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Suspension analysis and development of prospective Formula Student racing car
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Vehicle Dynamics.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

For racing the best engine cannot win any race without a very good suspension system. However the best suspension system with a decent engine is a stronger combination. Power without control is useless, so a suspension system is as important. After testing the previous cars with ADAMS software, the first results showed problems and demanded some redesign.

To correct these problems the relation between the wheel movement and the spring movement should be linear. It sounds like a basic problem but it is preferable to have a linear relationship between both two. Otherwise the vehicle will be hard to set up properly and the car could even be unstable when the forces are higher. Hence, the first part of the work has been to focus on the front and rear suspension independently.

Next step consisted of building a full vehicle assembly model to study the influence of other factors for the full vehicle. During a race when the car is going straight the most important components are the engine and tyres (as Formula Student racing car does not reach really high speed aerodynamics is not as important as the other two). However, when tuning the car one of the most important system of the car is the suspension system and how it interacts with the tyres. To improve the suspension performance it will be necessary to pay attention to parameters that influence the stability of the car and the performance concerning maximum lateral acceleration. Better cornering performance will be translated to faster lap time at a race.

The final part of the work was to test the car for other condition and for other manoeuvres, e.g. acceleration out of corner and braking or throttle release into the corner. All these different situations will give the Formula Student team more information about how the car will perform during different situations. To find a suitable setup with the constraints that were given a Design of Experiment (DOE) study was performed, varying suspension points, stiffness of anti-roll bars, camber and toe angles.

Place, publisher, year, edition, pages
2014. , 67 p.
TRITA-AVE, ISSN 1651-7660 ; 2014:39
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-163892OAI: diva2:802594
Available from: 2015-04-13 Created: 2015-04-13 Last updated: 2015-04-13Bibliographically approved

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