Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Relative Performance Analyses Of Articulated Vehicles With Multiple Conventional Liftable And Self Steering Axles
Download Relative Performance Analyses Of Articulated Vehicles With Multiple Conventional Liftable And Self Steering Axles full books in PDF, epub, and Kindle. Read online Relative Performance Analyses Of Articulated Vehicles With Multiple Conventional Liftable And Self Steering Axles ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Relative Performance Analyses of Articulated Vehicles with Multiple Conventional, Liftable and Self-steering Axles by : Sheng Luo
Download or read book Relative Performance Analyses of Articulated Vehicles with Multiple Conventional, Liftable and Self-steering Axles written by Sheng Luo and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Directional Dynamic Analysis of an Articulated Vehicle with Articulation Dampers and Forced-steering by : Rama Krishna Vallurupalli
Download or read book Directional Dynamic Analysis of an Articulated Vehicle with Articulation Dampers and Forced-steering written by Rama Krishna Vallurupalli and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Analysis and Recommended Practice for the Double-drawbar Dolly Using Self-steering Axles by : Moustafa El-Gindy
Download or read book Technical Analysis and Recommended Practice for the Double-drawbar Dolly Using Self-steering Axles written by Moustafa El-Gindy and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The tractor/double-trailer vehicle combination known as the c-train is distinguished primarily by the double drawbar dolly connecting the two trailers. this use of this c-dolly eliminates one point of articulation, which has a positive effect of vehicle performance. the self steering axle used by the c-dolly is the focus of most of the remaining concern regarding the c-train and its performance. this report examines the c-train and the c-dolly and its component parts with a view to identifying what performance regulations would be appropriate for encouraging a balanced development of the c-train within the context of interprovincial transportation. a detailed theoretical analysis is presented on the mechanics of self steering axles and their effect on vehicle handling. this analysis is complemented by a practical analysis based on past experience, the effects of design change, and records of satisfactory and non-satisfactory experience. finally, the study presents a set of recommended regulations and outlines a test procedure to prove compliance with the regulations.
Book Synopsis Ride and Directional Dynamic Analysis of Articulated Frame Steer Vehicles by : Alireza Pazooki
Download or read book Ride and Directional Dynamic Analysis of Articulated Frame Steer Vehicles written by Alireza Pazooki and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multi-axle Vehicle Modeling and Stability Control by : Yubiao Zhang
Download or read book Multi-axle Vehicle Modeling and Stability Control written by Yubiao Zhang and published by . This book was released on 2019 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-axle vehicles, such as trucks and buses, have been playing a vital role in trucking industry, public transportation system, and long-distance transport services. However, at the same time, statistics suggest more than one million lives are lost in road accidents each year over the world. The high adoption and utilization of multi-axle vehicles hold a significant portion of road accidents and death. To improve the active safety of vehicles, active systems have been developed and commercialized over the last decades to augment the driver's actions. However, unlike two-axle vehicles (e.g., passenger cars), multi-axle vehicles come in a rich diversity and variety to meet with many different transportation needs. Specifically, vehicle configurations are seen in different numbers of axles, numbers of articulations, powertrain modes, and active actuation systems. In addition, multi-axle vehicles are usually articulated, which makes the dynamics and control more complex and challenging as more instability modes appear, such as, trailer sway and jackknife. This research is hence motivated by an essential question: how can a universal and reconfigurable control system be developed for any multi-axle/articulated vehicle with any configuration? Leveraging the matrix approach and optimization-based techniques, this thesis developed a reconfigurable and universal modeling and control framework to this aim. Specifically, a general dynamics modeling that unifies any multi-axle and articulated vehicles in one formulation is developed in an intuitive manner. It defines the `Boolean Matrices' to determine any configuration of the articulation, the number of axles, and the active actuation systems. In this way, the corresponding dynamics model can be easily and quickly formulated when axles, articulations or actuators are added or removed. The general modeling serves to achieve the universality and reconfigurability in controller design. Therefore, a hierarchical, i.e., two-layer, control system is proposed. In the high layer, the optimization process of a model predictive control (MPC) calculates corrective Center of Gravity (CG) forces/moments, which are universal to any vehicle. The lower-level controller is achieved by a Control Allocation (CA) algorithm. It aims to realize the MPC commands by regulating the steering or torque (driving or braking) at each wheel optimally. In addition, the optimization takes into account real-time constraints, such as actuator limits, tire capacity, wheel slips, and actuators failure. Simulations are conducted on different vehicle configurations to evaluate control performance, reconfigurability, and robustness of the system. Additionally, to evaluate the real-time performance of the developed controller, experimental validation is carried out on an articulated vehicle with multiple configurations of differential braking systems. It is observed that the controller is very effective in dynamics control and has a promising reconfigurability when moving from one configuration to another.
