Methods for Obtaining Improvements to the Steady-State, Pure Side-Slip Pacejka Tire Model in Capturing Conventional and Unconventional Tire Behavior
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RELATIONSHIPS BETWEEN LANE CHANGE PERFORMANCE and OPEN- LOOP HANDLING METRICS Robert Powell Clemson University, [email protected]
Clemson University TigerPrints All Theses Theses 1-1-2009 RELATIONSHIPS BETWEEN LANE CHANGE PERFORMANCE AND OPEN- LOOP HANDLING METRICS Robert Powell Clemson University, [email protected] Follow this and additional works at: http://tigerprints.clemson.edu/all_theses Part of the Engineering Mechanics Commons Please take our one minute survey! Recommended Citation Powell, Robert, "RELATIONSHIPS BETWEEN LANE CHANGE PERFORMANCE AND OPEN-LOOP HANDLING METRICS" (2009). All Theses. Paper 743. This Thesis is brought to you for free and open access by the Theses at TigerPrints. It has been accepted for inclusion in All Theses by an authorized administrator of TigerPrints. For more information, please contact [email protected]. RELATIONSHIPS BETWEEN LANE CHANGE PERFORMANCE AND OPEN-LOOP HANDLING METRICS A Thesis Presented to the Graduate School of Clemson University In Partial Fulfillment of the Requirements for the Degree Master of Science Mechanical Engineering by Robert A. Powell December 2009 Accepted by: Dr. E. Harry Law, Committee Co-Chair Dr. Beshahwired Ayalew, Committee Co-Chair Dr. John Ziegert Abstract This work deals with the question of relating open-loop handling metrics to driver- in-the-loop performance (closed-loop). The goal is to allow manufacturers to reduce cost and time associated with vehicle handling development. A vehicle model was built in the CarSim environment using kinematics and compliance, geometrical, and flat track tire data. This model was then compared and validated to testing done at Michelin’s Laurens Proving Grounds using open-loop handling metrics. The open-loop tests conducted for model vali- dation were an understeer test and swept sine or random steer test. -
The Effect of Tyre Inflation Pressure on Fuel Consumption and Vehicle Handling Performance a Case of ANBESSA CITY BUS
ADAMA SCIENCE AND TECHNOLOGY UNIVERSITY SCHOOL OF MECHANICAL, CHEMICAL AND MATERIALS ENGINEERING The Effect of Tyre Inflation Pressure on Fuel Consumption and vehicle Handling Performance a case of ANBESSA CITY BUS A thesis submitted in partial fulfillment of the requirements for the award of the Degree of Master of Science in Automotive Engineering By NIGATU BELAYNEH USAMO ADVISOR: - N. RAMESH BABU (Associate Professor) MECHANICAL SYSTEMS AND VEHICLE ENGINEERING PROGRAM June-2017 Adama-Ethiopia I CANDIDATE'S DECLARATION I hereby declare that the work which is being presented in the thesis titled ―The Effect of Tyre Inflation Pressure on Fuel Consumption and vehicle Handling Performance a case of ANBESSA CITY BUS‖ in partial fulfillment of the requirements for the award of the degree of Master of Science in Automotive Engineering is an authentic record of my own work carried out from October 2016 to up June 2017, under the supervision of N. RAMESH BABU Department of Mechanical and Vehicle Engineering, Adama Science and Technology University, Ethiopia. The matter embodied in this thesis has not been submitted by me for the award of any other degree or diploma. All relevant resources of information used in this thesis have been duly acknowledged. Name Signature Date Nigatu Belayneh ………………… …………… Student This is to certify that the above statement made by the candidate is correct to the best of my knowledge and belief. This thesis has been submitted for examination with my approval. Name Signature Date N. Ramesh Babu ______________ ________________ -
Automotive Engineering II Lateral Vehicle Dynamics
