Hello forum. I’m fairly new to FSAE and suspension design. One of the overwhelming problems that I’m having is figure out the step by step. Abstract. Design analysis of suspension especially for racecar suspension is very crucial to achieve maximum performance and handling. Suspension design. This article deals with design of Formula SAE Suspension by considering various loads and their simulation on each component of the system.
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You might not need combined loads at the beginning, but it could be useful for looking at trail-braking and power corner exit and differential selection You might want to use the Stackpole Engineering Pacejka model from TTC Round 3, it might not be your tire, but it will give you a good indication of the common behavior of a fsae tire.
Some function and associated specifications can be derived from the RuleBook 3. As in any design problem there are some step you should take before jumping into the details.
If you have aero you have to calculate the load from it, in any case you will have drag, wich will require torque from the rear suspenison and will fsqe a small load transfer! I really like one quote or an OptimumG motto that says “Knowledge shared; Is knowledge squared”.
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Claude Rouelle who is a famous FSAE judge and president of one of the leading companies in vehicle dynamics softwares “OptimumG” saying that if you know the forces acting on your tire contact patch then sispension will be able to choose a suspension template. If you could give me a list from start to finish desigb in terms of calculations and parameters to address, that would be great.
Introduce yourself properly; namecountry, team You can’t truly design something if you can’t perform an analysis on it. Willingness to compromise is key to coming up a with a good design, nothing will be perfect.
Suspension Design Step by Step Process
Prior art, read on suspension design in RCVD for example. Secondly; There is a “Find” button at the xesign bar up at the right just beside the “New” button, So try to search for your topic if it had been discused before so as to save time and effort.
Thanks for the information! Secondly; Start by tires The more times you go around the desiign the more you learn, the better your analysis gets and the more engineering you have in your design.
I basically don’t know where to start there is so much information. Study the pneumatic tires very well I mean I’m just sharing what I know. Another free one and quite successful is Wishbone. Suspensiom then will you have to worry with roll centers, roll stiffness, kinematics, motion ratio, dampers and such things.
After which; You should be able to transform the whole 2D drawing into 3D you have 2 planes and the suspesion one is the fxae plane.
Don’t stop studying; Once you start design; Study more not less! User Name Remember Me? With this you can use your tire model to obtain forces on the car, these forces will make you able to calculate load transfers, then re-calculate the tire forces, and iterate till you converge.
I have written down one desihn, there is no “best” one, but this is systematic, and “relatively” simple since it seems to be your first go at it: The next thing that becomes obvious is the teams that have a good car design, and the cars that dialed in one very in particular if you watch it. I’m fairly new to FSAE and suspension design.
Work well on the compromises Know why before knowing how!! Not for a particular reason except that there is quite a lot of tutorials on youtube ” Start by darwing two planes; Front view and a side dssign.
Suspension Design Step by Step Process. Now slim the ideas down to a core goal. After this iteration, how can these ideas sfae formed achieve your high level goals? One thing that can be noticed is actually how bumpy the track is. Get the basics right first, the details only after. I remember watching a video where Mr. All the fitting is already done and all the equations of the model written down -Write a simple suspeension for the Four Wheel model that is able to calculate the slip angle for a given radius and steering angle, you will have to make assumptions about the slip angle at the usspension.
Then, build, race, win. So to choose a tire you need a car, and to make a car you need to choose a tire. One of the best softwares out there is OptimumK however it is not for free. Read as much as you can, follow the groundwork that’s already been laid out from years of people before you.
Then start analyzing the results from the softwares such as the camber change due to body roll, bump, droop It should be very helpful too.
Benn, Sorry, My previous post was all about kinematics Start by 2D visualizing. Who is using what, what has been used before? Sorry for any typing mistakes. Then; Put the whole geometry on a kinematics analysis software There is a knowledge-analysis-design- evaluate cycle God be with you and Good luck with your design.
Understand the basic physics first!