Bibliografie tematiche / Vehicle handling performance

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Letteratura scientifica selezionata sul tema "Vehicle handling performance"

Autore: Grafiati

Pubblicato: 23 settembre 2022

Ultima modifica: 28 settembre 2022

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Articoli di riviste sul tema "Vehicle handling performance"

Chen, Wen. "The Analysis of Dynamic Performance on Four-Wheel Steering Vehicle Model". Advanced Materials Research 308-310 (agosto 2011): 767–70. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.767.

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Four-wheel steering (4WS) is an advanced vehicle control technique which can improve steering characteristics. Compared with traditional two wheel steering (2WS) vehicles, 4WS vehicle can steer the front wheels and the rear wheels individually when cornering, according to the vehicle motion states such as vehicle speed, yaw velocity and lateral acceleration. Therefore, 4WS can enhance the handling stability and improve the active safety for vehicle. In this paper, the motion characteristics of 4WS vehicle are analyzed. The steering dynamics model of vehicle is established, and the transfer function of deflection angle of mass center to steering angle of 4WS vehicle is deduced. The handling stability of 4WS vehicle is researched by virtue of Matlab/simulink, Simulation results show that the 4WS vehicle is agile to and consistent with steering input and the transient handling stability is improved distinctly without increasing driver’s handling burden.

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Smith, Wade A., Nong Zhang e William Hu. "Hydraulically interconnected vehicle suspension: handling performance". Vehicle System Dynamics 49, n. 1-2 (febbraio 2011): 87–106. http://dx.doi.org/10.1080/00423111003596743.

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Peng, Dengzhi, Gangfeng Tan, Kekui Fang, Li Chen, Philip K. Agyeman e Yuxiao Zhang. "Multiobjective Optimization of an Off-Road Vehicle Suspension Parameter through a Genetic Algorithm Based on the Particle Swarm Optimization". Mathematical Problems in Engineering 2021 (31 gennaio 2021): 1–14. http://dx.doi.org/10.1155/2021/9640928.

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Ride comfort and handling performances are known conflicts for off-road vehicles. Recent publications focus on passenger vehicles on class B and class C roads, while, for off-road vehicles, they should be able to run on rougher roads: class D, class E, or class F roads. In this paper, a quarter vehicle model with nonlinear damping is established to analyze the suspension performance of a medium off-road vehicle on the class F road. The ride comfort, road holding, and handling performance of the vehicle are indicated by the weighted root mean square (RMS) value of the vertical acceleration of the sprung mass, suspension travel, and tire deflection. To optimize these objectives, the genetic algorithm (GA), particle swarm optimization (PSO), and a genetic algorithm based on the particle swarm optimization (GA-PSO) are initiated. The efficiency and accuracy of these algorithms are compared to find the best suspension parameters. The effect of the optimized method is validated by the field test result. The ride comfort, road holding, and handling performance are improved by approximately 20%.

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Li, Hai Bin, e Peng Ji. "Analysis on Vehicle On-Center Performance". Advanced Materials Research 482-484 (febbraio 2012): 1302–6. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1302.

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On-center handling performance for high speed vehicle is becoming more and more concerned. Road feel is the most indexes to evaluate the on-center handling performance. Steering system is the key part of the whole vehicle to affect the performance, which include much nonlinearity: steer ratio, dry friction and stiffness etc. In this paper, steering system model is set up by ADAMS, and embed into the whole vehicle model to study the effects of these nonlinearities on on-center handling performance.

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Wei, Terence, e Hans Dorfi. "Identification of Tire Force and Moment (F&M) Characteristics That Improve Combined Slip Handling Performance". Tire Science and Technology 47, n. 1 (1 marzo 2019): 55–76. http://dx.doi.org/10.2346/tire.19.160109.

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Abstract (sommario):

ABSTRACT Since tires generate the control forces required for the operation of a vehicle, the tire force and moment (F&M) characteristics have to be designed such that the vehicle can easily be kept under driver control under many driving conditions. However, the relationship between F&M characteristics and vehicle handling performance is not well understood for many driving maneuvers. A better understanding of this relationship would thus provide insight into how to improve the matching between tires and vehicles for increased vehicle stability. Building a large number of tires with different characteristics would be too expensive and time consuming, so an investigation using simulations is preferred. However, one problem with simulations is that handling performance cannot be evaluated by a professional driver (subjective metrics), unlike in outdoor tests. A way of evaluating handling performance in simulation through objective metrics is therefore necessary. In this study, the focus is on vehicle handling performance during simultaneous cornering and braking. Desirable F&M metrics were identified using the following process: Handling simulations were validated using instrumented vehicle measurements of handling behavior at outdoor test facilities. An objective handling metric (peak body slip angle) was identified that has high correlation with professional driver ratings (subjective metric) of combined slip handling performance. The objective metric could therefore be used with simulations to predict the professional driver rating. Many virtual tires were generated by changing F&M characteristics of Pacejka tire models. These virtual tires were used in simulations of combined slip handling maneuvers and evaluated for performance using the objective handling metric. By identifying which changes to F&M metrics had high correlation to changes in handling performance, the primary influencing characteristics were determined. These results were also confirmed by looking at the correlation between F&M metrics of actual tires and their subjective ratings.