INSTITUT FÜR KRAFTFAHRWESEN AACHEN Univ.-Prof. Dr.-Ing. Henning Wallentowitz Henning Wallentowitz Automotive Engineering II Lateral Vehicle Dynamics Steering Axle Design Editor Prof. Dr.-Ing. Henning Wallentowitz InstitutFürKraftfahrwesen Aachen (ika) RWTH Aachen Steinbachstraße7,D-52074 Aachen - Germany Telephone (0241) 80-25 600 Fax (0241) 80 22-147 e-mail [email protected] internet htto://www.ika.rwth-aachen.de Editorial Staff Dipl.-Ing. Florian Fuhr Dipl.-Ing. Ingo Albers Telephone (0241) 80-25 646, 80-25 612 4th Edition, Aachen, February 2004 Printed by VervielfältigungsstellederHochschule Reproduction, photocopying and electronic processing or translation is prohibited c ika 5zb0499.cdr-pdf Contents 1 Contents 2 Lateral Dynamics (Driving Stability) .................................................................................4 2.1 Demands on Vehicle Behavior ...................................................................................4 2.2 Tires ...........................................................................................................................7 2.2.1 Demands on Tires ..................................................................................................7 2.2.2 Tire Design .............................................................................................................8 2.2.2.1 Bias Ply Tires.................................................................................................11 2.2.2.2 Radial Tires ...................................................................................................12 -
Final Report
Final Report Reinventing the Wheel Formula SAE Student Chapter California Polytechnic State University, San Luis Obispo 2018 Patrick Kragen [email protected] Ahmed Shorab [email protected] Adam Menashe [email protected] Esther Unti [email protected] CONTENTS Introduction ................................................................................................................................ 1 Background – Tire Choice .......................................................................................................... 1 Tire Grip ................................................................................................................................. 1 Mass and Inertia ..................................................................................................................... 3 Transient Response ............................................................................................................... 4 Requirements – Tire Choice ....................................................................................................... 4 Performance ........................................................................................................................... 5 Cost ........................................................................................................................................ 5 Operating Temperature .......................................................................................................... 6 Tire Evaluation .......................................................................................................................... -
Tire Building Drum Having Independently Expandable Center and End Sections
Europäisches Patentamt *EP001295702A2* (19) European Patent Office Office européen des brevets (11) EP 1 295 702 A2 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: (51) Int Cl.7: B29D 30/24, B29D 30/20 26.03.2003 Bulletin 2003/13 (21) Application number: 02021255.1 (22) Date of filing: 19.09.2002 (84) Designated Contracting States: (72) Inventors: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR • Currie, William Dudley IE IT LI LU MC NL PT SE SK TR Stow, Ohio 44224 (US) Designated Extension States: • Reding, Emile AL LT LV MK RO SI 9163 Kehmen (LU) • Roedseth, John Kolbjoern (30) Priority: 21.09.2001 US 960211 7790 Bissen (LU) (71) Applicant: THE GOODYEAR TIRE & RUBBER (74) Representative: Leitz, Paul COMPANY Goodyear S.A., Akron, Ohio 44316-0001 (US) Patent-Department 7750 Colmar-Berg (LU) (54) Tire building drum having independently expandable center and end sections (57) A tire building drum has a center section (720) therebetween. In an embodiment of the invention, the and two end sections (722, 724). Each end section is bead lock assembly comprises a cylinder and two pis- provided with an expandable bead lock assembly (726). tons (P1, P2) disposed within the cylinder. The pistons The center section is preferably expandable. The ex- are free to move axially within the cylinder, in response pandable bead lock assembly comprises a carrier ring to pneumatic pressure. The first piston (P1) is con- (CR) and a plurality of elongate links (K) extending be- strained from moving axially inward by rods (R1P1, tween the carrier ring (CR) and a plurality of radially- R2P1, R3P1). -
