Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Mathematical Optimisation Of The Suspension System Of An Off Road Vehicle For Ride Comfort And Handling
Download Mathematical Optimisation Of The Suspension System Of An Off Road Vehicle For Ride Comfort And Handling full books in PDF, epub, and Kindle. Read online Mathematical Optimisation Of The Suspension System Of An Off Road Vehicle For Ride Comfort And Handling ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Mathematical Optimisation of the Suspension System of an Off-road Vehicle for Ride Comfort and Handling by : Michael John Thoresson
Download or read book Mathematical Optimisation of the Suspension System of an Off-road Vehicle for Ride Comfort and Handling written by Michael John Thoresson and published by . This book was released on 2003 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Dynamics of Vehicles on Roads and Tracks by : Matthijs Klomp
Download or read book Advances in Dynamics of Vehicles on Roads and Tracks written by Matthijs Klomp and published by Springer Nature. This book was released on 2020-02-14 with total page 1917 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers together papers presented at the 26th IAVSD Symposium on Dynamics of Vehicles on Roads and Tracks, held on August 12 – 16, 2019, at the Lindholmen Conference Centre in Gothenburg, Sweden. It covers cutting-edge issues related to vehicle systems, including vehicle design, condition monitoring, wheel and rail contact, automated driving systems, suspension and ride analysis, and many more topics. Written by researchers and practitioners, the book offers a timely reference guide to the field of vehicle systems dynamics, and a source of inspiration for future research and collaborations.
Book Synopsis Efficient Gradient-based Optimisation of Suspension Characteristics for an Off-road Vehicle by : Michael John Thoresson
Download or read book Efficient Gradient-based Optimisation of Suspension Characteristics for an Off-road Vehicle written by Michael John Thoresson and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The efficient optimisation of vehicle suspension systems is of increasing interest for vehicle manufacturers. The main aim of this thesis is to develop a methodology for efficiently optimising an off-road vehicle's suspension for both ride comfort and handling, using gradient based optimisation. Good ride comfort of a vehicle traditionally requires a soft suspension setup, while good handling requires a hard suspension setup. The suspension system being optimised is a semi-active suspension system that has the ability to switch between a ride comfort and a handling setting. This optimisation is performed using the gradient-based optimisation algorithm Dynamic-Q. In order to perform the optimisation, the vehicle had to be accurately modelled in a multi-body dynamics package. This model, although very accurate, exhibited a high degree of non-linearity, resulting in a computationally expensive model that exhibited severe numerical noise. In order to perform handling optimisation, a novel closed loop driver model was developed that made use of the Magic Formula to describe the gain parameter for the single point driver model's steering gain. This non-linear gain allowed the successful implementation of a single point preview driver model for the closed loop double lane change manoeuvre, close to the vehicle's handling limit. Due to the high levels of numerical noise present in the simulation model's objective and constraint functions, the use of central finite differencing for the determination of gradient information was investigated, and found to improve the optimisation convergence history. The full simulation model, however, had to be used for the determination of this gradient information, making the optimisation process prohibitively expensive, when many design variables are considered. The use of carefully chosen simplified two-dimensional non-linear models were investigated for the determination of this gradient information. It was found that this substantially reduced the total number of expensive full simulation evaluations required, thereby speeding up the optimisation time. It was, however, found that as more design variables were considered, some variables exhibited a lower level of sensitivity than the other design variables resulting in the optimisation algorithm terminating at sub-optimal points in the design space. A novel automatic scaling procedure is proposed for scaling the design variables when Dynamic-Q is used. This scaling methodology attempts to make the n-dimensional design space more spherical in nature, ensuring the better performance of Dynamic-Q, which makes spherical approximations of the optimisation problem at each iteration step. The results of this study indicate that gradient-based mathematical optimisation methods may indeed be successfully integrated with a multibody dynamics analysis computer program for the optimisation of a vehicle's suspension system. Methods for avoiding the negative effects of numerical noise in the optimisation process have been proposed and successfully implemented, resulting in an improved methodology for gradient-based optimisation of vehicle suspension systems.
