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Publications related to Vehicle Dynamics (10,000)
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Article
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Vehicle mass is an important parameter for motion control of intelligent vehicles, but is hard to directly measure using normal sensors. Therefore, accurate estimation of vehicle mass becomes crucial. In this paper, a vehicle mass estimation method based on fusion of machine learning and vehicle dynamic model is introduced. In machine learning meth...
Article
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Dynamic vehicle weight measuring, weigh-in-motion (WIM), is an important metric that can reflect significantly vehicle driving behaviour and in turn, it will affect both safety and traffic status. Several accurate WIM systems are developed and implemented successfully. These systems are using under road weighing sensor which are costly to implement...
Article
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In electric vehicle applications, the torque density of electric motor plays an important role in improving the performance of the vehicle. The main objective of this paper is to investigate a possible method for improving the torque density of a permanent magnet synchronous motor used in electric vehicles. At the same time, other machine specifica...
Article
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A new methodology for constructing stability maps (phase-plane analysis) is presented and validated for application to complex multibody vehicle models implemented in Multibody Dynamics simulation software (Adams®). Traditional methodologies are developed to be applied to explicit mathematical models. Given the complexity of some special multibody...
Article
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Autonomous vehicles (AVs) are becoming increasingly popular, and this can potentially affect road performance. Road performance also influences driving comfort and safety for AVs. In this study, the influence of changes in traffic volume and wheel track distribution caused by AVs on the rutting distress of asphalt pavement was investigated through...
Article
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Autonomous vehicles require safe motion planning in uncertain environments, which are largely caused by surrounding vehicles. In this paper, a driving environment uncertainty-aware motion planning framework is proposed to lower the risk of position uncertainty of surrounding vehicles with considering the risk of rollover. First, a 4-degree of freed...
Article
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Wheel wear is one of the most critical factors affecting the vehicle performances and maintenance costs of railway vehicles. However, previous research has to ignore the initial wheel-rail profiles for the evolution of wheel wear. Therefore, this work investigates the relationship between the evolution of wheel wear corresponding to different initi...
Article
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The so-called porpoising is a well-known problem similar to bouncing that is affecting the dynamic behavior of basically all the field of 2022 Formula 1 racing cars. It is due to the extreme sensitivity of aerodynamic loads to ride height variations along a lap. Mid-way through the season race engineers are still struggling to cope with this phenom...
Article
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Nonholonomic models of automobiles are developed by utilizing tools of analytical mechanics, in particular the Appellian approach that allows one to describe the vehicle dynamics with minimum number of time-dependent state variables. The models are categorized based on how they represent the wheel-ground contact, whether they incorporate the longit...
Article
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Under the dual−carbon goal, the research on energy conservation and emission reduction of new energy vehicles has once again become a current hotspot, and plug−in hybrid electric vehicles (PHEVs) are the first to bear the brunt. In order to improve the fuel economy of PHEV, an adaptive energy management strategy is designed on the basis of the inte...
Preprint
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As one of the key technologies of the train, the braking system plays a vital role in ensuring the safe operation of the train. Plate braking has the characteristics that the higher the train speed, the better the braking effect, and it can be used as one of the options for emergency braking of the high-speed train. The dynamic grid technology is u...
Article
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Facing the challenge that the single-motor electric drive powertrain cannot meet the continuous uphill requirements in the cold mountainous area of the 2022 Beijing Winter Olympics, the manuscript adopted a dual-motor coupling technology. Then, according to the operating characteristics and performance indicators of the fuel cell (FC)–traction batt...
Preprint
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In vehicle dynamics control, engineering a suitable regulator is a long and costly process. The starting point is usually the design of a nominal controller based on a simple controloriented model and its testing on a full-fledged simulator. Then, many driving hours are required during the End-of-Line (EoL) tuning phase to calibrate the controller...
Conference Paper
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Conventional methods for launch vehicle estimation and control are performed primarily using quaternions and dual quaternions, which outperform Euler angles since quaternions have no singularities yet exhibit the disadvantage of non-uniqueness. Launch vehicle dynamics and control also contain noisy attitude measurements yet precise position and vel...