Nonlinear Finite Element Modeling and Analysis of a Truck Tire
The Pennsylvania State University The Graduate School Intercollege Graduate Program in Materials NONLINEAR FINITE ELEMENT MODELING AND ANALYSIS OF A TRUCK TIRE A Thesis in Materials by Seokyong Chae © 2006 Seokyong Chae Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy August 2006 The thesis of Seokyong Chae was reviewed and approved* by the following: Moustafa El-Gindy Senior Research Associate, Applied Research Laboratory Thesis Co-Advisor Co-Chair of Committee James P. Runt Professor of Materials Science and Engineering Thesis Co-Advisor Co-Chair of Committee Co-Chair of the Intercollege Graduate Program in Materials Charles E. Bakis Professor of Engineering Science and Mechanics Ashok D. Belegundu Professor of Mechanical Engineering *Signatures are on file in the Graduate School. iii ABSTRACT For an efficient full vehicle model simulation, a multi-body system (MBS) simulation is frequently adopted. By conducting the MBS simulations, the dynamic and steady-state responses of the sprung mass can be shortly predicted when the vehicle runs on an irregular road surface such as step curb or pothole. A multi-body vehicle model consists of a sprung mass, simplified tire models, and suspension system to connect them. For the simplified tire model, a rigid ring tire model is mostly used due to its efficiency. The rigid ring tire model consists of a rigid ring representing the tread and the belt, elastic sidewalls, and rigid rim. Several in-plane and out-of-plane parameters need to be determined through tire tests to represent a real pneumatic tire. Physical tire tests are costly and difficult in operations. -
Study on the Stability Control of Vehicle Tire Blowout Based on Run-Flat Tire
Article Study on the Stability Control of Vehicle Tire Blowout Based on Run-Flat Tire Xingyu Wang 1 , Liguo Zang 1,*, Zhi Wang 1, Fen Lin 2 and Zhendong Zhao 1 1 Nanjing Institute of Technology, School of Automobile and Rail Transportation, Nanjing 211167, China; [email protected] (X.W.); [email protected] (Z.W.); [email protected] (Z.Z.) 2 College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; fl[email protected] * Correspondence: [email protected] Abstract: In order to study the stability of a vehicle with inserts supporting run-flat tires after blowout, a run-flat tire model suitable for the conditions of a blowout tire was established. The unsteady nonlinear tire foundation model was constructed using Simulink, and the model was modified according to the discrete curve of tire mechanical properties under steady conditions. The improved tire blowout model was imported into the Carsim vehicle model to complete the construction of the co-simulation platform. CarSim was used to simulate the tire blowout of front and rear wheels under straight driving condition, and the control strategy of differential braking was adopted. The results show that the improved run-flat tire model can be applied to tire blowout simulation, and the performance of inserts supporting run-flat tires is superior to that of normal tires after tire blowout. This study has reference significance for run-flat tire performance optimization. Keywords: run-flat tire; tire blowout; nonlinear; modified model Citation: Wang, X.; Zang, L.; Wang, Z.; Lin, F.; Zhao, Z. -
Tire Manual.Pdf
