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Dissertations / Theses on the topic 'Trailer for tractor'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Quartuccio, James Nathan. "Autonomous Tractor-Trailer Stopping and Jackknifing Dynamics." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/90383.

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With autonomy becoming a reality for passenger cars, developing an autonomous for tractor-trailers is the next step for driverless roads. Tractor-trailers are heavy, large, and have a pivot joint between the tractor and trailer that makes the movement between the two more complicated. The purpose of the research presented here is to determine the best forward "looking" perception sensor that will see far out enough for the vehicle to stop in time to avoid hitting an object. In order to determine the best sensor, a review of previous sensors and autonomous vehicle sensors will be explored al

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2

Ghuge, Harshavardhan Roy Christopher J. "Detached eddy simulations of a simplified tractor-trailer geometry." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2006%20Fall/Theses/GHUGE_HARSHAVARDHAN_18.pdf.

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3

Ismail, Ofa. "Planning Method for a Reversing Single Joint Tractor-Trailer System." Thesis, Linköpings universitet, Fordonssystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177800.

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This thesis investigates the design of a local planning method for a reversing single joint tractor-trailer system that can be used in a sampling-based motion planner. The motion planner used is a Rapidly-exploring Random Tree (RRT) developed by Scania. The main objective of a local planning method is to generate a feasible path between two poses, which is needed when expanding the search tree in an RRT. The local planning method described in this thesis uses a set of curves, similar to Reeds-Shepp curves, feasible for a single joint tractor-trailer system. The curves are found by solving a co

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4

Best, Kevin B. "Tractor-trailer wheel stud tightening, torque wrench versus angle-torque tightening." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/MQ42587.pdf.

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5

Mugarza, Imanol. "Constrained dynamic path planning for a tractor and semi-trailer vehicle." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28655.

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The aim for this project is to design and implement a dynamic path planningmethod for a tractor and semi-trailer vehicle. This vehicle will be in environmentwhich is simulated as a harbour, where containers and other autonomously guidedvehicles are represented as possible objects. Various physical limitations of thevehicle are taken into consideration. For this purpose, a simulator is built, where the environment is reproduced.During the simulation, the vehicle should drive towards the goal avoiding contain-ers and other vehicles, which are sensed by a detection and tracking system. Also,a cas

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Hynén, Ulfsjöö Carl, and Theodor Westny. "Modeling and Lateral Control of Tractor-Trailer Vehicles during Aggresive Maneuvers." Thesis, Linköpings universitet, Reglerteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167473.

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In the last decades, the development of self-driving vehicles has rapidly increased. Improvements in algorithms, as well as sensor and computing hardware have led to self-driving technologies becoming a reality. It is a technology with the potential to radically change how society interacts with transportation. One crucial part of a self-driving vehicle is control schemes that can safely control the vehicle during evasive maneuvers. This work investigates the modeling and lateral control of tractor-trailer vehicles during aggressive maneuvers. Models of various complexity are used, ranging fro

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7

Gasik, Kevin Richard. "COMPARISON OF LQR AND LQR-MRAC FOR LINEAR TRACTOR-TRAILER MODEL." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2117.

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The United States trucking industry is immense. Employing over three million drivers and traveling to every city in the country. Semi-Trucks travel millions of miles each week and encompass roads that civilians travel on. These vehicles should be safe and allow efficient travel for all. Autonomous vehicles have been discussed in controls for many decades. Now fleets of autonomous vehicles are beginning their integration into society. The ability to create an autonomous system requires domain and system specific knowledge. Approaches to implement a fully autonomous vehicle have been developed u

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8

Böttger, Sören. "Development and Prototypical Implementation of a Universal Concept for a Trailer Rear View Camera." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-383.

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Manoeuvring a vehicle with additionally attached trailers is a tedious task. Albeit driver assistance systems support the driver in nearly any situation in these days, tools facilitating the manoeuvring process of extended vehicles can only rarely be found in research and especially in the market. This thesis deals with the prototypical implementation of a rear view camera parking assistance system. In particular, the visualisation of the predicted driving path of the tractor-trailer combination in the camera image is emphasised, following the representation of existing parking assistance syst

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9

Wacker, Thomas. "A preliminary study of configuration effects on the drag of a tractor-trailer combination." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25143.

