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2017-05-01 ...
  • May 1-3, 2017 (8:00 a.m. - 5:30 p.m.) - Greer, South Carolina
  • October 9-11, 2017 (8:00 a.m. - 5:30 p.m.) - Greer, South Carolina
Training / Education Classroom Seminars
While a variety of new engineering methods are becoming available to assist in creating optimal vehicle designs, subjective evaluation of vehicle behavior is still a vital tool to deliver desired braking, handling, and other dynamic response characteristics. In order to better prepare today’s engineer for this task, this course offers twelve modules devoted to key the fundamental principles associated with longitudinal and lateral vehicle dynamics.
2017-04-06
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-06
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-05
Event
The purpose of this session is to provide a forum for presentations on steering and suspension related topics as it applies to ground vehicles. Papers for this session should address new approaches as well as advances in application of steering, suspension related technologies.
2017-04-05
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-05
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-04
Event
The purpose of this session is to provide a forum for presentations on steering and suspension related topics as it applies to ground vehicles. Papers for this session should address new approaches as well as advances in application of steering, suspension related technologies.
2017-04-04
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-04
Event
The purpose of this session is to provide a forum for presentations on steering and suspension related topics as it applies to ground vehicles. Papers for this session should address new approaches as well as advances in application of steering, suspension related technologies.
2017-04-04
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-04
Event
The purpose of this session is to provide a forum for presentations on steering and suspension related topics as it applies to ground vehicles. Papers for this session should address new approaches as well as advances in application of steering, suspension related technologies.
2017-04-04
Event
This session focusing on vehicle ride comfort, addressing issues such as ride evaluation, suspension tuning, occupant biomechanics, seating dynamics, semi-active and active suspension and vehicle elastomeric components. Topics may include vehicle ride motion smoothness and control balancing, structural shake, impact harshness and after shake, brake judder/pulsation, smooth road shake/shimmy/nibble, power hop, launch shudder, freeway hop and any other phenomena affecting ride comfort.
2017-04-03 ...
  • April 3-5, 2017 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
  • August 7-9, 2017 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • December 6-8, 2017 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
This seminar will present an introduction to Vehicle Dynamics from a vehicle system perspective. The theory and applications are associated with the interaction and performance balance between the powertrain, brakes, steering, suspensions and wheel and tire vehicle subsystems. The role that vehicle dynamics can and should play in effective automotive chassis development and the information and technology flow from vehicle system to subsystem to piece-part is integrated into the presentation. Governing equations of motion are developed and solved for both steady and transient conditions.
2017-03-28
Technical Paper
2017-01-1575
Andrei Keller, Sergei Aliukov, Vladislav Anchukov
Trucks are one of the most common modes of transport and they are operated in various road conditions. As a rule, all-wheel drive trucks are equipped with special systems and mechanisms to improve their cross-country capability and overall efficiency. The usage of blocked mechanisms for power distribution is one of the most popular and effective ways to improve the off-road vehicle performance. However, the lock of differential may adversely affect the stability and control of vehicle because of the unobvious redistribution of reactions acting on wheels, which consequently leads to poor performance and safety properties. Problems of rational distribution of power in transmissions of all-wheel drive vehicles, as well as research in the field of improving directional stability and active safety systems are among the priorities in modern automotive industry.
2017-03-28
Technical Paper
2017-01-0408
Sergei Viktorovich Aliukov
Currently, a group of scientists consisting of six doctors of technical sciences, professors of South Ural State University (Chelyabinsk, Russia) has completed a cycle of scientific research for creation of adaptive suspensions of vehicles. We have developed design solutions of the suspensions. These solutions allow us to adjust the performance of the suspensions directly during movement of a vehicle, depending on road conditions - either in automatic mode or in manual mode. We have developed, researched, designed, manufactured, and tested experimentally the following main components of the adaptive suspensions of vehicles: 1) blocked adaptive dampers and 2) elastic elements with nonlinear characteristic and with improved performance.
