Fredrik Bruzelius


Bild på Fredrik Bruzelius

Main interest in the fields of vehicle dynamics control, modelling, simulation and testing.

Utbildning:

1999 MSc Applied Mathematics, Linköping University

2004 PhD Control Theory, Chalmers University of Technology

2014 Docent Vehicle Dynamics, Chalmers University of Technology

Fredriks forskningsresultat


Driver behavior in mixed and virtual reality: a comparative study

This paper presents a comparative study of driving behavior when using different virtual reality modes. Test subjects were exposed to mixed, virtual, and real reality using a head mounted display capable of video see-through, while performing a...

The Importance of Yaw Motion Feedback in Driving Simulators

In hexapod based driving simulator, utilizing one degree of freedom limits the potential in others. Taking into account that improper representation of the yaw motion in the driving simulator can be more harmful then beneficial in terms of the...

Model and Road Surface Sensitivity of Longitudinal Performance Based Standards

Performance-based standards (PBS) is a regulation policy to address the complexity of variations in vehicle combinations. It enables a direct way of addressing certain requirements associated with the safety, environment and road network and their...

A Heavy Vehicle Dynamics Model for Driving Simulators

The aim of the present paper was to develop and validate a heavy vehicle dynamics model for driving simulators. The model was thought to be open, with a high level of readability and flexibility for future understanding, modification and use. A...

Effects of Visual Latency on Vehicle Driving Behavior

Using mixed reality in vehicles provides a potential alternative to using driving simulators when studying driver-vehicle inter- action. However, virtual reality systems introduce latency in the visual system that may alter driving behavior, which,...

Jämförelse av vinter och sommardäck på barmark sommartid: tester, riskanalys och...

Allt fler bilister har ersatt sina dubbade vinterdäck med dubbfria. Eftersom det inte är olagligt att köra med odubbade vinterdäck på sommaren väljer ett stort antal förare att låta vinterdäcken sitta på även sommartid. Syftet med denna studie har...

Estimation of the inertial parameters of vehicles with electric propulsion

More accurate information about the basic vehicle parameters can improve the dynamic control functions of a vehicle. Methods for online estimation of the mass, the rolling resistance, the aerodynamic drag coefficient, the yaw inertia and the...

A theoretical justification of the sine with dwell manoeuvre

The sine with dwell (SWD) manoeuvre has received much attention within the context of vehicle stability testing. This manoeuvre is used in a test developed by the NHTSA, designed to certificate electronic stability control systems in light vehicles....

Prepositioning of driving simulator motion systems

Motion base driving simulators have limited space in which to recreate the motions of the simulated road vehicle. Conventional motion cueing algorithms strive to centre the cabin in the simulator motion envelope to accommodate accelerations in a...

The Importance of Yaw Rotation Centre on the Driver Behaviour

Yaw motion feedback plays an important role for the perception of motion in driving simulators. This paper investigates the momentary rotation points’ importance on the driver behaviour, through a simulator experiment.A double lane change manoeuvre...

A Technical Platform using Augmented Reality for Active Safety Testing

This paper describes the design of a video see-through augmented reality system for active safety testing. The development is explained in detail, with focus on the design considerations for the different subsystems. It is shown that it is possible...

Longitudinal Velocity and Road Slope Estimation in Hybrid Electric Vehicles Employing...

Vehicle speed is one of the important quantities in vehicle dynamics control. Estimation of the slope angle is in turn a necessity for correct dead reckoning from vehicle acceleration. In the present work, estimation of vehicle speed is applied to a...

Validation of a basic combined slip tyre model for use in friction estimation applications

Tyre modelling is an important part of understanding and estimating the tyre-road friction. In this paper a basic steady-state tyre model for the combined-slip case is derived. The model is intended to be used in friction estimations applications,...

Testing Vehicle Performance on Snow Using Sine with Dwell

Measuring and evaluating vehicle and tire performance in winter conditions are highly motivated by accident statistics. The present paper investigates use of the sine with dwell maneuver in this context. Various aspects of winter testing is...

Tire Force Estimation Based on the Recursive Least Square Method Utilizing Wheel Torque...