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Huh, K., J. Kim e J. Hong. "Handling and driving characteristics for six-wheeled vehicles". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 214, n. 2 (1 febbraio 2000): 159–70. http://dx.doi.org/10.1177/095440700021400205.

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Handling performance of six-wheeled special-purpose vehicles is investigated in this study. Six-wheel drive (6WD) vehicles are believed to have good performance in off-the-road manoeuvring and to have fail-safe capabilities when one or two of their tyres are blown. However, the handling performance of six-wheel steering (6WS) vehicles is not yet well understood in the relevant literature. In this paper, six-wheeled vehicles are modelled as an 18 degree-of-freedom (DOF) system that considers non-linear vehicle dynamics, tyre models and kinematic effects. The vehicle model is constructed into a simulation tool using MATLAB/SIMULINK so that input/output and vehicle parameters can be changed easily using the modulated approach. Handling performance is analysed not only from the frequency domain but also from the time domain. Simulation results demonstrate that the effect of middle-wheel steering is not negligible from the viewpoint of handling characteristics such as yaw rate, lateral acceleration, etc. The simulation tool is also utilized for the manoeuvring analysis over a rough rigid surface, where the separation between the wheels and the road can be considered. In addition, a new 6WS control law is proposed in order to minimize the sideslip angle. Lane change simulation results show the advantage of 6WS vehicles with the proposed control law.

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Wu, Xuting, Max Farhad e Jason Wong. "Investigating and Improving Vehicle Transient Handling Performance". SAE International Journal of Materials and Manufacturing 4, n. 1 (12 aprile 2011): 1080–98. http://dx.doi.org/10.4271/2011-01-0987.

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Ahmed, M., M. El-Gindy e H. Lang. "Handling performance of an 8x8 combat vehicle". IOP Conference Series: Materials Science and Engineering 973 (18 novembre 2020): 012009. http://dx.doi.org/10.1088/1757-899x/973/1/012009.

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HARADA, Hiroshi, Masanori HARADA, Yoshiaki ARAKI e Masahiro OOYA. "Crosswind Handling Performance for Driver-Vehicle System." Transactions of the Japan Society of Mechanical Engineers Series C 65, n. 629 (1999): 222–28. http://dx.doi.org/10.1299/kikaic.65.222.

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Liu, Yong Chen, e Li Sun. "Steering Wheel Angle Pulse Input Simulation and Evaluation of a Car Based on ADAMS". Advanced Materials Research 383-390 (novembre 2011): 7461–64. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.7461.

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Abstract (sommario):

Vehicle’s steering wheel angle pulse input performance was an representative test of handling and stability, it characterizes vehicle’s handling and stability by the transient response of the steering wheel angle pulse input. Taking a car for example, in the ADAMS software, vehicle dynamics model was established. According to GB/T6323.3—94 standards, the steering wheel angle pulse input virtual test was carried out, and then applied the QC/T 480—1999 limit vehicle handling and stability indices and assessment methods to evaluate the results of the simulation, the result is 66.2247 points, among that, the resonant peak level is 36.0973 points, indicating the vehicle's steering transient response ability is poor, should be improved.

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Più fonti

Tesi sul tema "Vehicle handling performance"

Rengaraj, Chandrasekaran. "Integration of active chassis control systems for improved vehicle handling performance". Thesis, University of Sunderland, 2012. http://sure.sunderland.ac.uk/4017/.

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This thesis investigates the principle of integration of vehicle dynamics control systems by proposing a novel control architecture to integrate the brake-based electronic stability control (ESC), active front steering (AFS), normal suspension force control (NFC) and variable torque distribution (VTD). A nonlinear 14 degree of freedom passive vehicle dynamics model was developed in Matlab/Simulink and validated against commercially available vehicle dynamics software CarSim. Dynamics of the four active vehicle control systems were developed. Fuzzy logic and PID control strategies were employed considering their robustness and effectiveness in controlling nonlinear systems. Effectiveness of active systems in extending the vehicle operating range against the passive ones was investigated. From the research, it was observed that AFS is effective in improving the stability at lower lateral acceleration (latac) region with less interference to the longitudinal vehicle dynamics. But its ability diminishes at higher latac regions due to tyre lateral force saturation. Both ESC and VTD are found to be effective in stabilising the vehicle over the entire operating region. But the intrusive nature of ESC promotes VTD as a preferred stability control mechanism at the medium latac range. But ESC stands out in improving stability at limits where safety is of paramount importance. NFC is observed to improve the ability to generate the tyre forces across the entire operating range. Based on this analysis, a novel rule based integrated chassis control (ICC) strategy is proposed. It uses a latac based stability criterion to assign the authority to control the stability and ensures the smooth transition of the control authority amongst the three systems, AFS, VTD and ESC respectively. The ICC also optimises the utilisation of NFC to improve the vehicle handling performance further, across the entire operating regions. The results of the simulation are found to prove that the integrated control strategy improves vehicle stability across the entire vehicle operating region.

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Siramdasu, Yaswanth. "Discrete Tire Model Application for Vehicle Dynamics Performance Enhancement". Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/74394.

