REQUIREMENT FOR THE DEGREE OF. BACHELOR OF SCIENCE. IN. MECHANICAL ENGINEERING. FSAE Chassis and Suspension. 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. 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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Benn, Sorry, My previous post was all about kinematics A test has been made even with a different stiffness distribution: Now slim the ideas down to a core goal.
If you want to reduce fabrication cost for the year, you may want to stick to the tires and wheels you already have. Sorry for any typing mistakes.
Analysis of a FSAE suspension system |
Here we can see the relative speed and angular speed that stabilizes after some laps, and the results are considered only for the stabilized part of the steady state corner. Don’t stop studying; Once you start design; Study more not less! Results 1 to 10 of Then; Put the whole geometry on a kinematics analysis software All the results of the simulations are valid only for steady state analysis, low stiifness spring and low damping could be bad in transient situations, not only for the driver feeling.
Remember that the tires are the only contact you have tsae the sprung mass and the ground. 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.
An actuator moves the rack causing the front wheels to shspension the desired angle. The suspension permits control of the vehicle direction.
Page 1 of 2 1 2 Last Jump to page: 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?
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Willingness to compromise is key to coming up a with a good design, nothing will be perfect. C2 Hard spring and high damping coefficient: Some function and associated specifications can be derived from the RuleBook 3. 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. 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 The car right after the Silverstone Event in A1 Soft spring and low damping coefficient: If you could give me a list from start to finish 1,2,3,etc in terms of calculations and parameters to address, that would be great.
Then start analyzing the results from the softwares such as the camber change due to body roll, bump, droop 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. It should be very helpful too.
Contact Us Archive Top. 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: Fase for the information! It would be interesting to investigate further to see how much is the influence of a different stiffness distribution configuration.
Hello Benn, First warm greetings and afterward; I’m a beginner too so don’t take this as an expert talk In the skid syspension the difference between the two configurations is very subtle because of the fact that in steady state is the stiffness distribution, which is the same, suzpension gives you some difference.
Analyze handling of the car for different parameters and choose system parameters. Moreover generally for a driver low chassis movements are better for the feeling. It’s skipped forward to the final 5. Or find the yaw moment when both external tires are at peak for different radius.
Secondly; Start by tires On the rear the toe rods are connected with the chassis, at the front they are connected with a steering rack which is connected to the frame with a translational joint. The second part of the simulation is about the skid pad, so the car now is no more constrained over four independent patches but trimmed to let it gain the neutral position on a single road and then a torque is applied symmetrically at the two rear wheels following a spline in order to avoid slip on the first phases; the speed is then stabilized via the very high rolling resistance given to the tire and the steering rack joint driver positions the rack in order to reach the radius of the typical curve around 18 m.
What do you want to achieve? One of the overwhelming problems that I’m having is figure out the step by step process in designing the suspension system. Vehicles without suspension have won, and they can be fast, as long as the proper adjustments are left open for balance.
They have Formula SAE cars and course already modeled into the software.