Trajectory control of vehicles during a tyre blowout: A simulation study
In this paper, the experiment of trajectory control of vehicle during a tyre blowout is carried out. Firstly, the evaluation criteria of motion vehicles during a tyre blowout are determined. Then, motion vehicle with a static PID controller in highway is discussed. Simulation results show that the static PID controller determined at a certain speed is not fit for the other speed as well. Instead, a gain scheduling PID controller is adopted to handle the trajectory control problem of vehicles during a tyre blowout, where parameters of the gain-scheduling PID controller are calibrated with the varying speed. It shows that the vehicle can avoid yawing as well as keep the driving stability during the tyre blowout, and drive back to the original path after a small offset.
3-Dimensional Simulation of Vehicle Response to Tire Blow-outs
Sudden tire deflation, or blow-out, is sometimes cited as the cause of a crash. Safety researchers have previously attempted to study the loss of vehicle control resulting from a blow-out with some success using computer simulation. However, the simplified models used in these studies did little to expose the true transient nature of the handling problem created by a blown tire. New developments in vehicle simulation technology have made possible the detailed analysis of transient vehicle behaviour during and after a blow-out. This paper presents the results of an experimental blow-out study with a comparison to computer simulations. In the experiments, a vehicle was driven under steady state conditions and a blow-out was induced at the right rear tire. Various driver steering and braking inputs were attempted, and the vehicle response was recorded. These events were then simulated using Engineering Dynamics Vehicle Simulation Model (EDVSM). A comparison between experimental and simulated results is presented. The research was extended by simulating blow-outs at other wheel locations, and observing how various driver inputs affect the vehicle's response. (A) For the covering abstract of the publication see IRRD E200601.
An Overview of the HVE Vehicle Model
Developers of vehicle dynamics simulation software inherently use a mathematical/physical model to represent the vehicle. This paper describes a pre-programmed, object oriented vehicle model for use in vehicle dynamics simulations. This vehicle model is included as part of an integrated simulation environment, called HVE (Human-Vehicle-Environment), described in previous research. The current paper first provides a general overview of the HVE user and development environments, and then provides detailed specifications for the HVE Vehicle Model. These specifications include definitions for model parameters (supported vehicle types; vehicle properties, such as dimensions, inertias, suspensions; tire properties, such as dimensions and inertias, mu vs slip, cornering and camber stiffnesses; driver control systems, such as engine, transmission/differential, brakes and steering; restraint systems, such as belts and airbags). The paper also provides detailed specification of the HVE time-dependent vehicle output group parameters (kinematics, kinetics, tire data, wheel data, inter-vehicle connections, drivetrain, driver controls, contact surface forces, and restraint system forces). (A)