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Tires are the most influential component of the vehicle as they constitute the only contact between the vehicle and the road and have to generate and transmit forces necessary for the driver to control the vehicle. The demand for the tire models are increasing due to the need to study the variations of force generation mechanisms due to various variables such as load, pressure, speed, and road surface irregularities. Another need from the vehicle manufactures is the study of potential incompatibilities associated with safety systems such as Anti-lock Braking System (ABS) and Electronic Stability Control (ESC) and tires. For vehicle dynamic simulations pertaining to the design of safety systems such as ABS, ESC and ride controllers, an accurate and computationally efficient tire model is required. As these control algorithms become more advanced, they require accurate and extended validity in the range of frequencies required to cover dynamic response due to short wavelength road disturbances, braking and steering torque variations. Major thrust has been provided by the tire industry to develop simulation models that accurately predict the dynamic response of tires without the use of computationally intensive tools such as FEA. The objectives of this research are • To develop, implement and validate a rigid ring tire model and a simulation tool to assist both tire designers and the automotive industry in analyzing the effects of tire belt vibrations, road disturbances, and high frequency brake and steering torque variations on the handling, braking, and ride performances of the vehicle. • To further enhance the tire model by considering dynamic stiffness changes and temperature dependent friction properties. • To develop, and implement novel control algorithms for braking, stability, and ride performance improvements of the vehicle
Ph. D.

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Nazzal, Dima. "Analytical Approach to Estimating AMHS Performance in 300mm Fabs". Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11557.

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This thesis proposes a computationally effective analytical approach to automated material handling system (AMHS) performance modeling for a simple closed loop AMHS, such as is typical in supporting a 300mm wafer fab bay. Discrete-event simulation can produce accurate assessments of the production performance, including the contribution by the AMHS. However, the corresponding simulation models are both expensive and time-consuming to construct, and require long execution times to produce statistically valid estimates. These attributes render simulation ineffective as a decision support tool in the early phase of system design, where requirements and configurations are likely to change often. We propose an alternative model that estimates the AMHS performance considering the possibility of vehicle-blocking. A probabilistic model is developed, based on a detailed description of AMHS operations, and the system is analyzed as an extended Markov chain. The model tracks the operations of all the vehicles on the closed-loop considering the possibility of vehicle-blocking. The resulting large-scale model provided reasonably accurate performance estimates; however, it presented some computational challenges. These computational challenges motivated the development of a second model that also analyzes the system as an extended Markov chain but with a much reduced state space because the model tracks the movement of a single vehicle in the system with additional assumptions on vehicle-blocking. Neither model is a conventional Markov Chain because they combine the conventional Markov Chain analysis of the AMHS operations with additional constraints on AMHS stability and vehicle-blocking that are necessary to provide a unique solution to the steady-state behavior of the AMHS. Based on the throughput capacity model, an approach is developed to approximate the expected response time of the AMHS to move requests. The expected response times are important to measure the performance of the AMHS and for estimating the required queue capacity at each pick-up station. The derivation is not straightforward and especially complicated for multi-vehicle systems. The approximation relies on the assumption that the response time is a function of the distribution of the vehicles along the tracks and the expected length of the path from every possible location to the move request location.

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Lee, Moonsu. "Analytical models to evaluate system performance measures for vehicle based material-handling systems under various dispatching policies". Diss., Texas A&M University, 2005. http://txspace.tamu.edu/bitstream/handle/1969.1/2352/etd-tamu-2005A-INEN-Lee.pdf?sequence=1.

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Pagliarecci, Nico. "On the understanding of the vehicle-driver interaction using the objectification of subjective assessment : application to the tire development process". Thesis, Mulhouse, 2020. http://www.theses.fr/2020MULH4104.