Revision Highlights The FedEx Tire Manual has content changes including the following: Chapter 1: Purchasing Jun 2008 1-10: Added Q & A FILING WARRANTY ON TIRES NOT MOUNTED Chapter 2: Warranty Chapter 3: Tire Applications Jun 2008 3-10: Updated Product Codes and Drive Tire Design 3-15: Added Toyota Specs to Cargo Tractors Chapter 4: Maintenance . Chapter 5: Shop Administration . Contents ii Contents Publication Information ........................................................................................................................ vi Chapter 1: Purchasing .......................................................................................................................... 1 1-5: Tire Ordering Process ....................................................................................................................................... 2 Filing Claims – Tires Lost in Shipment ........................................................................................................ 2 Contact Numbers and Procedures .............................................................................................................. 4 1-10: Frequently Asked Questions - Goodyear Tires ............................................................................................... 5 Double Shipment on Tires ........................................................................................................................... 5 Ordered Wrong or Wrong Tires Shipped ................................................................................................... -
Influência Da Estrutura Ímpar Em Pneus De Lonas Cruzadas
Igor Zucato Influência da estrutura ímpar em pneus de lonas cruzadas (“Cross-Ply”) São Paulo 2006 Livros Grátis http://www.livrosgratis.com.br Milhares de livros grátis para download. Igor Zucato Influência da estrutura ímpar em pneus de lonas cruzadas (“Cross-Ply”) Dissertação apresentada à Escola Politécnica da Universidade de São Paulo para obtenção do título de Mestre em Engenharia Mecânica. Orientador: Prof. Dr. Marco Stipkovic Fº. São Paulo 2006 II Folha de Aprovação Igor Zucato Influência da estrutura ímpar em pneus lonas cruzadas (“Cross-Ply”) Dissertação apresentada à Escola Politécnica da Universidade de São Paulo para obtenção do título de Mestre em Engenharia Mecânica. Aprovado em: 21 de novembro de 2006 Banca Examinadora Prof. Dr. Marco Stipkovic Filho Instituição: EP – USP Assinatura :__________________ Prof. Dr. Gilberto Francisco Martha de Souza Instituição: EP – USP Assinatura :__________________ Prof. Dr. Renato Barbieri Instituição: PUC – PR (externo) Assinatura :__________________ III "Nosso maior desejo na vida é encontrar alguém que nos faça fazer o melhor que pudermos." Ralph Waldo Emerson Fabiana, obrigado minha esposa e companheira, com todo o amor de minha vida. IV Agradecimentos Primeiramente ao meu amigo e por acaso meu chefe, Eduardo Pinheiro, que me incentivou e apostou no desenvolvimento desse trabalho com suas sugestões e opiniões, bem como no desenvolvimento desta pós-graduação. Ao meu orientador e amigo que teve a paciência para suportar, guiar e me ajudar durante essa caminhada. À Pirelli Pneus S.A. pelo apoio e oportunidade de desenvolver e publicar este trabalho que reúne uma parte da minha experiência na área de pesquisa e desenvolvimento de pneus, e pelo suporte do R&D. -
Rolling Resistance During Cornering - Impact of Lateral Forces for Heavy- Duty Vehicles
DEGREE PROJECT IN MASTER;S PROGRAMME, APPLIED AND COMPUTATIONAL MATHEMATICS 120 CREDITS, SECOND CYCLE STOCKHOLM, SWEDEN 2015 Rolling resistance during cornering - impact of lateral forces for heavy- duty vehicles HELENA OLOFSON KTH ROYAL INSTITUTE OF TECHNOLOGY SCHOOL OF ENGINEERING SCIENCES Rolling resistance during cornering - impact of lateral forces for heavy-duty vehicles HELENA OLOFSON Master’s Thesis in Optimization and Systems Theory (30 ECTS credits) Master's Programme, Applied and Computational Mathematics (120 credits) Royal Institute of Technology year 2015 Supervisor at Scania AB: Anders Jensen Supervisor at KTH was Xiaoming Hu Examiner was Xiaoming Hu TRITA-MAT-E 2015:82 ISRN-KTH/MAT/E--15/82--SE Royal Institute of Technology SCI School of Engineering Sciences KTH SCI SE-100 44 Stockholm, Sweden URL: www.kth.se/sci iii Abstract We consider first the single-track bicycle model and state relations between the tires’ lateral forces and the turning radius. From the tire model, a relation between the lateral forces and slip angles is obtained. The extra rolling resis- tance forces from cornering are by linear approximation obtained as a function of the slip angles. The bicycle model is validated against the Magic-formula tire model from Adams. The bicycle model is then applied on an optimization problem, where the optimal velocity for a track for some given test cases is determined such that the energy loss is as small as possible. Results are presented for how much fuel it is possible to save by driving with optimal velocity compared to fixed average velocity. The optimization problem is applied to a specific laden truck. -