Article
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The main aim of this study was to develop a method for assessing the level of robustness of timetabled transport performance in rail transport. When the railway lines are supplied by DC networks, lower voltages are observed, and consequently, current values are often ten times higher than in AC networks. This is an operational problem, as high curr...
Article
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This paper presents a new nonlinear observer-based method to detect the faults of both steering and torque actuators of autonomous ground vehicles. To this end, the nonlinear vehicle system is reformulated in a Takagi-Sugeno (TS) fuzzy model with both measured and unmeasured nonlinear consequents, called N-TS fuzzy model. Differently from the class...
Article
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This paper focuses on a distributed adaptive singularity-free fixed-time neural network tracking control problem for vehicular platoon with model uncertainties. The reference trajectory of platoon is modeled based on the actual driving conditions including four stages. Moreover, the adaptive neural network and \(H_\infty \) control theory are adopt...
Article
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This manuscript focuses on the theoretical advancement of causality between entry vehicle dynamics and roundabout capacity modeling, with a merging state transition-based analytical approximation and calibration approach. Gap acceptance models, such as the HCM model, usually ignore roundabout specific operating conditions, whereas empirical models...
Thesis
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In the advent of automated driving, numerous system architectures to reach this goal are currently being developed. In this process, safety and modularity criteria are becoming increasingly important. This opens up new opportunities in the system design, but also creates new challenges. All functions or services in an automated vehicle are affected...
Article
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The WLTP Class 3 driving cycle is used in this article for the design of a battery and super-capacitor for electric vehicles. The energy demand for electric vehicle is calculated using WLTP drive cycle and the total power required for electric vehicle is calculated by calculating tractive force. A hybrid energy storage system (HESS) overcomes numer...
Article
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The development of numerical models able to compute the wheel and rail profile wear is essential to improve the scheduling of maintenance operations required to restore the original profile shapes. This work surveys the main numerical models in the literature for the evaluation of the uniform wear of wheel and rail profiles. The standard structure...
Article
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Long-term vehicular motion prediction is a crucial function for both autonomous driving and advanced driver-assistant systems. However, due to the uncertainties of vehicle dynamics and complexities of surroundings, long-term motion prediction is never trivial work. As they combine effects of humans, vehicles and environments, kinematic trajectory d...
Article
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In the research of cooperative adaptive cruise control, the coupling relationship between the communication delay, the following time headway, and the string stability leads to a stringent limit on the minimum allowable following time headway. To deal with this limitation, this paper proposes the Disturbance Observer-Smith Predictor Compensation (D...
Article
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A cooperative adaptive cruise control (CACC) system may be impeded by slow-moving traffic in the application. To improve the mobility of CACC, this research proposes a CACC controller with successive platoon lane-change capability. The goal is to help a platoon cut through traffic successively like a snake via smaller windows. The proposed controll...
Article
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Tires play a critical role in vehicle safety. Proper modeling of tire-road interaction is essential for optimal performance of active safety systems. This work studies the influence of temperature , longitudinal vehicle speed, steering frequency, vertical load, and inflation pressure on lateral tire dynamics. To this end, a tire test bench that all...
Article
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For parallel hybrid electric vehicles (HEVs), the clutch serves as a vital enabling actuator element during mode transitions. The expected drivability and smoothness of parallel HEVs are difficult to be achieve owing to the neglect of clutch-torque-induced disturbance and different response characteristics of power sources during clutch slipping. T...
Article
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Suspension plays a dominant role in vehicle dynamics and vibration control in automobiles. This work defines a new method to create the passive suspension system of seven degrees of freedom full car, having both linear and nonlinear rate springs. Models are developed using MATLAB/Simulink’s Simscape environment and differentiated using linear and n...