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Le pneu est fortement impliqué dans les performances d'un véhicule. La consommation de carburant du véhicule (résistance au roulement, aérodynamisme), le bruit, le confort, la tenue de route et la sécurité sont liés au pneumatique choisi. En utilisant des mesures objectives, il est possible de prédire certaines de ces caractéristiques, mais pour d'autres comme la manipulation, nous ne pouvons pas vraiment prédire l'évaluation subjective faite par des pilotes d'essai expérimentés. La méthodologie essai/erreur est parfois appliquée pour identifier le potentiel des pneus et évaluer les performances des pneus en fonction de conceptions et de caractéristiques mécaniques spécifiques.Aujourd'hui, dans l'industrie automobile, l'évaluation des performances de conduite des véhicules et des pneus est encore largement réalisée sur une base subjective par des conducteurs d'essai expérimentés. Ceci est justifié par le fait que la perception par les clients des performances du véhicule est également subjective et qu'aucune relation fiable n'a été trouvée pour relier les mesures objectives des performances à la perception humaine des performances.Une revue de littérature approfondie sur l'objectivation de l'évaluation subjective, l'interaction véhicule-conducteur, la simulation de la dynamique du véhicule et l'analyse de données multivariée exploratoire ainsi que les tests d'hypothèses statistiques est la première étape de la recherche visant à étudier les méthodologies, l'analyse des données et les outils statistiques. utilisé par d'autres chercheurs.Sur la base de la revue de la littérature, la thèse propose une méthodologie qui permet de traduire des évaluations subjectives en métriques objectives (environnement véhicule ainsi qu'environnement véhicule-pneu) permettant la prédiction du résultat d'un test subjectif en utilisant des mesures objectives conduisant à une réduction de les itérations au cours du processus de développement du pneu. Le choix de la complexité du modèle de dynamique du véhicule le plus pertinent décrit les principales caractéristiques mécaniques du pneu affectant les performances de tenue de route et leur effet sur les métriques objectives d'intérêt.Des manœuvres expérimentales spécifiques de la dynamique du véhicule ont été sélectionnées pour cette étude dans le but de dévoiler la complexité de l'évaluation subjective de la maniabilité sans être simpliste et en prêtant attention à l'interconnexion des différentes variables et à leur interaction avec les facteurs contextuels.Dans le cadre de l'étude de corrélation mentionnée ci-dessus, le rôle du conducteur dans le système conducteur-véhicule est étudié. Les résultats présentés montrent qu'avec la méthodologie choisie, il est possible de mieux comprendre la stratégie de test du conducteur en identifiant les principales réponses du véhicule affectant toutes les étapes de l'évaluation subjective.Pour approfondir et renforcer la compréhension du rôle du conducteur, deux études de panel impliquant des conducteurs professionnels et non professionnels ont été réalisées. Celles-ci ont permis l'étude et l'analyse de l'interaction véhicule-conducteur en termes de proprioception et de vision, d'influences audiovisuelles et de séquelles en mouvement
The tire is heavily involved in the performance of a vehicle. Vehicle's fuel consumption (rolling resistance, aerodynamics), noise, comfort, handling and safety are related to the tire chosen. By using objective measurements, it is possible to predict some of those features but for some others like handling we cannot really predict the subjective evaluation made by experienced test drivers. Trial/error methodology is sometimes applied to identify tire potential and to gauge the tire performance related to specific designs and mechanical characteristics.Today, in the automotive industry, the evaluation of vehicle and tire handling performance is still largely performed on a subjective basis by experienced test drivers. This is justified by the fact that customer perception of vehicle performance is also made subjectively and, no reliable relationship has been found to relate objective performance measures to the human perception of performance.An extensive literature review on the objectification of subjective assessment, the vehicle-driver interaction, the vehicle dynamics simulation and the explorative multivariate data analysis as well as statistical hypothesis testing is the first research step aimed to investigate the methodologies, the data analytics and statistical tools used by other researchers.Based on the literature review, the thesis proposes a methodology that allows to translate subjective evaluations into objective metrics (vehicle environment as well as vehicle-tire environment) enabling the prediction of the outcome of a subjective test by using objective measurements leading to a reduction of the iterations during the tire development process. The choice of the most relevant vehicle dynamics model’s complexity depicts the main tire mechanical features affecting the handling performance and their effect on the objective metrics of interest. Specific experimental vehicle dynamics maneuvers have been selected for this study with the aim of unpacking the complexity of the subjective handling assessment without being simplistic and paying attention to interconnectedness of the different variables and their interplay with contextual factors.In the frame of the above-mentioned correlation study, the role of the driver in the driver-vehicle system is investigated. The results presented show that, with the chosen methodology, it is possible to gain insights on the driver’s testing strategy identifying the main vehicle responses affecting all the stages of the subjective evaluation. To deepen and strengthen the understanding of the driver’s role, two panel studies involving professional and non-professional drivers have been carried out. Those allowed the study and analysis of the vehicle-driver interaction in terms of proprioception and vision, audio-visual influences and aftereffects in motion

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Dixon, Philip John. "The influence of the sideslip target on the performance of vehicles with actively controlled handling". Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/14216.

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Abstract (sommario):