Book Synopsis Off-road Vehicle Dynamics by : Hamid Taghavifar
Download or read book Off-road Vehicle Dynamics written by Hamid Taghavifar and published by Springer. This book was released on 2016-07-27 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the analysis of off-road vehicle dynamics from kinetics and kinematics perspectives and the performance of vehicle traversing over rough and irregular terrain. The authors consider the wheel performance, soil-tire interactions and their interface, tractive performance of the vehicle, ride comfort, stability over maneuvering, transient and steady state conditions of the vehicle traversing, modeling the aforementioned aspects and optimization from energetic and vehicle mobility perspectives. This book brings novel figures for the transient dynamics and original wheel terrain dynamics at on-the-go condition.
Book Synopsis Recent Advances in Computational Mechanics and Simulations by : Sandip Kumar Saha
Download or read book Recent Advances in Computational Mechanics and Simulations written by Sandip Kumar Saha and published by Springer Nature. This book was released on 2020-11-13 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected papers from the 7th International Congress on Computational Mechanics and Simulation held at IIT Mandi, India. The papers discuss the development of mathematical models representing physical phenomena and applying modern computing methods and simulations to analyse them. The studies cover recent advances in the fields of nano mechanics and biomechanics, simulations of multiscale and multiphysics problems, developments in solid mechanics and finite element method, advancements in computational fluid dynamics and transport phenomena, and applications of computational mechanics and techniques in emerging areas. The volume will be of interest to researchers and academics from civil engineering, mechanical engineering, aerospace engineering, materials engineering/science, physics, mathematics and other disciplines.
Book Synopsis Optimization and Control of Semi-active Suspension System for Off-road Vehicles by : Ben Lahcene Zohir
Download or read book Optimization and Control of Semi-active Suspension System for Off-road Vehicles written by Ben Lahcene Zohir and published by . This book was released on 2014 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluates the dynamic response of three semi-active control policies as analyzed on a several off-road models. Two-axle 7DOF, three-axle 9DOF and four-axle 11DOF full vehicle system was developed to evaluate skyhook, groundhook, and hybrid controls. As well as exploring the relative benefits of each of these controllers, the performance of each semi-active controller was compared to the performance of conventional passive system. Each control policy is evaluated for its control performance under three different base excitations: step, bump and random. Corresponding to the bump and random inputs, peak-to-peak, RMS and frequency responses are considered for each control policy along with passive system. Specifically, sprung mass (heavy, pitch and roll acceleration), suspension and tire deflection. A comparison between different suspension systems were examined using half vehicle model and step input used to generate the time domain values of settling time and PTP acceleration for hybrid control policy and compared to fully active and passive systems using two-axle half vehicle model. Furthermore, Due to the importance of ride comfort for off-road vehicles, minimizing the peak-to-peak of the vertical, pitch and roll acceleration and reducing the settling time would lead to better ride comfort. In solving this problem, the step input was used for the optimization of a two-axle full vehicle's semi-active suspension system parameters with respect to ride comfort and handling. Genetic algorithm optimization technique is developed and used. Step input also used to generate the time domain and frequency domain responses of the four-axle full vehicle model. Reponses of sprung mass, suspension and tired deflection are obtained. Results of this study show that semi-active control offers benefits beyond those of conventional passive system. Further, traditional skyhook control is shown to be better in improving the vehicle body acceleration PTP, RMS and PSD responses. The groundhook control is shown to be better in controlling the tire deflection. Hybrid as a combination of both control policies skyhook and groundhook, shows to be better compromise in improving ride comfort and handling of the vehicle compared to passive system in all cases. Result shows also, that GA has consistently found near-optimal solutions within specified parameters ranges for several independent runs. Ride comfort improved without reducing the handling of the vehicle.