Article
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Bench test conducted on the roller rig is one of the important measures to simulate the dynamic performance of railway vehicles. The test results on Full-vehicle roller rig (FVRR) are closer to the reality, but the construction cost is huge. Therefore, to reduce the cost of the roller rig, a Half-vehicle roller rig (HVRR) is proposed and the test m...
Preprint
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The purpose of this project work is to run the detailed vehicle dynamic simulations (using nominal and measured profiles), including curving performance and vehicle stability using Universal Mechanism (UM) software. In this project, we measured wheel and rail profiles from the (VTI) lab at SFU in the school of sustainable energy engineering. Then,...
Article
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A path following control strategy for a four-wheel-independent-drive electrical vehicle (4WID-EV) based on backstepping and model predictive control is presented, which can ensure the accuracy of path following and maintain vehicle stability simultaneously. Firstly, a 2-DOF vehicle dynamic model and a path following error model are built and the de...
Chapter
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Performance, development and validation of vehicle dynamics applications such as anti-lock braking systems (ABS) or indirect tyre pressure monitoring systems (iTPMS) rely on a sufficiently accurate consideration of tyre properties such as transient dynamics and tyre kinematics. Previous investigations showed that the tyre rotation has a distinct ef...
Article
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When designing and constructing automobiles, vehicle dynamics control systems are among the most important aspects to consider. The planar model of the vehicle is the most important model used in vehicle control system research. This paper illustrates grey-box nonlinear vehicle dynamics modeling. Various advanced automobile features (such as Electr...
Article
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The construction of roads along rivers plays a crucial role in the construction of economic belts and social and economic development along rivers. Roadbeds are the foundation of highway construction, while the soft soil foundation is widely distributed on both sides of rivers, resulting in some difficulties for roadbed construction and highway use...
Article
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For the vehicle-to-grid system, the dynamic performance of the vehicle in the transportation system is quite crucial. The stability of the vehicle is the basis of the whole system. Compared to the traditional vehicle, the vehicle with a torque distribution system allows the vehicle to have a better dynamic performance. The torque distribution metho...
Article
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The optimal design of a super highspeed flywheel rotor could improve flywheel battery energy density. The improvement of flywheel battery energy density could enhance the performance of the flywheel lithium battery composite energy storage system. However, there are still many problems in the structure, material and flywheel winding of super highsp...
Article
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In this paper, a linear time-varying model predictive controller (LTV-MPC) is proposed for automated vehicle path-following applications. In the field of path following, the application of nonlinear MPCs is becoming more common; however, the major disadvantage of this algorithm is the high computational cost. During this research, the authors propo...
Article
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Vehicles are an important source of air pollutants and greenhouse gases. Their emissions have been controlled since the 1970s by laboratory tests but there are often found divergences to real-world emissions. Real driving emissions procedure is in implementation in many countries, for evaluating vehicles closer to actual operation. In order to redu...
Article
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To improve the multidirectional motion control accuracy and driving stability of Distributed Drive Autonomous Vehicles (DDAVs) under extreme conditions, the extreme speed estimation method based on dynamic boundary and the multidirectional motion coupling control law design method based on multi degrees of freedom vehicle dynamic model are proposed...
Article
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This article deals with methods and measurements related to environmental pollution and analysis of particle distribution in urban and suburban landscapes. Therefore, an already-invented sampling method for tyre road wear particles (TRWP) was used to capture online emission factors from the road. The collected particles were analysed according to t...
Article
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Appropriate overtaking can improve the safety and efficiency of driving. Practically, overtaking consists of two asymmetric lane‐changes: firstly to the left lane and then return back. Existing literatures treated the two lane‐changes as the same behaviour, which may result in frequent and unnecessary lane‐changes. For the more complex first lane‐c...
Article
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Planning the optimal trajectory of emergency avoidance maneuvers for highly automated vehicles is a complex task with many challenges. The algorithm needs to decrease accident risk by reducing the severity and keeping the car in a controllable state. Optimal trajectory generation considering all aspects of vehicle and environment dynamics is numeri...