2017-03-28
Technical Paper
2017-01-1568
Sriharsha Bhat, Mohammad Mehdi Davari, Mikael Nybacka
As vehicles become electrified and more intelligent in terms of sensing, actuation and processing; a number of interesting possibilities arise in controlling vehicle dynamics and driving behavior. Over-actuation with in- wheel motors, all wheel steering and active camber is one such possibility, which facilitate the control strategies that push boundaries in energy consumption and safety. Optimal control can be used to investigate the best combinations of control inputs to an over-actuated system. This paper shows how an optimal control problem can be formulated and solved for an over-actuated vehicle case, and highlights the translation of this optimal solution to a real-world scenario, enabling intelligent means to improve vehicle efficiency. This paper gives an insight into the Dynamic Programming (DP) as an offline optimal control method that guarantees the global optimum.
2017-03-28
Technical Paper
2017-01-1561
Anton A. Tkachev
Rollover prevention is one of the prominent priorities in vehicle safety and handling control. A promising alternative for roll angle cancellation is the active hydraulically interconnected suspension. This paper represents the analytical model of active hydraulically interconnected suspension system followed by the general simulation. Passive hydraulically interconnected suspension systems have been widely discussed and studied up to now. This work specifically focuses on the active hydraulically interconnected suspension system. Equations of motion of the system are formalised first. The entire system consists of two separate systems that can be modelled independently and further combined together for simulation. One of the two systems is 4 degrees of freedom half-car model which simulates vehicle lateral dynamics and vehicle roll angle response to lateral acceleration in particular.
2017-03-28
Technical Paper
2017-01-1585
Renxie Zhang
A dynamic controller is designed for unmanned skid-steering vehicle, which runs in complex road condition all the time. The vehicle speed is controlled through engine driving torque to achieve the desired vehicle speed and the steering is controlled through hydraulic braking on each side of the vehicle to achieve the desired yaw rate. Due to the complexity in wheel-ground interaction, the tire slip cannot be ignored. Besides, it may result in the saturation of the actuators torque, which will further cause the instability of the skid-steering vehicle. Therefore, contrary to the common approaches considering non-holonomic constraints, tire slip and saturation of actuators torque influencing the driving and braking are considered based on the analysis of vehicle dynamic model and nonlinear tire model. With conditional integrators, a dynamic controller overcoming integral saturation is designed under influence of tire forces and constraint of actuators.
2017-03-28
Technical Paper
2017-01-1578
Tianyang Liu, Zhuoping Yu, Lu Xiong, Wei HAN
Two control strategies, safety preferred control and master cylinder oscillation control, were designed for anti-lock braking on a novel integrated-electro-hydraulic braking system (I-EHB) which has only four solenoid valves in its innovative hydraulic control unit (HCU) instead of eight in a traditional one. The main idea of safety preferred control is to reduce the hydraulic pressure provided by the motor in the master cylinder whenever a wheel tends to be locking even if some of the other wheels may need more braking torque while regarding master cylinder oscillation control, a sinusoidal signal is given to the motor making the hydraulic pressure in the master cylinder oscillate in a certain frequency and amplitude. Hardware-in-the-loop simulations were conducted to verify the effectiveness of the two control strategies mentioned above and to evaluate them.
2017-03-28
Technical Paper
2017-01-1556
Jianbo Lu, Li Xu, Daniel Eisele, Stephen Samuel, Matthew Rupp, Levasseur Tellis
The paper presents an advanced yaw stability control (AYSC) system that uses a centralized inertial measurement unit (IMU) to measure the 6 DOF motions of a vehicle and uses the enhanced vehicle states to improve the effectiveness of the traditional electronic stability control (ESC) systems. The MEMS based IMU has nowadays been widely used in consumer electronics, such as smart phones, and its cost has been significantly reduced, which makes it feasible to roll out IMU for ESC type of systems. The additional info from an IMU helps improve the sensing capability of a vehicle, which in turn leads to refined stability control commands for AYSC such that the better control performance than the traditional ESC can be achieved (w.r.t. the real world driving scenarios). Vehicle tests will be used to show the improved control performance.
