrials. És el cas dels vehicles autoguiats (AGVs), els quals són capaços de conduir de forma totalment autònoma en entorns molt estructurats. A més de en la indústria i en l'electrònica de consum, dins el camp de l'automoció també existeixen dispositius que doten al vehicle de certa intel·ligència, la majoria de les vegades derivats d'avanços en robòtica mòbil. De fet, cada vegada amb més freqüència els vehicles incorporen sistemes avançats d'assistència al conductor (ADAS per les sigles en anglés), com ara control de navegació amb regulació automàtica de velocitat, assistent de canvi de carril i avançament, aparcament automàtic o avís de col·lisió, entre altres prestacions. No obstant això, malgrat tots els avanços segueixen existint problemes sense resoldre i que poden millorar-se. La col·lisió i la bolcada destaquen entre els accidents més comuns en vehicles amb conducció tant manual com autònoma. De fet, la dificultat de conduir en entorns desestructurats compartint l'espai amb altres agents mòbils, tals com cotxes o persones, fa quasi impossible garantitzar la conducció sense accidents. És per això que la recerca de tècniques per millorar la seguretat en vehicles intel·ligents, ja siguen de conducció autònoma o manual assistida, és un tema que sempre està en auge a la comunitat robòtica. La present tesi es centra en el disseny d'eines i tècniques de planificació i control de vehicles intel·ligents, per a la millora de la seguretat i el confort. La dissertació s'ha dividit en dues parts, la primera sobre conducció autònoma i la segona sobre conducció manual assistida. El principal nexe d'unió és l'ús de clotoides com a element de generació de trajectòries i detecció de col·lisions. Entre els problemes que es resolen destaquen l'evitació d'obstacles, l'evitació de bolcades i l'assistència avançada al conductor per evitar col·lisions amb vianants.
Girbés Juan, V. (2016). Clothoid-based Planning and Control in Intelligent Vehicles (Autonomous and Manual-Assisted Driving) [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/65072
TESIS
Marti, Geoffrey. "Rôle de multiples affordances dans la prise de décision et la régulation de l'action chez le conducteur : L'exemple du franchissement d'intersection." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4024.
Full textCrossing an intersection is a typical task in which several affordances coexist, one offering the possibilities to safely cross the intersection (the main goal) and another offering the possibilities to stop the driving car to avoid a collision (the alternative goal). Based on Gibson and Crooks’ works (1938), we formalized the so-called Field of Safe Travel (FST) and Minimum Stopping Zone (MSZ) affordances in terms of critical time for safe crossing and for safe stopping, respectively. Using a virtual reality set-up with a driving simulator, three experiments have been designed to test the role of these two affordances on the decision-making and the regulation of action process. Our results, supported by a model of decision-making, reveal that drivers rely not only on the FST affordance, but also on the MSZ affordance, to choose to cross-or-not the intersection. Moreover, the joint use of these affordances is still observed when drivers have to control their velocity to perform the task when either a vehicle with a computed kinematic or a car driven by another agent is approaching. Put together, these results show that drivers take into account several possibilities for action offered by the environment (FST and MSZ affordances) to make a suitable choice and to control their speed when approaching an intersection
Renza, Jaroslav. "Jízdní dynamika traktoru." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241322.
Full textHsieh, Feng-Chi, and 謝豐吉. "Application and Design of Active Vacuum Booster Braking Systems." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/38535277448552949534.
Full text國立臺北科技大學
車輛工程系碩士班
91
In a conventional active brake system, the hydraulic actuator is applied to actively operate a brake system. However, many accessories are needed in the brake system so that the system requires more space and more cost. This research will improve a conventional vacuum booster in a brake system so that drivers can switch the brake system between an active system and a conventional system. When the brake system is switched to the active system, a solenoid valve is used to change the pressure difference in the vacuum booster to control braking force. The proposed vacuum booster will use the pressure difference between intake manifold and atmosphere. This device is a highly nonlinear system and the sliding control will be used to design a controller for the braking force control. In this research, Matlab/Simulink will be used to simulate braking force control and the proposed system will be applied to the intelligent cruise control. Because only a solenoid valve is added to the original vacuum booster, the proposed system will not occupy any extra space and will not increase component cost. The proposed system will provide the sufficient braking force for intelligent cruise control, traction control, deceleration control, and hill holder.
GIOVANNINI, FEDERICO. "Analysis of the stability of motorcycles during braking maneuvers." Doctoral thesis, 2014. http://hdl.handle.net/2158/866025.
Full textLucci, Cosimo. "Feasibility study of motorcycle autonomous emergency braking system." Doctoral thesis, 2021. http://hdl.handle.net/2158/1245260.
Full textBischof-Niemz, Tobias [Verfasser]. "Reducing braking distance by control of semi-active suspension / vorgelegt von Tobias Niemz." 2007. http://d-nb.info/98781222X/34.
Full textChang, ChinChia, and 張晉嘉. "Model Establishment and Performance Assessment for Active Regenerative Braking System of Electric Vehicles." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/04773288808485036452.
