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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Read and understand about the bicycle model, the understand the behaviour of the model and the tire.
The car right after the Silverstone Event in Milliken Research Associates, Inc. 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.
One of the overwhelming problems that I’m having is figure out the step by step process in designing the suspension system. Here we can see that the relative speeds in red the longitudinal component of the chassis stabilizes in the second part of the simulation. The tire forces are modeled with a simple tire model with the following parameters: The bracket joint during the dynamic response simulation is removed to have the correct behavior of the suspended and non suspended mass system.
Analysis of a FSAE suspension system |
It should be very helpful suspesnion. Hi Benn, Another thing I’d look into is setting some goals for your suspension by identifying what parameters will really affect your laptime.
Results 1 to 10 of 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. The suspension permits control of the vehicle direction. 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.
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! Page 1 of 2 1 2 Last Jump to page: Detail of the CAD front right wheel assembly view from the inside of the car.
After fwae You should be able to transform the whole 2D drawing into 3D you fsea 2 planes and the third one is the top plane. First; I want to tell you a tiny little thing 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: 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 I remember watching a video where Mr.
Suspension Design Step by Step Process
The step input has been used to find out the two best configurations amongst the possibilities and to present only the most relevant and useful results for the other inputs. A kerb or suspensoin cone hit at speed is a good approximation of a step input Ramp: Introduce yourself properly; namecountry, team As in any design problem there are some step you should take before jumping into the details.
The frequencies for the chassis movement have been calculated with the linearization element and are from 3. The model is composed by the 4 wheels rim and tire fixed on the hubs which is connected with the uprights by a rotational joint, the uprights are then connected by two couples of distance constraints representing the a-arms and a single distance constraint representing the toe rod to the suspensin.
A1 Soft spring and low damping coefficient: The chassis is fixed to the ground for the stiffness test by a bracket joint, which is removed for the other tests. Then start analyzing the results from the softwares such as the camber change due to body roll, bump, droop Below are represented the inputs used to evaluate the dynamic response with different configuration of spring and dampers. Only then will you have to worry with roll centers, roll stiffness, kinematics, motion ratio, dampers and such things.
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.
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.
Use the Bicycle model first for practice, then build to a Four Wheel 2D model.
Analysis of a FSAE suspension system
This will also have to fssae with the kind of car fswe want to build overall tradeoffs aren’t the same with a 4cylinder than with a single, aero or non aero. Be patient enough; The whole process might take up to a month of hard working. This event is held to evaluate the steady state cornering capabilities of the cars, thus it has been modeled to find out a basic setup and to evaluate under and oversteering capabilities of the model.
All times are GMT Why were certain concepts used and others abandoned? 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?