Article
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Studies of active matter—systems consisting of individuals or ensembles of internally driven and damped locomotors—are of interest to physicists studying nonequilibrium dynamics, biologists interested in individuals and swarm locomotion, and engineers designing robot controllers. While principles governing active systems on hard ground or within fl...
Preprint
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This paper describes resilient navigation and planning algorithm for high-speed autonomous race, Indy Autonomous Challenge (IAC). The IAC is a competition with full-scale autonomous race car that can drive up to 290 km/h(180mph). Due to its high-speed and heavy vibration of the race car, GPS/INS system is prone to be degraded. These degraded GPS me...
Article
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The unsuitably designed powertrain mount may cause jittering and shrugging during the starting and shifting processes of the vehicle, which seriously affects the comfort of using the vehicle. However, the influence of mounts on vehicles has been neglected in previous studies. In view of the above problems, this study establishes a DCT vehicle coupl...
Article
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The future motion prediction of vehicles in the front is widely valued for its great potential to improve a vehicle’s safety, fuel consumption, and efficiency. However, due to the uncertainty of a driver’s driving intentions and vehicle dynamics, future motion prediction faces great challenges. In order to break the bottleneck in the prediction of...
Article
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To summarize the driving adaptability of intelligent vehicles to as-built roadway infrastructures, i.e., the readiness of as-built roadway infrastructures for intelligent vehicles driving, the definition of disconnected intelligent vehicles and the classification of driving automation levels were clarified. On this basis, the differences in human v...
Article
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High-speed maglev trains are subjected to severe dynamic loads, thus posing a failure hazard. It is necessary to introduce the vehicle dynamics to improve the structural strength and fatigue life assessment approach under harsh routes and super high-speed grades. As the most critical load-carrying part between the vehicle body and levitation frames...
Article
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This paper presents a novel holistic T-shape roundabout coordination system (TCS) that addresses the connected and automated vehicles (CAVs) flow in a typically isolated T-shape roundabout. The TCS optimizes the states of each approaching vehicle in a receding horizon control framework that aims to minimize the total crossing time, considering the...
Conference Paper
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Virtual testing procedures have become a standard in vehicle dynamics. The increasing complexity of driver assistance systems demand for more and more virtual tests, which are supposed to produce reliable results even in the limit range. As a consequence, simplified vehicle models, like the classical bicycle model or 4-wheel vehicle models, have to...
Preprint
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This paper presents an approach to a go-kart chassis design, vehicle dynamics calculation, Li-ion battery capacity analysis, and electric motor choice for optimized vehicle performance. The chassis analysis shown in this paper was performed by a CAD/FEA software package, SolidWorks. Three highlights can be found in this paper: 1) an original design...
Conference Paper
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Lane changing (LC) is a typical driving task of connected and autonomous vehicles (CAV). In a typical LC event, CAV need to follow certain trajectory and enters the gap at target lane. While there exists many LC planning models, gap feasibility, which should be a preposition stage of LC planning, is rarely investigated. Furthermore, if the neighbor...
Article
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This course has been developed for engineers involved in all fields related to the design or development of vehicle dynamics, vehicle braking systems, powertrain systems, chassis systems, or suspension systems. In addition, this course can be valuable to those with component design responsibilities in brake, chassis, suspension, or tire disciplines...
Article
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When dealing with customers, original equipment manufacturers (OEMs) classify vehicular usage by resorting to simplified, often colloquial, descriptions that allow for a rough understanding of the operating conditions and the user's needs. In this way, the information retrieved from the customers is exploited to guide their choices in terms of vehi...
Article
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This research presents a finite element multi-physics design methodology that can be used to develop and optimise the inherent functions and geometry of an innovative regenerative eddy current (REC) damper for the suspension of B class vehicles. This methodology was inspired by a previous work which has been applied successfully for the development...
Article
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This paper presents an in-depth study and analysis of the AC drive control simulation of a supercapacitor tram using a high-order neural network pattern discrimination algorithm. Firstly, the line conditions and shunting locomotive operation conditions of a freight coal loading station are analyzed, the capacity of the onboard supercapacitor energy...