2017-03-28
Technical Paper
2017-01-1553
Min Kyoo Kang, Jin Hong Kim, HyuckJin Oh, Wookjin Jang, Sangwoo Lee, Young Hwan Lee
This paper presents a transient nonlinear vibration analysis of a full-vehicle model. The full-vehicle model consists of a powertrain model, a trimmed body, a drive line, and front and rear suspensions with tires, and is driven by combustion forces and runs on a road surface. The fundamental purpose of the transient nonlinear full-vehicle simulation is to replicate customer’s experience in driving situation in the time domain and to understand real-time phenomena. By performing time-domain simulation, it is possible to capture nonlinear behavior of a vehicle such as preloads due to gravitational force, large deformation, and material nonlinearity which cannot be properly considered in the conventional steady state analysis due to intrinsic linearization process. In constructing a full-vehicle, validation process is essential. Validation process is applied with respect to the assembling sequence.
2017-03-28
Technical Paper
2017-01-1479
Wei Wang, Xinbo Chen
Electrified chassis system featuring distributed wheel drive and independent steering has become a research focus of EVs considering the increasing demand of maneuverability for intelligent driving. The concept of multi-function chassis corner presents new challenges also revolution opportunity of traditional suspension mechanism. The question is how to increase the system compactness with different actuators in limited wheel side space as well as keeping dynamic performance of chassis. Rather than providing isolated structures, the primary focus of the research is to present a general design method of independent suspension topological structures suitable for function integration. This paper suggested that the distributed drive-line can be part of suspension and constrain the knuckle motion together with other suspension links, thus the system could be synthesized integrally in terms of mechanisms in order to obtain more compact solutions.
2017-03-28
Technical Paper
2017-01-1480
Zhenfeng Wang, Mingming Dong, Yechen Qin, Feng Zhao, Liang Gu
Abstract: The study of controllable suspension properties special in the characteristics of improving ride comfort and road handling is a challenging task for vehicle industry. Currently, since most suspension control requires the observation of unmeasurable states, how to accurately acquire the states of a suspension system attracts more attention. To solve this problem, a novel approach interacting multiple mode Kalman Filter (IMMKF) is proposed in this paper. Suspension system parameters are crucial for the performance of state observers. Uncertain suspension system parameters in various conditions, e.g. due to additional load, have significant effect on state estimation. Simultaneously, state transition among different models may be happened on the condition of varying system parameters.
2017-03-28
Technical Paper
2017-01-1481
Kyung-bok Lee, Sanghyuk lee, Namyoung Kim, Adm Tae soo Chi, Adm Do young kim
Conventional EPS systems are operated by one type of steering tuning map set by steering test drivers before releasing to customers. That is, steering feeling can't change by other conditions such as road condions(low mu, high mu, unpaved roads) or some specific driving condtions(emergency braking/EPS fail modes/full gasing start). Those conditiions can't afford the drivers consistent steering feel and vehicle driving. This paper approached the techonology detecting those conditions by using vehicle sensors such as wheel speed/vehicle speed/steering angle/steering torque/steering speed and so on. After detecting those conditions and judging which one is the best steering feel and safe vehicle driving, EPS system automatically can be changed with the steering friction level and selection of steering opitmized mapping on several conditions. I believe that this technology can afford the customer "Joy of driving and fun to drive".
2017-03-28
Technical Paper
2017-01-1482
Jens Dornhege, Simon Nolden, Martin Mayer
The layout of a vehicle steering system has to resolve a compromise. While it is important for lateral vehicle control to feel steering torque feedback of lateral tire to ground interaction, disturbing forces shall not be present in the feedback steering torque. These disturbing forces can result from road irregularities, wheel rotor imbalance, suspension asymmetry caused by production tolerances, wear or impacts, and additional vehicle internal forces, e.g. the steered wheels also driven by the engine or braked. In general these disturbances are reduced by an optimization of the suspension geometry to decrease the impact of the unintended forces on the steering system. The remaining disturbance is controlled to an acceptable level via force feedback sensitivity calibration of the steering system, what in return influences the intended driver sensitivity to feel lateral tire forces.