The influence of sideslip on the handling capability of a four wheeled vehicle is investigated. Both nonlinear, steady-state and linear, transient analyses are conducted on simple models in order to understand how the geometric and inertial effects of sideslip control influence the maneuvering capability of the vehicle. Nonlinear performance analyses confirm the findings of the literature, that constant sideslip angle at the centre of mass is required if it is desired to maintain consistent vehicle 'balance' with increasing lateral acceleration, and the reason for this is explained using simple mathematics. Analyses of energy flow between the power source and the various sinks of the vehicle show that for a typical modem vehicle, the power dissipated in a steady turn near the limiting lateral acceleration is approximately comparable in magnitude to that dissipated by aerodynamic drag near the maximum speed of the vehicle. Additionally, it shown that whenever brake control, rather than steering control, is employed to generate a yawing moment, the component of dissipated energy associated with this yaw demand is larger by at least an order of magnitude. It is concluded that whenever the required dynamic behaviour can be delivered by means of steering alone pure steering control should be preferred over the use of direct yaw control. This suggests that direct yaw control should only be used when the limit of the envelope of the steered vehicle has been reached. Transient analyses of sudden turn-in events are then undertaken. The assumption is that the driver wishes to maximise the lateral displacement of the vehicle as quickly as possible. Vehicle handling models with A WS are linearised and discretised, and Linear Progranuning is used to identifY the optimal turn-in maneuver. The objective is to understand how to make a vehicle perform well against such a target without any use of any energy-dissipating direct yaw control. It is observed that the optimal controls usually involve an immediate step to the limiting force that the front axle is able to deliver. It is shown that for vehicles with yaw dynamics where this input does not lead to saturation of the rear tyres, the transient performance is totally insensitive to changes in the enforced sideslip control. The form of this optimal force input is then used in a further mathematical analysis of the optimal obstacle avoidance maneuver. It is shown that in the case mentioned above, where sufficient friction is available at the rear axle, the time taken to build up lateral acceleration and yaw rate for a turn is a simple function of the geometric and inertial properties of the vehicle, and unrelated to rear tyre cornering stiffness, rear camber or rear steering control. It is shown also shown that for an equal level of limit over- or under-steer, 2WS vehicles that are limit over-steering are able to turn in more quickly than those which are limit under-steering, since the excess friction is available at the front axle, and can be used during the turn-in phase. Further, it is shown that both commonly adopted sideslip targets for 4WS vehicles and responses that often result from 2WS vehicles can easily be 'incompatible' with the handling envelope of a steered vehicle from an optimal obstacle avoidance point of view. This means that for some vehicles, strict enforcement of such sideslip targets directly increases the time taken to transfer such a vehicle to the limiting lateral acceleration. This limit of 'compatibility' of the sideslip target and vehicle envelope is confirmed analytically. It is then shown, that the zero sideslip target which is commonly adopted for A WS vehicles in the literature, and which was previously shown to be the ideal for consistent vehicle stability and 'balance', is only able to deliver the optimal turn-in behaviour when the underlying vehicle has a limit-neutral or limit under-steering balance. Further, the zero sideslip target requires a strongly limit under-steering balance if the sideslip target is to be maintained when the vehicle is rnaneuvered from turning quickly in one direction to turning quickly in the other without compromising the time taken to complete the maneuver. However, it is also shown that either a controlled front differential, or front axle direct yaw-moment control are each able to extend the envelope of the vehicle in the necessary direction that maintaining zero sideslip throughout such transients may become feasible, albeit at an energy cost that increases as the vehicle is maneuvered more rapidly. Additionally, an alternative sideslip target is presented, that allows optimal maneuvering to take place whilst the sideslip target is simultaneously maintained, without requiring the intervention of controlled differentials or direct yaw control.

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Dai, Sheng-Ru, e 戴聖儒. "Optimization of Alignment by Vehicle Handling Performance Evaluation". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/35183008514471167661.

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Abstract (sommario):

碩士
國立屏東科技大學
機械工程系所
104
In this study, we propose the direction of improvement by design and manufacture of the actual vehicle. First, we test the actual vehicle handling performance of whole vehicle and measure the K&C test, at the same time carry on analysis of objective evaluation and correct the model. The comparison of actual vehicle and simulation, confirmed the correctness of model and proposed improvement according to the result and problem. After the actual vehicle test and analysis, we found the 4 problems, respectively: first, the variation of toe angle about 4°, is more than the commercial vehicle. Second, the steering characteristics are not consistency. The process of steering from under steer become to over steer. Third, through the exercise test, the knuckle of flexible body model was appeared the problem of centralized stress. Fourth, the steering wheel recovery test is slightly worse than commercial vehicle. After the optimization analyze and modification design, aimed to sensitivity analysis of toe angle and Ackerman error. The results shows the gradient of toe angle decrease to -0.0022959 deg/mm and steering characteristics become to single characteristic is over steer. In the end, we focus on improved the centralized stress of knuckle and the results showed the weight decrease 3%. The maximum stress decreased about one half of original maximum stress. The problem of centralized stress was significantly improved.

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Jian, Lian-An, e 簡聯安. "Studies of Tire Design for Vehicle Handling Performance". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/87uvcc.

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碩士
國立臺灣大學
機械工程學研究所
106
In this study, the finite element software is used to build the tire model and analyze the steady-state rolling simulation of the cornering power (CP) and the cornering force (CF), and the tire mechanical characteristic curves under different loads are further output in the vehicle simulation software to simulate the steady-state circular test procedure. After verification by the experiment, this study completes the handling performance analysis tool from tire to vehicle. To model a tire and interaction with the environment not only properties of rubber hyperelasticity and viscoelasticity are considered, but also a thorough knowledge of the tire friction mechanism is required. It is necessary to carry out the rubber friction-wear experiment to obtain the correct friction properties. The results show that the Coulomb friction model cannot change the friction coefficient according to the contact pressure and sliding velocity of each point on the contact patch. That is, the often used Coulomb friction model with a constant friction coefficient is in general not realistic in the case of rubber friction. The tire model is verified by static stiffness test and tire mechanics test, and the vehicle model is verified by real vehicle test. Using the tools established in this study to explore the effects of tire pressure conditions and tire design parameters on vehicle handling performance. From the analysis results, this study proposes the design direction of tire handling performance optimization in tread design and rubber stiffness.

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Lai, I.-An, e 賴奕安. "Study of Evaluation and Improvement for the Performance of Vehicle Handling". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/39394909402818865648.

