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Due to the special characteristics of the wheel force transducer (WFT), the traditional methods are hard to acquire the initial values of the WFT precisely and conveniently. Aiming at the problem, two online calculation methods for the initial value are proposed in this paper. The key of these methods is that the two proposed methods convert the problem of solving the initial values to an optimization...
If the anti-slip regulation function can be attached to the conventional automatic transmission control system, the vehicle's tractive ability, steering capability and driving stability on the low friction road will all be improved greatly with very low additional hardware costs. Therefore, the extension of anti-slip regulation function on the automatic transmission control system has an important...
In this study, a collision avoidance method with model predictive control is proposed for a nonlinear model of a four-wheeled vehicle. We consider an unavoidable region (UR), which is constructed as the region in which the vehicle cannot avoid an obstacle owing to physical limitations. Even if the distance between the vehicle and the obstacle is short, the vehicle is directed by the nonlinear model...
The paper is concerned with a vehicle where each front wheel is equipped with a steering equipment. Aim of the paper is to analyze the behavior of the resulting driving apparatus during the steering maneuver in order to subsequently develop a suitable control system. The analysis is carried out in two stages, termed kinematic and dynamic. The kinematic analysis describes the steering maneuver when...
In this study, a collision avoidance method with model predictive control is proposed for a nonlinear model of a four-wheeled vehicle. The C/GMRES algorithm is used for solving the nonlinear model predictive control (NMPC) problem within a short sampling period. A nonlinear tire model is employed to represent the realistic behavior of a vehicle. Here, to consider whether it is possible to avoid an...
Using vehicle dynamics, in this paper an automotive ABS control algorithms, which adaptive to the adhesive coefficient of road surface was proposed. And also an ABS experiment bench was explored. Simulation and experiment studies results show that this ABS system can control the wheel slip well and the control effect is good, it provides an effective method of ABS research.
This paper proposes anti-lock braking system to integrate with active suspensions system applied in a quarter vehicles model, and can use a road estimate to get the road condition. This estimate is based on the LuGre friction model with a road condition parameter, and can transmit a reference slip ration to slip ratio controller through a mapping function considering the effect of road characteristics...
In this paper we introduce a visualization application for a vehicle simulation with an automatic pilot. The application is written in OpenGL and includes a model of a vehicle (a motorcycle) based on the physical laws of motion, including kinematics, gravitation, and friction. The vehicle can be controlled by the user through keyboard and mouse commands, as well as by an automatic pilot. The latter...
This paper deals with the synthesis of an optimal yet practical finite preview controller for a semi-active dissipative suspension system based on a two - degree - of - freedom (2-DOF) vehicle model. The proposed controller utilises knowledge about approaching road disturbances obtained from preview sensors to minimise the effect of these disturbances. A truly optimal control law, which minimises...
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