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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God be with you and Good luck with your design. I hope I haven’t said something stupid, if so I duly apologize. Not for a particular reason except that fae is quite a lot of tutorials on youtube ” Start by darwing two planes; Front view and a side view. Start by 2D visualizing. You’ll have to loose something in order to win the other.
Suspension Design Step by Step Process.
You can’t wait to perfect your knowledge and analysis–you’d never design anything! How cesign up the helix can you get in your FSAE tenure? I mean I’m just sharing what I know.
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. Results 1 to 10 of The more times you go around the cycle suspehsion more you learn, the better your analysis gets and the more engineering you have in your design.
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Is there a reason why many have converged on a certain concept? Then; Put the whole geometry on a kinematics analysis software Or find the yaw moment when both external tires are at peak for different radius.
I’m fairly new to FSAE and suspension design.
Suspension Design Step by Step Process
The suspension must permit vertical movement between the suspended mass relative to the tires. Hi Benn, Another thing I’d look into is setting some goals for your suspension by identifying what parameters will really affect your laptime.
They have Formula SAE cars and course already modeled into the software. You won’t be able to be sure about the results unless you have tire data! What are the specifications associated with your functional requirements. You will have to make basic assumptions to estimate the values. Who is using what, what has been used before? Another free one and quite fase is Wishbone.
The time now is Some function and associated specifications can be derived from deisgn RuleBook 3.
As in any design problem there are some step you deisgn take before jumping into the details. Hello Benn, First warm greetings and afterward; I’m a beginner too so don’t take this as an expert talk Work well on the compromises OptimumLap would be a good place to start as it will give you a decent idea of what really affects laptime on one of these cars.
Study the pneumatic suspenxion very well I remember watching a video where Mr. 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 you will suspensioh able to choose a suspension template.
So to choose a tire you need a car, and to make a car you need to choose a tire.
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Do you want to just keep the wheels on the car and complete the laps or do you want a car that is the fastest thing in a corner? With this tool you will be able to make graphics, table or whatever you like by example, by iteration you can find the maximum lateral G that gives a zero yaw moment for different radius. 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: Know why before knowing how!!
These specifications should be written in a table for fast reference.
Prior art, read on suspension design in RCVD for example. One thing that can be noticed is actually how bumpy fsaw track is. User Name Remember Me? Read as much as you can, follow the groundwork that’s already been laid out from years of people before you. Then go back to your model and edit it again and analyze once more and start iteration.
Thirldy; If you want to start your design process, Then start by visualizing a 3D model of any type of suspension you want One designn the best softwares out there is OptimumK however it is not for free.
Then start analyzing the results from the softwares such as the camber change due to body roll, bump, droop Use the Bicycle model first for practice, then build to a Four Wheel 2D model.
Remember that the tires are the only contact you have between the sprung mass and the ground. Sorry for any typing mistakes. I basically don’t know where to start there is so much information. About your topic it had been discussed quite alot, But I’m going to share what I got anyway. Why were certain concepts used and others abandoned? I’d start by analyzing and understanding a few existing suspensions.