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Abstract (sommario):

碩士
國立屏東科技大學
車輛工程系所
101
This thesis aims to investigate the vehicle motion in the vehicle handling performance test for a production car. An evaluation of the vehicle handling performance is performed by using the vehicle motion parameters. Based on the sensitivity analysis and optimization, a method for improving the performance of the vehicle handling is developed and verified. Firstly, a full vehicle model is constructed by ADAMS/Car software. Then, the double lane change, steady static circular and step steering tests are simulated. The influences of the vehicle operating and suspension design parameters on the vehicle motion are investigated. The vehicle motion parameters include the lateral acceleration, yaw rate, roll angle, steering wheel angle, tire later force and tire normal force. In addition, the vehicle operating parameters include the position of center-of-gravity, camber and toe. The considered suspension design parameters include the locations of the hard points, wheel alignment angles and the characteristics of the flexible components. Secondly, several objective evaluation indexes are calculated in the MATLAB software. Finally, the ADAMS/Insight module is employed to perform the sensitivity analysis and optimizing the vehicle handling performance. The results reveal that the individual test can not evaluate the performance of vehicle handling effectively. Thus, the comprehensive vehicle handling performance tests should be performed and the integral evaluation is needed. Keywords: Vehicle handling performance, Suspension system, Sensitivity analysis, Optimization

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Liu, Peijun. "An analytical study of ride and handling performance of an interconnected vehicle suspension". Thesis, 1994. http://spectrum.library.concordia.ca/57/1/MM90855.pdf.

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Design of a vehicle suspension involves a difficult compromise among the ride, handling and directional control performance characteristics. While a soft suspension is desired to enhance ride quality, hard suspension springs are required to achieve good handling and directional control performance. Auxiliary roll stiffeners, in conjunction with soft suspension, are frequently used to attain an acceptable compromise between ride and handling performance of a vehicle. Alternatively, an improved compromise between ride and handling can be realized by interconnecting hydro-pneumatic suspension struts in the roll plane. The interconnected suspension can provide soft suspension rate for improved ride quality, and firm roll stiffness and damping for adequate handling and control performance. In this dissertation, a hydro-pneumatic suspension, interconnected in the roll plane, is analytically investigated for its ride and handling performance potentials. A highway bus equipped with the interconnected hydro-pneumatic suspension system is modeled in the roll plane as a four-degrees-of-freedom dynamical system subject to excitations arising from road irregularities and roll moment caused by directional maneuvers. The static and dynamic properties of the interconnected suspension are derived and discussed in terms of its load-carrying capacity, suspension rate, roll stiffness, and damping forces. The ride and handling performance characteristics of the interconnected suspension are deterministic excitations. A passive variable damping mechanism is proposed and investigated to achieve improved vehicle ride quality. The vibration isolation performance characteristics of the interconnected suspension employing the variable damping valves are further investigated for deterministic and random excitations. From the computer simulation results, it is concluded that the interconnected hydro-pneumatic suspension with inherent enhanced anti-roll stiffness and damping characteristics can provide an improved compromise between ride comfort and handling performance of a vehicle.

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Libri sul tema "Vehicle handling performance"

Gilyard, Glenn B. In-flight transport performance optimization: An experimental flight research program and an operational scenario. Edwards, Calif: National Aeronautics and Space Administration, Dryden Flight Research Center, 1997.

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George C. Marshall Space Flight Center. e Thiokol Corporation Space Operations, a cura di. Environmental data recorder (EDR) qualification final test report. Brigham City, UT: Thiokol Corp., Space Operations, 1991.

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NASA Dryden Flight Research Center., a cura di. In-flight transport performance optimization: An experimental flight research program and an operational scenario. Edwards, Calif: National Aeronautics and Space Administration, Dryden Flight Research Center, 1997.

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In-flight transport performance optimization: An experimental flight research program and an operational scenario. Edwards, Calif: National Aeronautics and Space Administration, Dryden Flight Research Center, 1997.

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Capitoli di libri sul tema "Vehicle handling performance"

Guiggiani, Massimo. "Vehicle Model for Handling and Performance". In The Science of Vehicle Dynamics, 47–98. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8533-4_3.

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Guiggiani, Massimo. "Vehicle Model for Handling and Performance". In The Science of Vehicle Dynamics, 67–168. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73220-6_3.

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Takagi, F., T. Shiiba, R. Ishizaki, K. Tamura e H. Hata. "Evaluation of handling performance in steer-by-wire vehicle". In Advanced Vehicle Control AVEC’16, 411–16. CRC Press/Balkema, P.O. Box 11320, 2301 EH Leiden, The Netherlands, e-mail: Pub.NL@taylorandfrancis.com, www.crcpress.com – www.taylorandfrancis.com: Crc Press, 2016. http://dx.doi.org/10.1201/9781315265285-66.

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Yang, Wan’an, Hongjun Liu e Yunxiang Shi. "Correlation Study on Vehicle Dynamics Handling Performance Parameters". In Proceedings of China SAE Congress 2020: Selected Papers, 577–88. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-2090-4_35.

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Ahmadian, Mehdi. "Closed-form Analysis of Vehicle Suspension Ride and Handling Performance". In Non-smooth Problems in Vehicle Systems Dynamics, 29–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01356-0_3.

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Yuen, Tey Jing, Ramli Rahizar, Zainul Abidin Mohd Azman, Alias Anuar e Dzakaria Afandi. "Design Optimization of Full Vehicle Suspension Based on Ride and Handling Performance". In Lecture Notes in Electrical Engineering, 75–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33835-9_8.