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The effect of configuration changes and add-on devices on the drag reduction of a tractor-trailer is studied through wind tunnel tests using two 1/12-scale models. The configuration changes involve ground clearance, tractor-trailer gap, roof angle and back inclination while add-on devices include flow deflectors, skirts and gap seals. Moving surface boundary layer control as a means of drag reduction is also attempted. Both drag and pressure data are obtained to help identify local contributions. Results suggest that an optimum combination of configuration parameters can reduce drag up to 17%

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10

Freeman, Jacob Andrew. "Optimization Under Uncertainty and Total Predictive Uncertainty for a Tractor-Trailer Base-Drag Reduction Device." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/77168.

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One key outcome of this research is the design for a 3-D tractor-trailer base-drag reduction device that predicts a 41% reduction in wind-averaged drag coefficient at 57 mph (92 km/h) and that is relatively insensitive to uncertain wind speed and direction and uncertain deflection angles due to mounting accuracy and static aeroelastic loading; the best commercial device of non-optimized design achieves a 12% reduction at 65 mph. Another important outcome is the process by which the optimized design is obtained. That process includes verification and validation of the flow solver, a less comple

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11

Chandrasekharan, Santhosh. "Development of a tractor-semitrailer roll stability control model." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196260360.

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12

Doyle, Joshua Brian Hartfield Roy J. "Aerodynamic optimization for freight trucks using a genetic algorithm and CFD." Auburn, Ala, 2007. http://repo.lib.auburn.edu/2007%20Fall%20Theses/Doyle_Joshua_41.pdf.

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13

Nouza, Pavel. "Podvozek jednoúčelového vozu MEGA EASY." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231370.

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This diploma thesis deals with conceptual design chassis of tractor trailer with maximum weight 21 000 kg. First part of thesis introduces reader with division of constructal chassis elements. Next part deals with conceptual chassis design. The final part deals with strenght control of chassis frame, which has been designed in previous chapter. In last part of the thesis deals with stress control designed construction of the frame. Drawing documentation of chassis frame is a part of the thesis

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14

Whitmire, James. "Tractor-Trailer Simulation and the Assessment of Training Scenarios for City-Driving: Skill Building in the Area of Left and Right Turns." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4490.

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A simulated inner-city training scenario was found to increase skills in the area of turning when compared with a simulated off-track training scenario. To answer this question, two groups of ten participants (5 women and 5 men) were tested using three scripted scenarios focusing on left and right turns. The first training scenario (control group) is an off-track training scenario, which consists of a large asphalt lot and the use of orange cones; the second training scenario (experimental group) is an inner-city training scenario without the presence of vehicular traffic; and the third scenar

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15

Keller, Joacim. "Konceptframtagning av transportlösning för lastbilshytter." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-64733.

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Laxå Special Vehicles (LSV) är ett företag som har ett starkt samarbete med Scania. De modifierar och bygger olika delar till Scanias lastbilar, bland annat hytter. Scania har uppdaterat hytternas design och verksamheten i Laxå har tvingats expandera med en ny lokal i samma område. Den nya produktionen kommer kräva stor yta och LSV kommer få ont om buffertplatser. Detta projekt har fokuserat på att ta fram ett koncept för hur hytterna ska transporteras mellan lokalerna på ett så smidigt sätt som möjligt, idag används en lastbilstrailer. Konceptet skulle kunna användas som buffertzon vilket stä

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16

Peňáz, Jan. "Třístranně sklápěná korba návěsu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229275.

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This diploma thesis deals with proposal three-side tipping body of tractor semi-trailer with maximum weight 23 tons. In beginning the thesis includes background research part and design of conception body inclusive back door. In the middle part thesis contains the strength calculations using the finite element method, shape optimization and check strength calculation. Strength checks consider especially deformation and strain analysis in different load angle states. The work is finished by analytical calculations included partial body of semi-trailer. Enclosed are graphic illustrations results

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17

Ashby, Ryan Michael. "Hardware in the Loop Simulation of a Heavy Truck Braking System and Vehicle Control System Design." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366046155.

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18

Sehnal, Milan. "Vanová nástavba s otevíracím zadním čelem pro jednoúčelový vůz MEGA EASY." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231217.

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This master‘s thesis deals with a design construction of a bath body and an opening rear face for a dedicated tractor trailer MEGA EASY. The purpose of this master’s thesis is to create research and concept of the bath body and the rear face, to design mechanism for opening the rear face and to compute the construction using the finite element method. Additionally, this master’s thesis includes selected technical drawings.

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McNaull, Patrick James. "Modeling and Validation of a Heavy Truck Model with Electronic Stability Control." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250534058.