Book Synopsis Semi-active Suspension Control by : Emanuele Guglielmino
Download or read book Semi-active Suspension Control written by Emanuele Guglielmino and published by Springer Science & Business Media. This book was released on 2008-05-27 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semi-active Suspension Control provides an overview of vehicle ride control employing smart semi-active damping systems. These systems are able to tune the amount of damping in response to measured vehicle-ride and handling indicators. Two physically different dampers (magnetorheological and controlled-friction) are analysed from the perspectives of mechatronics and control. Ride comfort, road holding, road damage and human-body modelling are studied. Mathematical modelling is balanced by a large and detailed section on experimental implementation, where a variety of automotive applications are described offering a well-rounded view. The implementation of control algorithms with regard to real-life engineering constraints is emphasised. The applications described include semi-active suspensions for a saloon car, seat suspensions for vehicles not equipped with a primary suspension, and control of heavy-vehicle dynamic-tyre loads to reduce road damage and improve handling.
Book Synopsis Optimal Vehicle Suspension Characteristics for Increased Structural Fatigue Life by : Hendrik Gerhardus Abraham Breytenbach
Download or read book Optimal Vehicle Suspension Characteristics for Increased Structural Fatigue Life written by Hendrik Gerhardus Abraham Breytenbach and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The designers of heavy, off-road vehicle suspension systems face unique challenges. The ride comfort versus handling compromise in these vehicles has been frequently investigated using mathematical optimisation. Further challenges exist due to the large variations in vehicle sprung mass. The suspension system must provide adequate isolation from road load inputs throughout its payload operating range. This is imperative if good vehicle structural life is to be ensured. A passive suspension system can only provide optimal isolation at a single payload. The designer of such a suspension system must therefore make a compromise between designing for a fully-laden or unladen payload state. This work deals with suspension optimisation for vehicle structural life. The work mainly addresses two questions: 1) What are the suspension characteristics required to ensure optimal isolation of the vehicle structure from road loads? and 2) If such optimal suspension characteristics can be found, how sensitive are they to changes in vehicle payload? The study aims to answer these questions by examining a Land Rover Defender 110 as case study. An experimentally validated mathematical model of the test vehicle is constructed for the use in sensitivity studies. Mathematical optimisation is performed using the model in order to find the suspension characteristics for optimal structural life of the vehicle under consideration. Sensitivity studies are conducted to determine the robustness of the optimal characteristics and their sensitivity to vehicle payload variation. Recommendations are made for suspension characteristic selection for optimal structural life. AFRIKAANS : Ontwerpers van swaar, veldvoertuig suspensie stelsels staar unieke uitdagings in die gesig. Die ritgemak teenoor hantering kompromie in hierdie voertuie is reeds telkemale ondersoek, ook met wiskundige optimering. Verdere uitdagings bestaan as gevolg van die groot veranderinge in geveerde massa by hierdie voertuie. Die suspensiestelsel moet gepaste isolasie van pad insette oor ǹ wye reeks van bedryfstoestande lewer. Dit is veral belangrik indien daar verseker wil word dat die voertuig goeie struktuurleeftyd het. ǹ Passiewe suspensiestelsel kan egter slegs optimale isolasie by ǹ enkele vragtoestand lewer. Die ontwerper van ǹ passiewe suspensie stelsel moet dus ǹ kompromie aangaan tussen ontwerp vir ǹ vol of le ︠v︡ragtoestand. Hierdie studie handel oor suspensie optimering vir struktuur leeftyd. Die werk spreek hoofsaaklik twee vraagstukke aan: 1) Watter suspensie karakteristieke word benodig om die voertuig struktuur optimaal van padinsette te isoleer? en 2) Indien sulke optimale karakteristieke gevind kan word, wat is hulle sensitiwiteit vir veranderinge in voertuig vrag? Die studie mik om hierdie vraagstukke aan te spreek deur ondersoeke op ǹ Land Rover Defender 110 toetsvoertuig. ǹ Eksperimenteel gevalideerde, wiskundige model van die toetsvoertuig word saamgestel met die oog op sensitiwiteitstudies. Wiskundige optimering word met die model uitgevoer om sodoende die suspensie karakteristieke vir optimale struktuurleeftyd vir die betrokke toetsvoertuig te bepaal. Sensitiwiteitsanalises word gedoen om die robuustheid van die optimale karakteristieke, met betrekking tot veranderinge in voertuig vrag, vas te stel. Aanbevelings word gemaak oor die keuse van suspensie karakteristieke vir optimale struktuur leeftyd. Copyright.