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Bakar, Saiful Anuar Abu, Ryosuke Masuda, Hiromu Hashimoto, Takeshi Inaba, Hishamuddin Jamaluddin, Roslan Abdul Rahman e Pakharuddin Mohd Samin. "Improving Electric Vehicle Conversion’s Ride and Handling Performance Using Active Suspension System". In Advanced Methods, Techniques, and Applications in Modeling and Simulation, 258–67. Tokyo: Springer Japan, 2012. http://dx.doi.org/10.1007/978-4-431-54216-2_29.

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Belayneh, Nigatu, Ramesh Babu Nallamothu, Anantha Kamal Nallamothu e Seshu Kishan Nallamothu. "Effect of Tyre Inflation Pressure on Fuel Consumption and Vehicle Handling Performance". In Lecture Notes in Mechanical Engineering, 607–17. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0159-0_53.

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Mehrtash, Moein. "Experiential Learning in Vehicle Dynamics Education via a Scaled Experimental Platform: Handling Performance Analysis". In New Realities, Mobile Systems and Applications, 694–702. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96296-8_62.

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Kato, Shinji, e Navid Samadi. "The Power of Oil – Influence of Shock Absorber Oil on Vehicle Ride and Handling Performance". In Proceedings, 105–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-63193-5_8.

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Atti di convegni sul tema "Vehicle handling performance"

Pascali, L., P. Gabrielli e G. Caviasso. "Improving Vehicle Handling and Comfort Performance Using 4WS". In SAE 2003 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2003. http://dx.doi.org/10.4271/2003-01-0961.

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Takekoshi, Kyosuke, Yusuke Udagawa e Taichi Shiiba. "Robust Handling Performance Against Weight Variation for Light Weight Vehicle". In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39200.

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This paper addresses the suitable design parameter for a light weight vehicle to achieve the robust handling performance against the weight variation. Running simulations were conducted to evaluate the effect of the weight variation on the handling performance. The target vehicle was a 5-seater passenger car and its weight was 600 kg. A 3-DOF vehicle model was used with which the rolling motion of a vehicle body during cornering can be considered to verify the relationship between the handling performance, design parameters, and the weight variation of the vehicle. The Magic Formula tire model was used to express the non-linearity of lateral tire forces depending on the vertical tire forces, which vary with the rolling motion of the vehicle. The handling performance was evaluated with steady-state cornering simulations and pulse response simulations.

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Zhu, Jian Jun, Amir Khajepour e Ebrahim Esmailzadeh. "Comparative Study of Turning Performance Between a Vehicle With Planar Suspension Systems and a Conventional Vehicle". In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28745.

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In a conventional vehicle, the vibration caused by road obstacles can not be effectively isolated in the longitudinal direction due to the fact that the longitudinal connections between the chassis and wheels are typically very stiff compared with the vertical connections. To overcome this limitation, a novel concept design of a planar suspension system (PSS) is proposed. The rather stiff longitudinal linkages are replaced by elastic ones in a PSS so that the vibration along any direction in the wheel plane can be effectively isolated. The soft longitudinal connection can change the wheelbase and the vehicle’s weight distribution at the front and rear wheels, and may further change the handling performance. This paper presents a comparative study of the handling behaviour of a PSS vehicle and a similar conventional vehicle in cases of a combining operation between a turning and acceleration, and a turning on a road with pothole. The study demonstrates that the PSS vehicle has the potential to absorb the vibration in the longitudinal direction without sacrificing the handling performance. The handling behaviour of a PSS vehicle is generally comparable with, and under some conditions, even better than that of a conventional vehicle.

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Rengaraj, Chandrasekaran, e David Crolla. "Integrated Chassis Control to Improve Vehicle Handling Dynamics Performance". In SAE 2011 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-01-0958.

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Siegler, Blake, e David Crolla. "Racing Car Simulation and the Virtual Race Track". In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/de-23277.

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Abstract A number of handling models of a small high performance formula type racing car have been produced. These have been used to optimise the performance of the vehicle whilst under going simple manoeuvres and around a complete race track. Recently the vehicle was fitted with a data acquisition system and objective data was taken of the vehicle’s handling performance. The paper details an investigation into the accuracy of two (a simple and more sophisticated) vehicle handling models in predicting the actual vehicle’s performance from the data collected by comparing measured and simulated results. The investigation studies the steady state and transient response of the vehicle up to the limit of the vehicle’s handling performance. A description is also given of the use of the more sophisticated model in a virtual race track simulation where it is used as a development tool to tune the performance of future vehicles.

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Wu, Jianyang, Zhenpo Wang e Junmin Wang. "Influence of Tire Inflation Pressure on Vehicle Dynamics and Handling Performance". In ASME 2019 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/dscc2019-9055.

