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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Use the Bicycle model first for practice, then build to a Four Wheel 2D model. 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. I remember watching a video where Mr. Understand the basic physics first!
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. Then, build, race, win. After this iteration, how can these ideas you’ve formed achieve your high level goals? Page 1 of 2 1 2 Last Jump to page: The suspension permits control of the vehicle direction.
Hello Benn, First warm greetings and afterward; I’m a beginner too so don’t take this as an expert talk Analyze handling of the car for different parameters and choose system parameters. After which; You should be able to transform the whole 2D drawing into 3D you have 2 planes and the third one is the top plane.
Introduce yourself properly; namecountry, team I mean I’m just sharing what I know. What are the suspdnsion requirements, for the suspension sub-system, these should emerge from the functional requirement of the car. Benn, Sorry, My previous post was all about kinematics It’s skipped forward to the final 5.
Suspension Design Step by Step Process
Vehicles without suspension have won, and they can be fast, as long as the proper adjustments are left open for balance. Prior art, read on suspension design in RCVD for example. Then; Put the whole geometry on a kinematics analysis software So to choose a tire you need a car, and to make a car you need to choose a tire. 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.
You won’t be able to be sure about the results unless you have tire data! One thing that can be noticed is actually how bumpy the track is.
These specifications should be written in a table for fast reference. Don’t stop studying; Once you start design; Study more not less! Now slim the ideas down to a core goal. One of the best softwares out there is OptimumK however it is not for free. Study the pneumatic tires very susoension Is there something that can be innovative to the design?
First; I want to tell you a tiny little thing The suspension must permit vertical movement between the suspended mass relative to the tires. And start sketching on the front view geometry by drawing lines to express your wishbones and your unsprung mass and then move to the side view You will have to make basic assumptions to estimate the values.
Claude Rouelle who is a dessign 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 be able to choose a suspension template. How far up the helix can you get in your Deaign tenure?
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 wheel and will create a small load transfer! Secondly; There is a “Find” button at the utility 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. Read as much as you can, follow the groundwork that’s already been laid out from years of people before you.
Remember that the tires are the only contact you have between the sprung mass and the ground. Or find the yaw moment when both external tires are at peak for different radius.
Willingness to compromise is key to coming up a with a good design, nothing will be perfect. They have Formula SAE cars and course already modeled into the software.
Only then will you have to worry with roll centers, roll stiffness, kinematics, motion ratio, dampers and such things. The time now is Not for fzae particular reason except that there is quite a lot of tutorials on youtube ” Start by darwing two planes; Front view and a side view. What are the specifications associated with your functional requirements.