Vehicle Dynamics Modeling During Moving Along a Curved Path. Mathematical Model Usage on Studying the Robust Stability (original) (raw)
Related papers
Vehicle Stability Study on Curved Trajectory
University" …, 2008
A subject of comprehensive experimental study is the movement on a curved path, due to the higher danger in such a motion. Moving on a curved trajectory is strictly determined by the interaction between the rolling surface and the tyres of the vehicle. More precisely, by ...
Precursors of Instability for a Vehicle Traveling in Curve
International Review on Modelling and Simulations (IREMOS)
Nowadays, the automotive field takes care of human safety in the everyday driving. In this sense, the vehicle dynamics control systems and ADAS (Advanced Driver Assistance System) play a crucial role for both active and passive safety. In terms of handling, the critical issues for the everyday driver are during braking or steering maneuvers: the main idea of this paper is to investigate the possibility to recognize some critical behaviors leading to vehicle instability, using only the wheel sensors signals, already available as mandatory in actual passenger car (in particular for ABS). In order to do this, a seven degrees of freedom model of a vehicle that runs in a curve with constant longitudinal speed is formulated. With no particular reference to the power unit (IC motor or electrical motors), three different traction schemes configurations are considered. The numerical solutions of the model are analyzed to evaluate their stability, the associated modal shapes and the modal participation factors. A systematic analysis allows recognizing some vehicle behaviors that may constitute instability precursors useful to develop a suitable control logic. Results provided by both a standard vehicle dynamics simulation software and a "on-road" test are presented and discussed to verify the actual feasibility of the proposed precursors employment.
Vehicle dynamics and tire models: An overview
World Journal of Advanced Research and Reviews, 2021
Stability control system plays a significant role in vehicle dynamics to improve the vehicle handling and achieve better stability performance. In order to study and evaluate the performance of the vehicles in addition to how to control it, it is necessary to identify obtain some models related to the dynamics of the vehicle as well as the tire models. This paper presents fundamentals of vehicle dynamics by introducing vehicle models and tire model, which have been widely adopted for vehicle motion control. This helps to get a basic idea of what parameters and states of a vehicle are important in vehicle motion control. This work is separated into four sections: vehicle planar model, full vehicle model, two degrees of freedom vehicle model (bicycle model) to design the controller, and wheel dynamic model.
International Journal of Engineering Technologies and Management Research, 2020
Road security has become with time a topic of concern in our society as per the increasing number of accidents and deaths occurring on the highways. Regulatory experts on road users have constantly been working for ways to solve this problem and thence better the lives of the citizens. This paper is aimed at proposing a mathematical model integrating specific parameters, describing the dynamic lateral behavior of a vehicle's tire and chassis systems and enabling to state a relationship between road characteristics and vehicle dynamics. To achieve this, we made used of the fundamental theorems of dynamics for the modeling of the vehicle's suspended and non-suspended masses and load transfers, then we associated this with the Pacejka Tire model to obtain a complete vehicle model. After the particularization of a global model, a simulator was realized named "DYNAUTO SIMULATOR" which iterates the given variables to produce a consistent result. After an experimental research made on the Ndokoti-PK 24 road section we could, thanks to our simulator determine the maximum speed to have at every turn of this road section and also understand the effect of the modification of a vehicle's center of gravity on its stability. This work will be an important tool which can be recommended to the regulatory board as a major asset in the road construction policy and also in the improvement of road safety measures.
Journal of KONES, 2017
The use of physical models of vehicles, at a scale allows them to be used when measuring the behavior of the full-size vehicles. The characteristics of the various systems and their impact on the dynamics of motion of the vehicle can be determined during stand tests or simulation and confirmed during testing of vehicles on test tracks. Testing vehicles built in small series, oversized or performed individually are conducted infrequently or not at all. In such cases, the alternative may be conducting tests of vehicles carried out at a scale. Research may be conducted in the boundary conditions (which could lead to loss of stability or overturning of the vehicle) impossible to achieve during testing of actual vehicles. They are particularly useful for assessing the stability of vehicles, the impact of the solutions or actions of a driver assistance system. Conducting research vehicles at a scale for the assessment of full-size vehicle must meet the criteria of similarity in the study ...
Dynamic modeling and handling study of a two-wheeled vehicle on a curved track
Mechanics & Industry, 2017
This paper aims to evaluate the handling performance of a two-wheeled vehicle (TWV) during the circulation on a curved track. The TWV model is considered as an assembly of six rigid bodies with 11 degrees of freedom. It is modeled using a robotic approach and it includes a tire dynamic model based on the Magic Formula. The process of evaluation is done using some handling indices in order to quantify the efficiency with which the riders can handle the TWV. Three maneuvers were considered for testing the developed model: U-turn, lane change and steady state turn. Simulations were carried out using a state feedback controller to design a reference trajectory tracking. The response of the proposed model is validated by using the simulation software ADAMS/View. The developed model is also used to study the influences of some design parameters on the handling proprieties of the TWV. The results show that the proposed model is adequate for handling tests. It can be used, as a simulation tool, to test and validate a model during the design phase.
Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering
This paper presents a comparison of the characteristics of the tyres of a full-size vehicle with the tyres of a physical model scaled 1:5. This is a continuation of studies on the use of a scaled vehicle to test the stability of a vehicle. The results presented are based on analysis of a scaled vehicle and a full-size vehicle on a stand and during road tests. Tests were carried out involving manoeuvres based on the ISO standard. The effects of the differences in the construction of the tyres of the scaled vehicle and their impact on the tyre characteristics and its behaviour during testing were compared. This paper presents the results of a comparison of selected parameters of motion for a real vehicle and for a mobile scale model. These tests allowed a statement to be made about the suitability of the used tyres and the entire physical model for lateral stability analysis of a full-size vehicle.
Assessment of Tire Features for Modeling Vehicle Stability in Case of Vertical Road Excitation
Applied Sciences, 2021
Two trends could be observed in the evolution of road transport. First, with the traffic becoming increasingly intensive, the motor road infrastructure is developed; more advanced, greater quality, and more durable materials are used; and pavement laying and repair techniques are improved continuously. The continued growth in the number of vehicles on the road is accompanied by the ongoing improvement of the vehicle design with the view towards greater vehicle controllability as the key traffic safety factor. The change has covered a series of vehicle systems. The tire structure and materials used are subject to continuous improvements in order to provide the maximum possible grip with the road pavement. New solutions in the improvement of the suspension and driving systems are explored. Nonetheless, inevitable controversies have been encountered, primarily, in the efforts to combine riding comfort and vehicle controllability. Practice shows that these systems perform to a satisfact...