Full text國立臺灣師範大學
工業教育學系
102
This thesis mainly evaluates a brake regenerative system in electric vehicles (EVs) by using the Matlab/Simulink software package in order to recovering the optimal brake energy. The system consists of a high-power motor, a mechanical brake, lithium battery etc.. After the vehicle load information is sent to the vehicle dynamics model, the optimal brake control is conducted. We modeled the active and passive braking model based on the high-power motor dynamics. The rule-based control was used for the energy optimization. The regenerative energy was analyzed, and the optimal control model was verified and then modified. The active brake system activates the regenerative brake first, and then the mechanical brake compensates the rest of the energy. The passive energy uses the mechanical brake for the main brake power, while the regenerative brake compensates the rest. To accurately simulate the braking energy while driving, the real brake energy tested on the chassis dynamometer was compared to the model. The test brake energy was 13828 kJ, while the simulated one was 13670 kJ. The difference is only 1.14%, which indicates that the physical model can precisely emulated the vehicle brake operation. In order to comparing the effect of vehicle speed to the brake energy, three initial speeds (30 km/h, 60 km/h, and 90 km/h) and three braking time (10 sec., 20 sec., and 30 sec.) are set to be the braking conditions. Meanwhile, to simulate the normal driving, two driving cycles: FTP-75 and ECE40 are selected for the evaluation of brake regeneration. Simulation results show that with shorter braking time and higher initial speed, the regenerative brake recovers more energy. From the optimal energy recovery, the active brake system can recover 4.38% of total consumed energy, while the passive brake system recovers 0.24%. The active brake system recovers 18.25 times energy than the passive brake system.
Ting, Wei-en, and 丁偉恩. "Nonlinear and Adaptive Control of Anti-lock Braking Systems Combined with Active Suspensions." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/59060256651436550319.
Full text國立暨南國際大學
電機工程學系
92
This thesis develops a nonlinear anti-lock braking system combined with active suspensions applied to a quarter-car model by employing nonlinear and adaptive backstepping design schemes. In driving emergency, a driver always reacts to exert great efforts to step on the brake pedal in order to stop the car immediately. If the braking torque is large enough to lock wheels, then the vehicle may solely slide on the road surface and must need more braking time and distance to stop. An anti-lock braking system is able to release the wheel-locking situation and assist the car to stop at shorter distance. Although the braking distance can be reduced by the control torque from disk/drum brakes, the braking time and distance can be further improved if the normal force generated from active suspension systems is considered simultaneously. Individual controller is designed for each subsystem and an integrated algorithm is constructed to coordinate these two subsystems. As a result, the integration of antilock braking and active suspension systems indeed enhances the system performance because of reduction of braking time and distance. In addition, variation of road conditions is usually known while driving a car. Hence, a nonlinear adaptive backstepping control scheme is employed for the design of our anti-lock braking system to guarantee that our controller has the ability to adapt for various road surfaces. Finally, some comparative simulations are given to illustrate the excellent performance of our integrated anti-lock braking system.
Hou, Chia-Hsien, and 侯佳憲. "Nonlinear and Adaptive Control of Half-car Anti-lock Braking Systems with Assistance of Active Suspensions." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/80202591638908144407.
Full text國立暨南國際大學
電機工程學系
99
This thesis investigates the integration of various subsystems of an automobiles chassis. The specific focus of this research is the control design of anti-lock braking systems (ABS) combined with active suspension systems (ASS) applied to a half-car model. The performance objective for the integrated approach is defined as the reduction of longitudinal velocity in both braking time and braking distance. The braking distance not only can be decreased by supplying braking torque from driver stepping on the brake pedal, but also can be further improved if the normal force generated from ASS is considered in the meanwhile. Above all, a mathematical model of a half-car is established for the braking and suspension dynamics, and then the controllers designed by nonlinear backstepping scheme are developed to achieve our control objectives. Braking distance judgment and better braking performance capability are major skills required for a safe drive in all road conditions. The friction coefficient could be variant because of different road conditions, we so an appropriate proportion algorithm is proposed to make our controllers adapt various kinds of road conditions. For achieving maximum braking performance, fully applying suitable coordination between both front and rear brakes without locking either wheel must be considered and investigated. That is, individual controllers are developed for the subsystems and a governing algorithm is constructed to coordinate the controllers of these subsystems. Hence, a nonlinear controller designed by adaptive backstepping scheme is developed for ABS to guarantee that the controllers possess the potentials to adapt it self for uncertainty of vehicle mass.
Lashgarian, Azad Nasser. "Dynamic Modelling and Stability Controller Development for Articulated Steer Vehicles." Thesis, 2006. http://hdl.handle.net/10012/2633.
Full textFUSI, LUCA. "The molecular mechanism of the braking action of muscle." Doctoral thesis, 2009. http://hdl.handle.net/2158/591946.
Full textChiu, Zhe-Nan, and 邱哲楠. "Predicting Driver Braking Action Using Multi-Layer DeepLearning Sensory Fusion." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/2p3qnv.
