Tímea Fülep

21742321900

Publications - 6

Robust reconfigurable control for in-wheel electric vehicles

Tímea Fülep András Mihály Zoltán Szabó Péter Gáspár Ferenc Szauter J. Bokor

Publication Name: IFAC Papersonline

Publication Date: 2015-09-01

Volume: 28

Issue: 21

Page Range: 36-41

Description:

The paper presents a fault tolerant reconfigurable control method for vehicles driven by four in-wheel electric motors and a steering system. The aim of the design is to realize robust velocity and road trajectory tracking even under challenging driving conditions or actuator failures. The vehicle is operated solely with the in-wheel motors, thus steering intervention is only applied in case of skidding or a failure of an electric motor. The reconfigurable control is realized based on Linear Parameter Varying (LPV) framework, using the specific characteristics of the in-wheel motors of fast and accurate torque control. The operation of the designed control system is demonstrated in a CarSim simulation environment.

Open Access: Yes

DOI: 10.1016/j.ifacol.2015.09.501

Hierarchical robust control for in-wheel motor vehicles

Tímea Fülep Péter Gáspár András Mihály Zoltán Szabó Ferenc Szauter J. Bokor

Publication Name: Proceedings of the Mini Conference on Vehicle System Dynamics Identification and Anomalies

Publication Date: 2014-01-01

Volume: 2014-January

Issue: Unknown

Page Range: 71-81

Description:

The paper proposes the design of an integrated vehicle control system for in-wheel electric vehicle, which is able to track road geometry with a predefined reference velocity. In the design the lateral and longitudinal dynamics are combined using the in-wheel motors and the steering system. The design methodology of the hierarchical control is proposed. The required control signals are calculated by applying high-level controllers, which are designed using a robust control method. For the control design the model is augmented with weighting functions specified by the performance demands. The actuators generating the necessary control signals in order to achieve the requirements for which low-level tracking controllers are designed.

Open Access: Yes

DOI: DOI not available

Robust reconfigurable control for in-wheel motor vehicles

Tímea Fülep Péter Gáspár András Mihály Zoltán Szabó Ferenc Szauter J. Bokor

Publication Name: 2014 IEEE International Electric Vehicle Conference Ievc 2014

Publication Date: 2014-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The paper deals with reconfigurable control of in-wheel electric vehicles. Basically the vehicle is controlled alone by the four electric engines mounted in the wheels of the vehicle. The goal is to design a control system with velocity and trajectory tracking ability realized by separate torque generation of the in-wheel motors. In critical driving situations when the yaw moment cannot be established with the four in-wheel engine alone, the high-level controller reconfigures the actuator inputs, thus steering intervention helps to stabilize the vehicle. Moreover, a multi-layer supervisory architecture for integrated control systems is also proposed. The operation of the vehicle is illustrated through a CarSim simulation example.

Open Access: Yes

DOI: 10.1109/IEVC.2014.7056232

Reliability in automotive engineering by fuzzy rule-based FMEA

Tímea Fülep László Pokorádi

Publication Name: Lecture Notes in Electrical Engineering

Publication Date: 2013-01-01

Volume: 197 LNEE

Issue: VOL. 9

Page Range: 793-800

Description:

The Failure Modes and Effects Analysis (FMEA) is a reliability estimation method intended to identify potential failures which have significant consequences affecting the system performance. In a Failure Modes and Effects Analysis the Probability of Failure (PoF), Consequence of Failure (CoF) and Detectability of Failure (DoF) may be determined using engineering judgment and/or based mathematical models, where the result is expressed in a term. The terms qualities and quantities are sometimes used to distinguish these methods. The fuzzy FMEA is a quantitative method of reliability or risk analysis which involves the study of the failure modes can occur in every part of an integrated system. The aim of this paper is to show the possibility of use of fuzzy set theory to estimate failure criticality level theoretically and practically by exemplification of case study of process' risk assessment. © Springer-Verlag 2013.

Open Access: Yes

DOI: 10.1007/978-3-642-33805-2_64

Application of design tools in carbody construction harmonizing shape and dynamical load

Tímea Fülep Péter Harth

Publication Name: Proceedings of the Mini Conference on Vehicle System Dynamics Identification and Anomalies

Publication Date: 2012-01-01

Volume: 2012-November

Issue: Unknown

Page Range: 379-386

Description:

There are two main areas highlighted in the paper concerning car body manufacturing: construction and design work or in other words functionality and aesthetics. The question is to be answered: Which is more important? The solution is untying this quasi contradiction, but it is not an easy task. The ergonomical and aesthetical demands are not unambiguous; they depend also on weather conditions, different anthropometrics, changeable conditions during operation, attitudes, traditions, mentalities, local and actual trends etc. Nowadays the external and internal design does not belong to the main constructor or automotive engineer. The major original equipment manufacturers (OEM) charge special designers to do such work similarly to the separated engine, axles, brake system, electric network design. Nevertheless there are many details that must fit together in the vehicle. As long as the different engineering interests can be harmonized in a rational way, in aesthetical and design questions tastes can be decisive beside rationality. This makes the decisions difficult. The GIST of the cooperation is that future automotive engineers must know the designer's way of thinking at least the main stream in order to consider and make good decisions.

Open Access: Yes

DOI: DOI not available

Integrated robust control design for in-wheel-motor vehicles

Tímea Fülep Zoltán Szabó Péter Gáspár Mihály András Ferenc Szauter J. Bokor

Publication Name: Fisita 2014 World Automotive Congress Proceedings

Publication Date: 2014-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The paper proposes a multi-layer supervisory architecture for integrated control systems in road vehicles. The role of the supervisor is to coordinate active control components and provide priority among them. The supervisor has information about the current operational mode of the vehicle and it is able to make decisions about the necessary interventions into the vehicle components and guarantee the reconfigurable operation of the vehicle. The decisions of the supervisor are propagated to the lower layers through predefined interfaces encoded as suitable scheduling signals. The contribution of the paper is the application of the LPV methodology in a design case study in which an integrated control of four wheel independently-actuated electric vehicle with active steering system is developed.

Open Access: Yes

DOI: DOI not available