Program & Abstracts
39th Annual Business Meeting and Conference on Tire Science and Technology Intelligent Transportation Program and Abstracts September 28th – October 2nd, 2020 Thank you to our sponsors! Platinum ZR-Rated Sponsor Gold V-Rated Sponsor Silver H-Rated Sponsor Bronze T-Rated Sponsor Bronze T-Rated Sponsor Media Partners 39th Annual Meeting and Conference on Tire Science and Technology Day 1 – Monday, September 28, 2020 All sessions take place virtually Gerald Potts 8:00 AM Conference Opening President of the Society 8:15 AM Keynote Speaker Intelligent Transportation - Smart Mobility Solutions Chris Helsel, Chief Technical Officer from the Tire Industry Goodyear Tire & Rubber Company Session 1: Simulations and Data Science Tim Davis, Goodyear Tire & Rubber 9:30 AM 1.1 Voxel-based Finite Element Modeling Arnav Sanyal to Predict Tread Stiffness Variation Around Tire Circumference Cooper Tire & Rubber Company 9:55 AM 1.2 Tire Curing Process Analysis Gabriel Geyne through SIGMASOFT Virtual Molding 3dsigma 10:20 AM 1.3 Off-the-Road Tire Performance Evaluation Biswanath Nandi Using High Fidelity Simulations Dassault Systems SIMULIA Corp 10:40 AM Break 10:55 AM 1.4 A Study on Tire Ride Performance Yaswanth Siramdasu using Flexible Ring Models Generated by Virtual Methods Hankook Tire Co. Ltd. 11:20 AM 1.5 Data-Driven Multiscale Science for Tire Compounding Craig Burkhart Goodyear Tire & Rubber Company 11:45 AM 1.6 Development of Geometrically Accurate Finite Element Tire Models Emanuele Grossi for Virtual Prototyping and Durability Investigations Exponent Day 2 – Tuesday, September 29, 2020 8:15 AM Plenary Lecture Giorgio Rizzoni, Director Enhancing Vehicle Fuel Economy through Connectivity and Center for Automotive Research Automation – the NEXTCAR Program The Ohio State University Session 1: Tire Performance Eric Pierce, Smithers 9:30 AM 2.1 Periodic Results Transfer Operations for the Analysis William V. -
Chapter 4 Vehicle Dynamics
Chapter 4 Vehicle Dynamics 4.1. Introduction In order to design a controller, a good representative model of the system is needed. A vehicle mathematical model, which is appropriate for both acceleration and deceleration, is described in this section. This model will be used for design of control laws and computer simulations. Although the model considered here is relatively simple, it retains the essential dynamics of the system. 4.2. System Dynamics The model identifies the wheel speed and vehicle speed as state variables, and it identifies the torque applied to the wheel as the input variable. The two state variables in this model are associated with one-wheel rotational dynamics and linear vehicle dynamics. The state equations are the result of the application of Newton’s law to wheel and vehicle dynamics. 4.2.1. Wheel Dynamics The dynamic equation for the angular motion of the wheel is w& w =[Te - Tb - RwFt - RwFw]/ Jw (4.1) where Jw is the moment of inertia of the wheel, w w is the angular velocity of the wheel, the overdot indicates differentiation with respect to time, and the other quantities are defined in Table 4.1. 31 Table 4.1. Wheel Parameters Rw Radius of the wheel Nv Normal reaction force from the ground Te Shaft torque from the engine Tb Brake torque Ft Tractive force Fw Wheel viscous friction Nv direction of vehicle motion wheel rotating clockwise Te Tb Rw Ft + Fw ground Mvg Figure 4.1. Wheel Dynamics (under the influence of engine torque, brake torque, tire tractive force, wheel friction force, normal reaction force from the ground, and gravity force) The total torque acting on the wheel divided by the moment of inertia of the wheel equals the wheel angular acceleration (deceleration).