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Abstract Tire inflation pressure affects both tire longitudinal and lateral stiffness and thus may impose a considerable influence on vehicle dynamics and handling performance. This paper presents a comprehensive study revealing the effects of tire pressure variations and their distribution among four tires on vehicle dynamics and handling performance. An extended Magic Formula tire model and a modified UniTire model involving tire inflation pressure are employed to describe the tire longitudinal and lateral forces, respectively. Two groups of vehicle maneuvers are simulated in CarSim: a single lane change maneuver with braking and a double lane change maneuver, to exhibit the effects of tire inflation pressure. Various tire pressure variations including all four tires at same and different pressures are examined. A vehicle dynamics, lateral motion stability index, and driver steering workload are utilized to quantify the influence of tire pressure variations and distributions. Analyses on the simulation results indicate that: 1) a front tire pressure reduction induces vehicle understeering tendency and a larger steering angle; 2) a rear tire pressure reduction causes oversteering characteristics and a sacrifice on vehicle stability with a larger vehicle sideslip angle; 3) all-tire inflation pressure decrease will increase driver’s steering workload; and 4) lower rear-tire inflation pressure can promote the combined performance of vehicle path-tracking and driver’s steering workload.

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Cui, Zhong-hua, Ru-fu Hu e Hong-wu Ye. "Handling performance for active rear-wheel steering vehicle robust control". In IEEE International Conference on Automation and Logistics (ICAL). IEEE, 2008. http://dx.doi.org/10.1109/ical.2008.4636144.

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Lutfiyanto, Wibowo, Triyono Triyono, Sinki Sinki e Nurul Muhayat. "Handling Performance Investigation on Geometrical Frame of Three Wheels Vehicle". In 2014 International Conference on Physics and its Applications. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icopia-14.2015.20.

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Cui, Jinlong, Yuanzhi Liu, Aibin Wu, Zehui Zhou, Yang Zhao e Qichun Sun. "Intelligent Real-Time 4WD Control Development to Improve Vehicle Traction and Handling Performance". In Vehicle Electrification and Powertrain Diversification Technology Forum Part II. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2022. http://dx.doi.org/10.4271/2022-01-7008.

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Deng, Weiwen, Yong H. Lee e Ming Tian. "An Integrated Chassis Control for Vehicle-Trailer Stability and Handling Performance". In SAE 2004 Automotive Dynamics, Stability & Controls Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-2046.

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Rapporti di organizzazioni sul tema "Vehicle handling performance"

Shoop, Sally, Clifford Witte, Sebastian Karwaczynski, Clifton Ellis, Eoghan Matthews, Steven Bishel, Barry Bomier et al. Improving winter traction for vehicles in northern operations. Engineer Research and Development Center (U.S.), dicembre 2021. http://dx.doi.org/10.21079/11681/42524.

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As part of the campaign to increase readiness in northern regions, a near commercial off-the-shelf (COTS) solution was identified for the High Mobility Multipurpose Wheeled Vehicle (HMMWV); and used to assess the suitability of commercially available winter tires for operational deployment. Initial performance evaluations conducted during the winters of 2020 and 2021 demonstrated and quantified significant improvements to traction and handling on a variety of winter surfaces. User feedback from United States Army Alaska (USARAK) Soldiers confirmed these results in an operational environment. Results of this study provide new winter tire specifications for the Army and justify the procurement of a HMMWV winter tire for improved safety and capability for US Soldier and vehicle fleet needs. The data and Soldier evaluations support attaining a National Stock Number (NSN) and provide data to develop models of winter vehicle performance that include the impact of winter tires and chains. This work also paves the way for future development and procurement of winter tires for vehicles where COTS solutions are unavailable. The motivation is to provide Soldiers with state-of-the-art winter tires to increase safety, capability, and operational compatibility with North Atlantic Treaty Organization (NATO) partners in the European Theater of Operations, and mobility superiority in all environments.

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Hemphill, Jeff. Unsettled Issues in Drive-by-Wire and Automated Driving System Availability. SAE International, gennaio 2022. http://dx.doi.org/10.4271/epr2022002.

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While many observers think that autonomy is right around the corner, there many unsettled issues. One such issue is availability, or how the vehicle behaves in the event of a failure of one of its systems such as those with the latest “by-wire” technologies. Handling of failures at a technical actuation level could involve many aspects, including time of operation after first fault, function/performance after first fault, and exposure after first fault. All of these and other issues are affected by software and electronic and mechanical hardware. Drive-by-wire and Automated Driving System Availability discusses the necessary systems approach required to address these issues. Establishing an industry path forward for these topics will simplify system development and provide a framework for consistent regulation and liability, which is an enabler for the launch of autonomous vehicles.

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A Decision-Making Method for Connected Autonomous Driving Based on Reinforcement Learning. SAE International, dicembre 2020. http://dx.doi.org/10.4271/2020-01-5154.

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At present, with the development of Intelligent Vehicle Infrastructure Cooperative Systems (IVICS), the decision-making for automated vehicle based on connected environment conditions has attracted more attentions. Reliability, efficiency and generalization performance are the basic requirements for the vehicle decision-making system. Therefore, this paper proposed a decision-making method for connected autonomous driving based on Wasserstein Generative Adversarial Nets-Deep Deterministic Policy Gradient (WGAIL-DDPG) algorithm. In which, the key components for reinforcement learning (RL) model, reward function, is designed from the aspect of vehicle serviceability, such as safety, ride comfort and handling stability. To reduce the complexity of the proposed model, an imitation learning strategy is introduced to improve the RL training process. Meanwhile, the model training strategy based on cloud computing effectively solves the problem of insufficient computing resources of the vehicle-mounted system. Test results show that the proposed method can improve the efficiency for RL training process with reliable decision making performance and reveals excellent generalization capability.

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