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20

Raška, Michal. "Analýza dopravních prostředků v zemědělské prvovýrobě." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231174.

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This thesis presents a comparison of fuel consumption and transportation efficiency of various transport vehicles in primary agricultural production. The first part deals with the possibility of transport of materials in agriculture. The following is a description of the compared vehicles. Finally, it describes the methodology of calculation of fuel consumption vehicles, which are then compared.

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Šetka, Martin. "Přívěs za traktor pro přepravu palivového dřeva a sypkého materiálu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231165.

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The Master´s thesis deals with the engineering design of single-axle brakeless dump trailer for a tractor designed for transporting and dumping of particulate materials and firewood. The engineering design of the trailer is based on the proposed kinematic scheme and the basic calculations that are checked by FEM analysis in Ansys Workbench. The drawing documentation is done in AutoCAD.

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Srinivasan, K. Venkatesh. "Implementation of an Unmanned Aerial Vehicle for New Generation Peterbilt Trucks." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849706/.

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As science and technology continue to advance, innovative developments in transportation can enhance product safety and security for the benefit and welfare of society. The federal government requires every commercial truck to be inspected before each trip. This pre-trip inspection ensures the safe mechanical condition of each vehicle before it is used. An Unmanned Aerial Vehicle (UAV) could be used to provide an automated inspection, thus reducing driver workload, inspection costs and time while increasing inspection accuracy. This thesis develops a primary component of the algorithm that is

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Spivey, Christopher R. "Analysis of ride quality of tractor semi-trailers." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1181668172/.

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24

Halama, Tadeáš. "Pevnostní analýza a optimalizace nosiče výměnných nástaveb MEGA 25." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318666.

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This Diploma Thesis is dedicated to stress analysis of carrier swap bodies Mega 25 with maximum technical weight 27 000 kg and has been worked out in corporation with ZDT Nové Veselí company. The aim of this work is to stress analysis of trailer in various burdensome conditions. The first section of the Thesis is occupied with original design and burdensome condition. Then, according to these states gained strength to control the finite element method, implement and then modify the design including design of new drawbar and then create selected construction drawings prepared.

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Kucsera, Adam. "Vojenské muzeum v Králíkách - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-227001.

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This thesis is aimed at the Military Museum in Kraliky. This construction made on the basis of the initial design of the designer. For this reason, it was necessary to deal with during the processing work some technical problems, transport of materials to the construction site or purely site layout itself. The whole area of the museum consists of several buildings. The largest and main building of the exposition hall with steel supporting structures, then there is the Administration building, which in turn is a brick workshop that has as Exp hall steel structure. There is also a replica of the

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McDowell, Journey. "Comparison of Modern Controls and Reinforcement Learning for Robust Control of Autonomously Backing Up Tractor-Trailers to Loading Docks." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2100.

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Two controller performances are assessed for generalization in the path following task of autonomously backing up a tractor-trailer. Starting from random locations and orientations, paths are generated to loading docks with arbitrary pose using Dubins Curves. The combination vehicles can be varied in wheelbase, hitch length, weight distributions, and tire cornering stiffness. The closed form calculation of the gains for the Linear Quadratic Regulator (LQR) rely heavily on having an accurate model of the plant. However, real-world applications cannot expect to have an updated model for each new

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Moussoh, Amahoué François. "Simulation de l’écoulement par des approches de Mécanique des Fluides Numérique et évaluation de la dispersion de principes actifs utilisés pour traiter les plans d’eau eutrophisés." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0062.

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Ce travail se situe dans le cadre d’un projet global visant à développer un procédé innovant pour un traitement ciblé de plantes aquatiques invasives dans une masse d’eau lentique. L’un des enjeux est d’optimiser la concentration de substance active nécessaire pour éliminer les plantes ciblées sans créer de potentiels dommages écologiques. Une méthodologie basée sur une approche de modélisation ascendante a été appliquée en utilisant la Mécanique des Fluides Numérique (MFN) afin de pouvoir définir des conditions optimales pour un traitement efficace. Cette approche de modélisation a été appliq

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Zhou, Zhongkun. "Data analysis and preliminary model development for an odour detection system based on the behaviour of trained wasps." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/654.