2017-03-28
Technical Paper
2017-01-1486
Shashikant Sharma, Thomas Mathai, Megan Wooley, Daniel Moore
Decoupler in a hydraulic engine mount (HEM) acts as a binary gate, an ON/OFF switch. Depending on operating condition it either floats or sinks. This study was focused on studying decoupler as a gradual gate rather than binary sub-system. Major objectives of this study involved designing decoupler for a tunable and optimum stiffness response that could deliver desired low and high frequency dynamic response for HEM as a system. A simplified lumped parameter dynamic model was developed for HEM, capable of predicting low and high frequency resonance. Measured characteristics of decoupler and physical linear/non-linear parameters of rubber element along with fluid column were utilized to provide quantitative validation of experimental dynamic response of HEM as a system. Preliminary work shows highly encouraging correlation between analytical model and experimental data.
2017-03-28
Technical Paper
2017-01-1487
Russ Norton, Ben Bulat, Ahmed Mohamed
The RLM algorithm seeks to resolve the tradeoff of high damping rates required to control the loads and the need for lower damping forces to improve secondary ride. As the base active damping forces are increased to control the loads, ride benefits of the system are diminished. To ensure the best possible outcome, the team sought to reduce the tradeoffs by looking for a way to switch the damping force fast enough to manage the loads without affecting secondary ride. The RLM algorithm is designed to manage the road loads when driving through potholes. The algorithm detects the presence of a pothole based on individual suspension velocity and direction. When the wheel enters the pothole, the suspension velocity increases quickly while traveling downward (suspension rebound travel) into the pothole.
2017-03-28
Technical Paper
2017-01-1488
Srinivas Kurna, Ruchik Tank, Riddhish Pathak
The job of a suspension system is to maximize the friction between the tires and the road surface, to provide steering stability with good handling and to act as a cushioning device ensuring the comfort of the driver & passengers. The suspension also protects the vehicle itself and any cargo or luggage from damage and wear. Almost all heavy duty vehicles use inverted type suspension system which is also called as bogie type suspension system. The design of this type of suspension is a complex and difficult science which has evolved over many years. It was recognized very early in the development of suspensions that the interface between vehicle body and wheel needed some sort of cushioning system to reduce the vibration felt as the vehicle moved along. This was already part of road coach design and took the form of leaf (laminated) steel springs mounted on the axles, upon which the vehicle body rested.
2017-03-28
Technical Paper
2017-01-1491
Manish Kumar Seth, Jens Glorer, Ralf schellhaas
This paper outlines the invention, patented under patent number US 9,315,087 B2, on how a twist beam can be efficiently designed for a given roll stiffness by using the sectional properties of the beam section in combination with a long reinforcement and curved flanges. This helps in reducing the weight and cost in addition to improve the durability performance and camber compliance of the twist beam structure while using conventional stamping and welding technologies. As against the conventional method of changing the roll stiffness only with the thickness of the torsion beam, the invention detailed in this paper uses the shape and the thickness of the torsion profile to control the roll stiffness.The paper details the work done to develop the design concept and the validation using rig and vehicle level testing. This invention has been successfully patented with USPTO in 20166 (Patent number US 9,315,087 B2)
2017-03-28
Technical Paper
2017-01-1483
Jia Mi
This paper presents a novel application of hydraulic electromagnetic energy-regenerative shock absorber (HESA) into bogie system of railway vehicles. In order to find out the relationship and differences between first suspension system and second suspension system when installed it, HESA is built in AMESim to make comparison studies on the different department suspensions caused by the nonlinear damping behaviors of the HESA. The simulation results show that the system can effectively reduce the impact between wheel and rail tracks, while maintaining good potential to recycle vibratory energy. And the relationships as well as differences between the first suspensions and second suspensions have been concluded, which are useful for the design of HESA-Bogie.
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