This study investigates a new tire force estimator based on the recursive least square (RLS) method. Tire force estimation with known driving wheel torque is studied and compared to the case with torque estimation from the internal combustion...

A Basic Vehicle Dynamics Model for Driving Simulators

Driving simulators are a useful research tool in studies of vehicle and transport-related human machine interface. A vital part of the driving simulator is the vehicle dynamics model. In the present paper, such a model is developed. The model...

Augmented and Mixed Reality as a tool for evaluation of Vehicle Active Safety Systems

Even though the realism of driving simulators increases constantly, there is a potential issue with how representative the test is compared to a real life scenario. An alternative to simulators is to present a mixture of real and simulated...

A simple real-time aerodynamic model for vehicles in overtaking situations

Aerodynamic forces and moments play an important role inovertaking situations and affect the trajectory of the involved vehicles. One method of studying these effects and how the driver responds to these is via driving simulator studies. However,...

Realism of overtaking situations in motion based driving simulators

The credibility of the research results of driving simulator studies is highly dependent on the realism that the simulator is capable of producing. A key component is therefore how realistic the driving is perceived by the drivers (test subjects)....

Towards a method for determining maximum oversteer in slippery conditions

Fatal accidents during winter time in Sweden are to a large extent due to vehicle spinning. Therefore, it is crucial to analyse and compare vehicle/tyre performance on slippery roads with respect to oversteering. In this study, a new test method for...

Towards an Indoor Winter Tire Classification Test

From a traffic safety perspective it is highly motivated to define winter tires interms of their performance in icy road conditions. The present definition of winter(snow) tires, introduced in the EU in 2012, is based on packed snow performance.The...

Velocity Planning for a Racing Driver Model

There is limited information found in literature concerning simulation of limit handling capability of a vehicle model using a driver model. Determining the limit handling capabilities can be a valuable tool for development and analysis of vehicle...

Överstyrning på is och snö med olika vinterdäck: metodutveckling och fältstudie

Trafikolyckor vintertid karaktäriseras i högre grad än olyckor sommartid av att föraren tappar kontrollen över fordonet och en sladdsituation uppstår. I en studie av Trafikverket visas att för dödsolyckor som inträffat under vintersäsong så hade...

Final testing protocols

This report is the final document summarizing the inspection and testing protocols of the eVALUE project. It describes principles, inspection protocols and testing protocols for performance testing of ICT-based safety systems. The inspection...

Final report

This report sums up the activities performed during the complete duration of the project from January 2008 until December 2010. Following the motivation for testing and evaluation of active safety functions, the technical development within the...

The importance of tyre grip for the ESC function on icy roads

In this study we have investigated how tyres with different road grip affect the stability of passenger cars equipped with Electronic Stability Control (ESC) systems during winter road conditions. A field test with a double lane change manoeuvre on...

Test report

This report is the document summarising the testing experience and knowledge gained from the physical testing activities within the eVALUE project. The document contains brief introductions to the testing scenarios as well as short summaries of...

Specifications list

eVALUE is addressing active safety functions and their capability to perform through two courses of action: defining and quantifying the requirements of a safety function under a relevant traffic accident scenario and developing the testing and...

Evaluation of Tire to Road Friction Estimators, Test Methods and Metrics

The tyre to road contact friction is one of the most important properties when it comes to manoeuvrability of ground vehicles and information, to driver and vehicle, is of vital importance in critical situations. Different characteristics of...

Concepts definition


A pilot evaluation of using large movement driving simulator experiments to study driver...

The evaluation of active safety functions like Electronic Stability Control (ESC) is of increasing importance, driven by legislation, to commercial heavy vehicle producers and to society as a whole to predict the potential benefits of the systems....

A pilot evaluation of using large movement driving simulator experiments to study driver...

The evaluation of active safety functions like Electronic Stability Control (ESC) is of increasing importance, driven by legislation, to commercial heavy vehicle producers and to society as a whole to predict the potential benefits of the systems....

Experimental Validation of the Brush Tire Model

The paper contains an experimental validation of the physically based brush-tire model toward the tire behavior in a number of different realistic conditions. Results of measurements performed with summer, winter, and studded tires on different road...