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Microplitis croceipes, one of the nectar feeding parasitoid wasps, has been found to associatively learn chemical cues through feeding. The experiments on M. croceipes are performed and recorded by a Sony camcorder in the USDA-ARS Biological Control Laboratory in Tifton, GA, USA. The experimental videos have shown that M. croceipes can respond to Coffee odour in this study. Their detection capabilities and the behaviour of M. croceipes with different levels of coffee odours were studied. First, the data that are related to trained M. croceipes behaviour was extracted from the experimental vide

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Михеев, А. Ю., та A. Y. Mikheev. "Повышение эффективности использования подвижного состава на предприятии ООО «Жасмин» г. Михайловска : магистерская диссертация". Master's thesis, б. и, 2020. http://hdl.handle.net/10995/86597.

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The aim of the master's thesis is to develop theoretical and practical methods for increasing the efficiency of the enterprise’s vehicles and ensuring the development of the quality of operation of the operational service. The practical significance of the work lies in the application of methods and calculations to improve the efficiency of the operational and maintenance services of the enterprise LLC “Jasmine”. The introduction of the results of work at the enterprise will increase the efficiency of the use of rolling stock due to its rational use, as well as reduce material costs for transp

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Karmiadji, Djoko Wahyu. "Interaction between the tractor and trailer as a multibody system /." 1997. http://arrow.unisa.edu.au:8081/1959.8/84085.

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Kosior, Jacob Michael. "Wind driven instability of tractor-trailer combinations." 1989. http://hdl.handle.net/1993/9565.

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Bambe, Anita. "Measuring the non-pecuniary costs of triple trailer operation in Oregon : a contingent valuation approach." Thesis, 1994. http://hdl.handle.net/1957/35258.

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The purpose of this study is to measure the costs of the perceived safety threat from triple trailer operation in Oregon. This is done using the political referendum model of a common non-market valuation technique, contingent valuation. Specifically, the average cost of allowing triples will be found so that comparison with previously estimated benefits will provide a measure of net social welfare associated with triple trailer use. The data were collected through in-person interviews conducted in five regions in Oregon. Questions relating to the respondents' attitudes toward triple trailer t

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Shieh, C. F., and 謝中峰. "Lateral Dynamic analysis for tractor and trailer connected by." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/49672468366253221804.

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Kuo, Yi-Tai, and 郭奕泰. "Diaphragm Stress Analyses for Breaking System of Tractor Trailer." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/85v38d.

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碩士<br>國立虎尾科技大學<br>機械與機電工程研究所<br>101<br>As the technology industry continues to progress, coupled with the rapid economic development of any products must rely on a variety of carriers transfer, the most important is the safe delivery to the destination. So, whether land, water and maritime means of transport, relied almost exclusively on brake safety system. Early U.S. Department of Transportation (US-DOT) has long been studied for truck-related accidents, confined to formulate regulations under FMVSS 121, to avoid the 29,000 trucks related accidents, save 500 lives and prevent 25,000 injuries

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Hu, Po-I., and 胡伯義. "The Assessment of Ride Quality of a Full Tractor and Trailer." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/10126623593417567144.

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碩士<br>國立屏東技術學院<br>機械工程技術研究所<br>84<br>This thesis presents an analytical model for the evaluation of ride quality of tractor and trailer moving on an irregular road surface. The tractor and trailer bodies are assumed to be rigid and subjected to the vertical and pitch response only. The suspension systems are considered to be linear viscouslly- damped spring elements. The tires are assumed to be linear viscouslly-damped and vL elastic models respectively. The vehicle is assumed to be symm

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Dong, Yi-Chang, and 董益昌. "Sliding Mode Steering Control of a Multi-Axle Tractor and Trailer." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/17045832390268731052.

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碩士<br>國立屏東科技大學<br>機械工程系所<br>98<br>In this research, the main purpose is to study the sliding mode controller of multi-axis steering tractor and trailer. The front axle is both turned for the full tractor and trailer, while it is different with the traditional method of tractor and trailer steering. However, the full tractor and trailer are made to change by tractor and trailer quality, and moment of the inertia is changed, and they are changed under different speeds and other parameters. The vehicle’s maneuverability are affected on the analysis. First, we are derived the multi-axis steering v

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Lin, Zhen-Ping, and 林振平. "Fuzzy-Optimal Control of a Multi-Axle- Steering Tractor and Trailer." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/24354098430976566744.

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碩士<br>國立屏東科技大學<br>機械工程系所<br>98<br>The purpose of this content was studying the controller of a multi-axle-steering tractor and trailer.T-S fuzzy control proposed IF-THEN rules to describe the number of local linear equations to express the original nonlinear system. Then the weighted average defuzzification method, combining the optimal method as the feedback gain input, to control trailer front axle steering can be reached with the tractor to adjust the target active steering. Using Matlab software without changing the external dimensions of tractor and trailer under the principle. Different

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Yalin, Ray, and 雷曜嶺. "The development of Angular velocity measurement system on tractor-trailer vehicle model." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/35088451086066545532.