Book Synopsis High Speed Off-Road Vehicles by : Bruce Maclaurin
Download or read book High Speed Off-Road Vehicles written by Bruce Maclaurin and published by John Wiley & Sons. This book was released on 2018-09-17 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concise reference that provides an overview of the design of high speed off-road vehicles High Speed Off-Road Vehicles is an excellent, in-depth review of vehicle performance in off-road conditions with a focus on key elements of the running gear systems of vehicles. In particular, elements such as suspension systems, wheels, tyres, and tracks are addressed in-depth. It is a well-written text that provides a pragmatic discussion of off-road vehicles from both a historical and analytical perspective. Some of the unique topics addressed in this book include link and flexible tracks, ride performance of tracked vehicles, and active and semi-active suspension systems for both armoured and unarmoured vehicles. The book provides spreadsheet-based analytic approaches to model these topic areas giving insight into steering, handling, and overall performance of both tracked and wheeled systems. The author further extends these analyses to soft soil scenarios and thoroughly addresses rollover situations. The text also provides some insight into more advanced articulated systems. High Speed Off-Road Vehicles: Suspensions, Tracks, Wheels and Dynamics provides valuable coverage of: Tracked and wheeled vehicles Suspension component design and characteristics, vehicle ride performance, link track component design and characteristics, flexible track, and testing of active suspension test vehicles General vehicle configurations for combat and logistic vehicles, suspension performance modelling and measurement, steering performance, and the effects of limited slip differentials on the soft soil traction and steering behavior of vehicles Written from a very practical perspective, and based on the author’s extensive experience, High Speed Off-Road Vehicles provides an excellent introduction to off-road vehicles and will be a helpful reference text for those practicing design and analysis of such systems.
Author :Mohd Fadzli Bin Abdollah Publisher :Centre for Advanced Research on Energy ISBN 13 :9672145659 Total Pages :395 pages Book Rating :4.6/5 (721 download)
Book Synopsis Proceedings of Mechanical Engineering Research Day 2019 by : Mohd Fadzli Bin Abdollah
Download or read book Proceedings of Mechanical Engineering Research Day 2019 written by Mohd Fadzli Bin Abdollah and published by Centre for Advanced Research on Energy. This book was released on 2019-08-05 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This e-book is a compilation of papers presented at the 6th Mechanical Engineering Research Day (MERD'19) - Kampus Teknologi UTeM, Melaka, Malaysia on 31 July 2019.
Book Synopsis Road and Off-Road Vehicle System Dynamics Handbook by : Gianpiero Mastinu
Download or read book Road and Off-Road Vehicle System Dynamics Handbook written by Gianpiero Mastinu and published by CRC Press. This book was released on 2014-01-06 with total page 1678 pages. Available in PDF, EPUB and Kindle. Book excerpt: Featuring contributions from industry leaders in their respective fields, this volume presents comprehensive, authoritative coverage of all the major issues involved in road vehicle dynamic behavior. It begins with a short history of road and off-road vehicle dynamics followed by thorough, detailed state-of-the-art chapters on modeling, analysis and optimization in vehicle system dynamics, vehicle concepts and aerodynamics, pneumatic tires and contact wheel-road/off-road, modeling vehicle subsystems, vehicle dynamics and active safety, man-vehicle interaction, intelligent vehicle systems, and road accident reconstruction and passive safety.
Book Synopsis Dynamic Behavior of Suspension System by : Suketu Jani
Download or read book Dynamic Behavior of Suspension System written by Suketu Jani and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: In present book 7 Degree Of Freedom mathematical models is developed for full car vehicle model and validated. Semi-active suspension system is evaluated for half car model for multi utility car, based on modified skyhook theory. Passive suspension has limitation that it has fix damping coefficient, so design of passive suspension can optimize for particular road condition. By soft damping we can get good ride comfort and better isolation of spring mass by allow large suspension deflection but it reduce handling performance due to unnecessary suspension deflection which reduce the safety. Alternatively by hard damping, it reduces unnecessary suspension deflection to improve handling performance but, reduce ride comfort due to poor isolation of spring mass. To improve ride quality and vehicle handling performance, Active Suspension System or Semi active suspension system is used. Semi Active Suspension system is used to reduce cost, weight and power consumption compare to Active Suspension System.
