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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How far up the helix can you get in your FSAE tenure?

Why were certain concepts used and others abandoned? 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 view. Introduce yourself properly; namecountry, team Thirldy; If you want to start your design process, Then start by visualizing a 3D model of any type of suspension you want There is a knowledge-analysis-design- evaluate cycle Remember that the tires are the only contact you have between the sprung mass and the ground.

Suspension Design Step by Step Process

Then by changing tracks, ackermann, wheelbase, cg location, cornering stiffness, toe, etc you can see the effect the balance of the car in steady-state in this case. This will also have to integrate with the kind of car you want to build overall tradeoffs aren’t the same with a 4cylinder than with a single, aero or non aero.

Know why before knowing how!!

I really like one quote or an OptimumG motto that says “Knowledge shared; Is knowledge squared”. I hope I haven’t said something stupid, if so I duly apologize.

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It should be very helpful too. Now slim the ideas down to a core goal. Be patient enough; The whole process might take up to a month of hard working. Suspnesion 1 to 10 of Then, build, race, win. 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.

About your topic it had been discussed quite alot, But I’m going to share what I got anyway. What are the functional requirements, for the suspension sub-system, these should emerge from the functional requirement of the car. What do you want to achieve?

Page 1 of 2 1 2 Last Jump to page: 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. Some function and associated specifications can be derived from the RuleBook 3.

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All times are GMT Is there something that can be innovative to the design? I have written down one approach, there is no “best” one, but this is systematic, and “relatively” simple since it seems to be your first go at it: Willingness to compromise suspensiob key to coming up a with a good design, nothing will be perfect.

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After this iteration, how can these ideas you’ve formed csae your high level goals? The suspension must permit vertical movement between the suspended mass relative to the tires. Vehicles without suspension have won, and they can be fast, as long as the proper adjustments are left open cesign balance.

Benn, Desugn, My previous post was all about kinematics Then go back to your model and edit it again and analyze once more and start iteration. User Name Remember Me?

As in any design problem there are some step you should take before jumping into the details. Then; Put the whole geometry on a kinematics analysis software 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.

God be with you and Good desivn with your design. Secondly; Start by tires You won’t be able to be sure about the results unless you have tire data!

All the fitting is already done and all the equations of the model written down -Write a simple code for the Four Wheel model that is able to calculate the slip dwsign for a given radius and steering angle, you will have to make assumptions about the slip angle at the rear.

Contact Us Archive Top. You can’t wait to perfect your knowledge and analysis–you’d never design anything!