Book Synopsis Enhancement of Ride and Directional Performances of Articulated Vehicles Via Optimal Frame Steering and Hydro-Pneumatic Suspension by : Yuming Yin
Download or read book Enhancement of Ride and Directional Performances of Articulated Vehicles Via Optimal Frame Steering and Hydro-Pneumatic Suspension written by Yuming Yin and published by . This book was released on 2018 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Off-road vehicles employed in agriculture, construction, forestry and mining sectors are known to exhibit comprehensive levels of terrain-induced ride vibration and relatively lower directional stability limits, especially for the articulated frame-steered vehicles (AFSV). The transmitted whole-body vibration (WBV) exposure levels to the human operators generally exceed the safety limits defined in ISO-2631-1 and the European Community guidelines. Moreover, the directional stability limits are generally assessed neglecting the contributions due to terrain roughness and kineto-dynamics of the articulated frame steering (AFS) system. Increasing demand for high load capacity and high-speed off-road vehicles raises greater concerns for both the directional stability limits and WBV exposure. The criterion for acceptable handling and stability limits of such vehicles do not yet exist and need to be established. Furthermore, both directional stability performance and ride vibration characteristics are coupled and pose conflicting vehicle suspension design requirements. This dissertation research focuses on enhancement of ride, and roll- and yaw-plane stability performance measures of frame-steered vehicle via analysis of kineto-dynamics of the AFS system and hydro-pneumatic suspensions. A roll stability performance measure is initially proposed for off-road vehicles considering magnitude and spectral contents of the terrain elevations. The roll dynamics of an off-road vehicle operating on random rough terrains were investigated, where the two terrain-track profiles were synthesized considering coherency between them. It is shown that a measure based on steady-turning root-mean-square lateral acceleration corresponding to the sustained period of unity lateral-load-transfer-ratio prior to the absolute-rollover, could serve as a reliable measure of roll stability of vehicles operating on random rough terrains. The simulation results revealed adverse effects of terrain elevation magnitude on the roll stability, while a relatively higher coherency resulted in lower terrain roll-excitation and thereby higher roll stability. The yaw-plane stability limits of an AFSV are investigated in terms of free yaw-oscillations as well as transient steering characteristics through field measurements and simulations of kineto-dynamics of the AFS system. It was shown that employing hydraulic fluid with higher bulk modulus and increasing the steering arm lengths would yield higher yaw stiffness of the AFS system and thereby higher frequency of yaw-oscillations. Greater leakage flows and viscous seal friction within the AFS system struts caused higher yaw damping coefficient but worsened the steering gain and articulation rate. A design guidance of the AFS system is subsequently proposed. The essential objective measures are further identified considering the AFSV's yaw oscillation/stability and steering performances, so as to seek an optimal design of the AFS system. For enhancing the ride performance of AFSV, a simple and low cost design of a hydro-pneumatic suspension (HPS) is proposed. The nonlinear stiffness and damping properties of the HPS strut that permits entrapment of gas into the hydraulic oil were characterized experimentally and analytically. The formation of the gas-oil emulsion was studied in the laboratory, and variations in the bulk modulus and mass density of the emulsion were formulated as a function of the gas volume fraction. The model results obtained under different excitations in the 0.1 to 8 Hz frequency range showed reasonably good agreements with the measured stiffness and damping properties of the HPS strut. The results showed that increasing the fluid compressibility causes increase in effective stiffness but considerable reduction in the damping in a highly nonlinear manner. Increasing the gas volume fraction resulted in substantial hysteresis in the force-deflection and force-velocity characteristics of the strut. A three-dimensional AFSV model is subsequently formulated integrating the hydro-mechanical AFS system and a hydro-pneumatic suspension. The HPS is implemented only at the front axle, which supports the driver cabin in order to preserve the roll stability of the vehicle. The validity of the model is illustrated through field measurements on a prototype vehicle. The suspension parameters are selected through design sensitivity analyses and optimization, considering integrated ride vibration, and roll- and yaw-plane stability performance measures. The results suggested that implementation of HPS to the front unit alone could help preserve the directional stability limits compared to the unsuspended prototype vehicle and reduce the ride vibration exposure by nearly 30%. The results of sensitivity analyses revealed that the directional stability performance limits are only slightly affected by the HPS parameters. Further reduction in the ride vibration exposure was attained with the optimal design, irrespective of the payload variations.
