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Investigation of Steering Feedback Control Strategies for Steer-by-Wire Concept
Linköping University, Department of Electrical Engineering, Automatic Control.
Linköping University, Department of Electrical Engineering, Automatic Control.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The automotive industry is currently undergoing a paradigm shift. One such example in the next generation steering is the Steer-by-Wire (SbW) technology. SbW comes with a lot of advantages but one of the big challenges is to provide the driver with a realistic steering feel. More precisely, steering feel can be defined as the relationships between the steering wheel torque, the steering wheel angle and the dynamics of the vehicle.

Accordingly, the first contribution of this work will be to present transfer functions between these quantities that resemble those observed in traditional steering systems. The steering feel/feedback is then achieved by an electric motor which can be controlled by different control strategies. In this thesis three different control strategies are investigated.

The first straightforward strategy is called open loop since there is no feedback controller in the system. The second strategy is torque feedback control and the third strategy is angle feedback control. All three systems are evaluated in terms of reference tracking, stability, robustness and sensitivity. Here reference tracking is defined as tracking a desired transfer function. The desired transfer function is denoted as the reference generator.

When fulfilling the requirements the analysis shows that the torque feedback system has a better reference tracking than the other evaluated systems. It is also concluded that the open loop system has a compromised reference tracking compared to the torque and angle feedback systems.

Since the SbW technology is still an undergoing area of research within the automotive sector this work can be used as a basis for choice of control strategy for steering feedback systems and also as a guideline for future hardware choices.

Place, publisher, year, edition, pages
2018. , p. 56
Keywords [en]
Steering Feedback, Force Feedback, Steer-by-Wire, SbW, Control Strategies, Feedback Control
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-148606ISRN: LiTH-ISY-EX--18/5154--SEOAI: oai:DiVA.org:liu-148606DiVA, id: diva2:1218698
External cooperation
Volvo Cars Corporation
Subject / course
Automatic Control
Presentation
2018-06-12, Transformen, Linköping, 13:00 (Swedish)
Supervisors
Examiners
Available from: 2018-06-15 Created: 2018-06-14 Last updated: 2018-06-15Bibliographically approved

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CiteExportLink to record
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