Book Synopsis Vehicle Suspension Systems and Electromagnetic Dampers by : Saad Kashem
Download or read book Vehicle Suspension Systems and Electromagnetic Dampers written by Saad Kashem and published by Springer. This book was released on 2017-09-04 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the development of a new analytical, full-vehicle model with nine degrees of freedom, which uses the new modified skyhook strategy (SKDT) to control the full-vehicle vibration problem. The book addresses the incorporation of road bank angle to create a zero steady-state torque requirement when designing the direct tilt control and the dynamic model of the full car model. It also highlights the potential of the SKDT suspension system to improve cornering performance and paves the way for future work on the vehicle’s integrated chassis control system. Active tilting technology to improve vehicle cornering is the focus of numerous ongoing research projects, but these don’t consider the effect of road bank angle in the control system design or in the dynamic model of the tilting standard passenger vehicles. The non-incorporation of road bank angle creates a non-zero steady state torque requirement.
Book Synopsis Industrial Safety Management by : J Maiti
Download or read book Industrial Safety Management written by J Maiti and published by Springer. This book was released on 2017-10-30 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume focuses on research conducted in the areas of industrial safety. Chapters are extensions of works presented at the International Conference on Management of Ergonomic Design, Industrial Safety and Healthcare Systems. The book addresses issues such as occupational safety, safety by design, safety analytics and safety management. It is a useful resource for students, researchers, industrial professionals and engineers.
Book Synopsis The Dynamics of Vehicles on Roads and Tracks by : Martin Rosenberger
Download or read book The Dynamics of Vehicles on Roads and Tracks written by Martin Rosenberger and published by CRC Press. This book was released on 2016-03-30 with total page 1644 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IAVSD Symposium is the leading international conference in the field of ground vehicle dynamics, bringing together scientists and engineers from academia and industry. The biennial IAVSD symposia have been held in internationally renowned locations. In 2015 the 24th Symposium of the International Association for Vehicle System Dynamics (IAVSD)
Book Synopsis 4x4 Suspension Handbook by : Trenton McGee
Download or read book 4x4 Suspension Handbook written by Trenton McGee and published by CarTech Inc. This book was released on 2007 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author Trenton McGee, 4x4 suspension expert and host of Outdoor Channels Off-Road Adventures, explains 4x4 suspension systems in an easy-to-understand manner. He gets specific on types of suspensions available from all the major manufacturers including Jeep, Toyota, Ford, Chevy, and Dodge. He goes into a great level of detail on every different model, including early and modern model systems.
Book Synopsis Intelligent Control System for Active Suspension for Off-road Vehicles by : Omar A.O. Sabaneh
Download or read book Intelligent Control System for Active Suspension for Off-road Vehicles written by Omar A.O. Sabaneh and published by . This book was released on 2015 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the passive suspension system is not enough for creating good compromise between the road handling and ride comfort for off-road vehicles, this thesis presents a study on the application of an active suspension system. The system is considered under the Neuro-Fuzzy controller (NFC) for two and three-axle half-car off-road vehicle models. In this work, two methods are studied and employed as benchmarks for the NFC. The two methods are fuzzy logic control (FLC) method and neural networks control (NNC) method based on NARMA-L2 neurocontroller. The system designed for this study takes in two types of road disturbances as inputs, namely pothole and random road inputs. The sprung mass vertical and pitch accelerations are the criteria employed for the evaluation of the ride comfort, while the tire deflection is used for the road handling. The work's results demonstrates that, the NFC has a superior performance over the FLC and the NNC in terms of the ride comfort without compromising the rattle-space requirement, since the NFC improved the vertical acceleration of the sprung masses of the two-axle and three axle vehicle models for both the pitch and the random road disturbances more than the NNC and the FLC. On the other hand, the NFC requires higher control effort than the FLC and NNC as it gives the best performance that requires more control effort. The results are compared as well with the responses of the passive suspension system.