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碩士<br>修平科技大學<br>精密機械與製造科技研究所<br>100<br>This study discusses the angular velocity variety of tractor-trailer vehicle model by angular velocity measurement system. The angular velocity measurement system was constructed by analog gyro sensor, A/D convert and RF transmit module. Analog gyro sensor was used to sense the angular velocity of the vehicle and the analog signal was converting to digital signal by A/D convert. Digital signal can be transmitted to personal computer by a set of RF transmit module. The Visual Basic was used to program the code to process the digital signal from RF transmit

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Jiang, Borshing, and 江柏興. "Quantitative Feedback Theory Control of A Multi-Axle-Steering Tractor and Trailer." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/36336505224763215724.

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碩士<br>國立屏東科技大學<br>機械工程系<br>89<br>Abstract Hsujeng Liu Borshing Jiang In this research, the main objective is to study the controller of multi-axle-steering tractor and trailer, Insight into the influence on vehicle stability, maneuverability, in which the weight parameter of vehicle and other parameters uncertainty. Based on the four wheels steering vehicle research results and Quantitative Feedback Theory (QFT), first verify the mathematical model of the proposed articulated vehicle, and design the parameters of turning controller. Next derive the transfer function of

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Afrathim, Afthab, and 安浩宇. "Improving the Stability of the Tractor Semi-Trailer by Steering the Rear Wheels of the Tractor Unit Using an Optimal Controller." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/89v7e9.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>106<br>This thesis investigates a strategy that seeks to improve the stability of the tractor semi-trailer by controlling the rear wheels of the tractor unit to track a desired articulation angle. A linear quadratic regulator controller with tracking capability was designed in Simulink to track the desired articulation angle using tractor rear wheel steering. The performance of the controller was tested by interfacing Simulink with TruckSim, thereby allowing the use of TruckSim’s accurate vehicle model. From the simulations, it was found that by tracking the desired

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Hinton, Gretchen Marie. "Utilizing an Ultrasonic Device to Model the Lumbar Spine While Driving a Tractor Trailer." 2007. http://trace.tennessee.edu/utk_gradthes/290.

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Low back pain is a common occupational effect of the long term driving of vehicles. The sonoSens® Monitor ultrasonic device was utilized to model lumbar spinal motions while driving a tractor trailer. Further data was collected to determine if acceleration from a seat pad and EMG data correlated with the driver’s movements.Three testing bouts were completed and analyzed for this study. For each test the driver drove a 1998 Peterbuilt 379 fitted with a National Seating 2000 seat. One driver was used for all three tests.Data analysis was accomplished with the sonoSens® Analyzer and Microsoft® Ex

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Chen, Shing-Chung, and 陳興忠. "Optimum Design of System Variables for the Ride Quality of Full Tractor and Trailer." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/38409220147376117228.

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碩士<br>國立屏東技術學院<br>機械工程技術研究所<br>85<br>This thesis is to develop a program for the analysis of unconstrained optimum design problems with four design variables or less based on the orthogonal arrayof Taguchi method. The program is then applied to solve the optimum design problemsof the ride quality parameters of the full tractor and trailer. The ride qulaity parametersincluding the vertical acceleration of driver seat, suspension travel,road holding, dynamictire force and vertical accelera

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Fu-Lung, Liu, and 劉福隆. "The flow field analysis for the tractor-trailer vehicle with different types of deflector installation." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/54974381469593824694.

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碩士<br>大華技術學院<br>機電研究所<br>96<br>This study is to numerically study the flow distribution and the drag coefficient of the tractor-trailer vehicles with deflector installed. The aerodynamic effects for different type of deflectors are analyzed to obtain a better deflector design. Three CAD/CAE software including pre-processing software, PRO/ENGINEER, CFD software STAR-CD, and post-processing software FIELDVIEW, is used to perform the three-dimensional numerical computation, and the analyses are performed at the speed of 90 km/h. The results show that among the three basic types of deflector, the

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Ying, Bin. "Boundary-layer control of bluff bodies with application to drag reduction of tractor-trailer truck configurations." Thesis, 1991. http://hdl.handle.net/2429/2106.