Download or read book Paper written by and published by . This book was released on 1979 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on 1979 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cumulative Index [of The] SAE Papers by : Society of Automotive Engineers
Download or read book Cumulative Index [of The] SAE Papers written by Society of Automotive Engineers and published by . This book was released on 1965 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ITF Research Reports Moving Freight with Better Trucks Improving Safety, Productivity and Sustainability by : OECD
Download or read book ITF Research Reports Moving Freight with Better Trucks Improving Safety, Productivity and Sustainability written by OECD and published by OECD Publishing. This book was released on 2011-04-19 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report identifies potential improvements in terms of more effective safety and environmental regulation for trucks, backed by better systems of enforcement, and identifies opportunities for greater efficiency and higher productivity.
Book Synopsis Hydropneumatic Suspension Systems by : Wolfgang Bauer
Download or read book Hydropneumatic Suspension Systems written by Wolfgang Bauer and published by Springer Nature. This book was released on 2021-09-30 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydropneumatic suspension systems combine the excellent properties of gas springs with the favourable damping properties of hydraulic fluids. The advantages of these systems are particularly appropriate for mobile applications, such as agricultural and construction equipment as well as passenger cars, trucks and busses. Based on his 20 years of experience with this technology, Dr. Bauer provides in this book an extensive overview of hydropneumatic suspension systems. Starting with a comparison of different types of suspension systems, the author subsequently describes the theoretical background associated with spring and damping characteristics of hydropneumatic systems. Furthermore, he explains the design of the most important system components and gives an overview of level control systems, various special functions, patents and design examples. Finally, an outlook for future hydropneumatic suspension systems is discussed. Compared to the first edition, this new edition puts an additional focus on damping functions as well as applications / projects and contains various additional details such as proportional valves, all-wheel suspension or dediated power supply. Furthermore, suspension testing has been added as a new chapter.
Book Synopsis Track Design Handbook for Light Rail Transit by :
Download or read book Track Design Handbook for Light Rail Transit written by and published by Transportation Research Board. This book was released on 2012 with total page 695 pages. Available in PDF, EPUB and Kindle. Book excerpt: TCRP report 155 provides guidelines and descriptions for the design of various common types of light rail transit (LRT) track. The track structure types include ballasted track, direct fixation ("ballastless") track, and embedded track. The report considers the characteristics and interfaces of vehicle wheels and rail, tracks and wheel gauges, rail sections, alignments, speeds, and track moduli. The report includes chapters on vehicles, alignment, track structures, track components, special track work, aerial structures/bridges, corrosion control, noise and vibration, signals, traction power, and the integration of LRT track into urban streets.
Book Synopsis Suspension Geometry and Computation by : John C. Dixon
Download or read book Suspension Geometry and Computation written by John C. Dixon and published by John Wiley & Sons. This book was released on 2009-10-27 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revealing suspension geometry design methods in unique detail, John Dixon shows how suspension properties such as bump steer, roll steer, bump camber, compliance steer and roll centres are analysed and controlled by the professional engineer. He emphasizes the physical understanding of suspension parameters in three dimensions and methods of their calculation, using examples, programs and discussion of computational problems. The analytical and design approach taken is a combination of qualitative explanation, for physical understanding, with algebraic analysis of linear and non-linear coefficients, and detailed discussion of computer simulations and related programming methods. Includes a detailed and comprehensive history of suspension and steering system design, fully illustrated with a wealth of diagrams Explains suspension characteristics and suspension geometry coefficients, providing a unique and in-depth understanding of suspension design not found elsewhere. Describes how to obtain desired coefficients and the limitations of particular suspension types, with essential information for suspension designers, chassis technicians and anyone else with an interest in suspension characteristics and vehicle dynamics. Discusses the use of computers in suspension geometry analysis, with programming techniques and examples of suspension solution, including advanced discussion of three-dimensional computational geometry applied to suspension design. Explains in detail the direct and iterative solutions of suspension geometry.