Full text元智大學
資訊工程學系
106
In advanced driver assistance system (ADAS), non-timely braking action is one of the important issues because it makes drivers exposed to a terrible and dangerous driving environment. For this reason, predicting driver braking action early and accurately must appear up, which can lower the potential of unsafe driving behavior and provide drivers more time to react. In this paper, we have sensory fusion data source from inside and outside of the car and our proposed multi-layer deep learning architecture (CBL) to predict braking action, which consists of convolutional neural network (CNN) and bidirectional long short-term memory units (BL) while CNN is good at extracting driving characteristic and BL is useful for keeping time-series data. The result points that the CBL performs much better than the other two architectures: bidirectional LSTM (BL) and uni-LSTM (UL) based on the high accuracy and f-score, and it also shows leave-one-out cross validation for drivers and many interesting differences in the speed, turning and intersection from time -5s to 0s.
Machado, Luís Filipe Carvalho. "Acionamento eletrónico de velocidade variável com retificador ativo para motor de indução trifásico." Master's thesis, 2019. http://hdl.handle.net/1822/64848.
Full textGrande parte da energia elétrica consumida em todo o mundo está relacionada com o uso de motores elétricos, concretamente com o uso de motores de indução trifásicos em aplicações industriais. O acionamento destes motores por variadores eletrónicos de velocidade (VEVs) é uma solução relativamente recente, no entanto, já bastante utilizada na indústria. Por norma, os VEVs para motores de indução empregam uma ponte retificadora a díodos com o intuito de fornecer potência ao barramento CC a partir da rede elétrica. Apesar de este tipo de retificadores ser uma solução económica, estes contribuem para a degradação da qualidade de energia elétrica, dado que consomem correntes com elevado conteúdo harmónico que, por sua vez, provocam distorções na forma de onda da tensão e baixo fator de potência a montante do VEV. Além disso, não permitem inverter o fluxo de energia, tornando, por isso, inviável o processo de travagem regenerativa. Os conversores CA-CC ativos, ou retificadores ativos, surgem desta forma como solução aos problemas de qualidade de energia elétrica dos conversores CA-CC tradicionais, permitindo o consumo de corrente sinusoidal, com fator de potência unitário, o controlo da tensão ou corrente do barramento CC e um fluxo bidirecional de potência. Deste modo, a presente dissertação visa o estudo teórico, implementação e respetiva comprovação experimental de um acionamento eletrónico de velocidade variável, com conversor CA-CC ativo trifásico e conversor CC-CA trifásico do tipo fonte de tensão, para motores de indução. A solução proposta é capaz de permitir, para além do controlo da velocidade de rotação do motor, o arranque e paragem suave, a troca rápida de velocidade (na qual se inclui também a inversão do sentido de rotação), consumo de correntes sinusoidais, equilibradas e em fase com as tensões da rede elétrica e ainda a operação no modo bidirecional, viabilizando a injeção de energia à rede elétrica em processos de travagem ou inversão de velocidade do motor.
A large amount of the electricity consumed worldwide is related to the use of electric motors, specifically with the use of three-phase induction motors in industrial applications. The use of variable speed drives (VSDs) in these motors is a relatively recent solution, however, already widely used in the industry. Normally, the VSDs for induction motors employ a diode bridge rectifier in order to supply power to the DC-link from the electrical power grid. Although this type of rectifiers is an economical solution, they contribute to the degradation of the electric power quality, since they consume currents with high harmonic content that, consequently, cause distortions in the voltage waveforms and low power factor upstream the VSD. In addition, they do not allow the energy flow to be reversed, making the regenerative braking process impracticable. The active AC-DC converters, or active rectifiers, appear as a solution to the electrical power quality problems of traditional AC-DC converters, allowing a sinusoidal current consumption, with unitary power factor, voltage or current control of the DC-link and a bidirectional power flow. Thus, the present dissertation aims at the theoretical study, implementation and respective experimental verification of an electronic variable speed drive (VSD) for induction motors using a three-phase active AC-DC converter and a three-phase DC-AC converter of the voltage source type. Besides controlling the rotational speed of the motor, the proposed solution is capable of allowing the start and soft stop, quick speed changes (which also includes the reversal of the rotation direction), sinusoidal current consumption in phase with the power grid voltage and also the operation in bidirectional mode, making possible the injection of energy into the power grid in breaking processes or motor rotation reversal.
Este trabalho de mestrado está enquadrado no projeto de IC&DT “Quality4Power - Enhancing the Power Quality for Industry 4.0 in the era of Microgrids”, financiado pela Fundação para a Ciência e Tecnologia, com a referência PTDC/EEI-EEE/28813/2017.
Este trabalho de mestrado está enquadrado no projeto de IC&DT “DAIPESEV – Development of Advanced Integrated Power Electronic Systems for Electric Vehicles”, financiado pela Fundação para a Ciência e Tecnologia, com a referência PTDC/EEI‑EEE/30382/2017.