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Effectiveness of two fundamentally different concepts of boundary-layer control for the drag reduction of bluff bodies is studied experimentally. The methods are: (i) Moving Surface Boundary-layer Control (MSBC) involving momentum injection through one or more rotating elements (light hollow cylinders); and (ii) tripping of the boundary-layer using judiciously located fences to interrupt pressure recovery. Wind tunnel tests with a two-dimensional wedge airfoil model suggest that injection of momentum can significantly delay separation of the boundary-layer resulting in a narrow wake and the a

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Huang, Muh-Tsair, and 黃木才. "The Tractor-Trailer Routing Problem of Container Transportation Companies : Application of Fuzzy Multiobjective Programming and Genetic Algorithm." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/33473782246383864578.

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碩士<br>國立交通大學<br>交通運輸研究所<br>84<br>Container transportation companies serve the transporting of containers between firms and container-yards. The routing of the tractor-trailer are dispatched by dispatcher''s experience and intuition. The scattered origins and destinations of the transport trips and the countless trips make the work of routing very difficult and burdsome. To purpose the high efficiency and reduce the cost, the companies tend to computerize. Because general container trips d

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Chen, Chien-Chih, and 陳建志. "Combine Neural Network and Response Surface Method in Control of a Multi-Axle-Steering Tractor and Trailer." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/82196957181897939674.

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碩士<br>國立屏東科技大學<br>機械工程系所<br>96<br>The purpose of this content was studying The controller of a multi-axle-steering tractor and trailer that analyzed effects of a vehicle’s roadability which aimed the vehicle’s changes at loading, high and low speedy turning and other parameters. The tractor-full trailer adopted was formed by a tractor and a trailer what both had the front axles that were able to make turning different form the way of traditional tractor-full trailer. According to the consequence of investigating a four-wheel-turning compact, deriving firstly the multi-axle-steering model, and

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Wang, Chi-Zen, and 王家仁. "A Study of Optimal Steering Angle Control for Better Maneuverability of A Multi-Axle-Steering Tractor and Trailer." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/96938525468928557861.

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碩士<br>國立屏東技術學院<br>機械工程技術研究所<br>84<br>In this research, we study the control methods of multi-axle- steering tractor and trailer, and the influence on vehicle stability, maneuverability , and ride comfort. The control of the proposed tractor and trailer with multi-steering axles is different from traditional tractor and trailer. Based on the four wheels steering vehicle research results, we first derive and verify the mathematical model of the proposed articulated vehicle, next derive the st

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Mangavelli, Harini. "Analysis of Electrical Activity of the Core Muscles Exposed to Whole-Body Vibrations While Driving a Tractor Trailer Using Electromyography device." 2007. http://trace.tennessee.edu/utk_gradthes/168.

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Lower back disorders are observed to be the most significant problem for most of the industrial workers who operate commercial vehicles. A person sitting can have 40% higher load on the lumbar spine than when standing. Human core muscles related to spinal movement respond to rapid potential motions related to external acceleration inputs of vibration in order to control body posture, the increased muscle tension can result in muscle fatigue. The over use of muscles, vibration exposure combined with dehydration of spine and long term seating can lead to lower back pain and axial discomfort to t

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Fox, Jessica. "The effect of water sprinkling market pigs transported during summer on pig behaviour, gastrointestinal tract temperature and trailer micro-climate." Thesis, 2012. http://hdl.handle.net/10214/5279.

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There has been little research into the use of water cooling methods for pigs during transport to slaughter under conditions of high ambient temperature. The aim of this study was to examine the effects of water sprinkling pigs before departure from the farm and before unloading at the plant on behaviour during transport, unloading and lairage using live and remote observations, and on pig gastrointestinal tract temperature (GTT) and trailer micro-climate measured by data loggers. Above 23oC, the use of water sprinkling tended to decrease GTT upon arrival and significantly decreased drinking b

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De, Waard Anton Hans. "Respiratory tract symptoms in multi-day trail runners - a focus on allergy." Thesis, 2012. http://hdl.handle.net/10413/6290.

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Introduction: Respiratory tract symptoms (RTS), common in athletes during heavy training and after events, result in impaired readiness for events and race times. Since the 1980’s exercise immunologists have investigated the aetiological factors surrounding the development of exercise induced RTS in order to develop effective preventative strategies. A number of theories have been put forward and explored, such as increased susceptibility to infection, ‘run-away’ inflammatory response and reactivation of prior viral infection. It has been suggested that the mechanisms producing exercise induce

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