Book Synopsis Analysis and Design of Automotive Brake Systems by : United States. Army Materiel Development and Readiness Command
Download or read book Analysis and Design of Automotive Brake Systems written by United States. Army Materiel Development and Readiness Command and published by . This book was released on 1976 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Research Council (U.S.). Committee for the Truck Weight Study Publisher :Transportation Research Board ISBN 13 :9780309049559 Total Pages :322 pages Book Rating :4.0/5 (495 download)
Book Synopsis Truck Weight Limits by : National Research Council (U.S.). Committee for the Truck Weight Study
Download or read book Truck Weight Limits written by National Research Council (U.S.). Committee for the Truck Weight Study and published by Transportation Research Board. This book was released on 1990 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: To help assess proposals for further changes in federal truck weight limits, Congress requested this study through Section 158 of the Surface Transportation and Uniform Relocation Assistance Act of 1987. To conduct the study, the National Research Council convened a special Transportation Research Board committee with experts in pavements, bridges, highway safety, freight transportation economics, motor vehicle design, highway administration, motor carrier operations, and enforcement of motor vehicle regulations. The study focused on four issues identified in the study request that involve potential changes to federal weight limits for Interstate highways: (1) Elimination of existing grandfather provisions; (2) Alternative methods for determining gross vehicle weight and axle loadings; (3) Adequacy of the current federal bridge formula; and (4) Treatment of specialized hauling vehicles--garbage trucks, dump trucks, and other trucks with short wheel bases that have difficulty complying with the current federal bridge formula. For each of these issues, the study committee estimated the nationwide effects of changes in federal limits proposed by the trucking industry, highway agencies, and other groups. Projections of heavy-truck miles by type of truck, region of the country, highway functional class, and operating weight were developed for a base case and alternative truck weight regulatory scenarios. These projections were then used to estimate impacts on truck costs, pavements, bridges, and safety.
Book Synopsis Strengthening Forensic Science in the United States by : National Research Council
Download or read book Strengthening Forensic Science in the United States written by National Research Council and published by National Academies Press. This book was released on 2009-07-29 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scores of talented and dedicated people serve the forensic science community, performing vitally important work. However, they are often constrained by lack of adequate resources, sound policies, and national support. It is clear that change and advancements, both systematic and scientific, are needed in a number of forensic science disciplines to ensure the reliability of work, establish enforceable standards, and promote best practices with consistent application. Strengthening Forensic Science in the United States: A Path Forward provides a detailed plan for addressing these needs and suggests the creation of a new government entity, the National Institute of Forensic Science, to establish and enforce standards within the forensic science community. The benefits of improving and regulating the forensic science disciplines are clear: assisting law enforcement officials, enhancing homeland security, and reducing the risk of wrongful conviction and exoneration. Strengthening Forensic Science in the United States gives a full account of what is needed to advance the forensic science disciplines, including upgrading of systems and organizational structures, better training, widespread adoption of uniform and enforceable best practices, and mandatory certification and accreditation programs. While this book provides an essential call-to-action for congress and policy makers, it also serves as a vital tool for law enforcement agencies, criminal prosecutors and attorneys, and forensic science educators.
Book Synopsis System Dynamics and Long-Term Behaviour of Railway Vehicles, Track and Subgrade by : Karl Popp
Download or read book System Dynamics and Long-Term Behaviour of Railway Vehicles, Track and Subgrade written by Karl Popp and published by Springer Science & Business Media. This book was released on 2013-06-06 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decades completely new technologies for high speed railway vehicles have been developed. The primary goals have been to increase traction, axle load, and travelling speed, and to guarantee the safety of the passengers. However, new developments have revealed new limitations: settlement and destruction of the ballast and the subgrade lead to deterioration of the track; irregular wear of the wheels causes an increase in overall load and deterioration in passenger comfort; and damage of the running surfaces of the rail and the wheel is becoming more frequent. These problems have been investigated in the Priority Programme SPP 1015 supported by the Deutsche Forschungsgemeinschaft (DFG), with the goal of better understanding of the dynamic interaction of vehicle and track, and the long-term behavior of the components of the system. The book contains the scientific results of the programme as presented at the concluding colloquium held at University of Stuttgart, Germany, 2002.
![Download Cumulative Index [of The] SAE Papers PDF Online Free](https://books.google.com/books/content/images/frontcover/mmIcAQAAMAAJ?fife=w200-h370)
