Suspension geometry part 1 camber, toe, caster, kpi, scrub radius sk8215. Redesign of an fsae race cars steering and suspension. Upper lateral link, lower parallel links, twin trailing link rear a variation of the reversed lower aarm style. Few teams also go with spring damper on lower wishbone system. Lowering the rf aarm inner pivot raises the front roll center and moves it to the right. Help best software for suspension geometry for mac. How to choose spring rates for your car speed academy. Suspension geometry part 1 camber, toe, caster, kpi. After rules analysis, which limits the suspension a minimum travel and wheelbase, project targets were defined, than a benchmarking was made on top teams. For the amateur car designer, there are many tools available today that make designing a car easier. Optimization of suspension characteristic of a pushrod actuated suspension system of an fsae car 74 form the programming, the sampling points coordinates for the surface is collected as shown in fig 3. A thorough analysis of 2004 usq racer car has been included in order to. All accelerations, either lateral or longitudinal, must be put to the ground through the tires, which are held in contact with the ground by the suspension system. Introduction he steering system of a formula sae car is of the utmost importance as it has to have a good reaction to all turns and corners at the event.
In this paper, kinematics analysis software adamscar was used to establish the fsae car racing double wishbone independent front suspension simulation model, kinematics simulation analysis has been used to get the wheel beats of each parameters variation. After getting used to the design cycle of our universitys formula sae car, i find myself wanting some quasiaccurate cad of my cobra. Optimum suspension geometry for a formula sae car pdxscholar. Design and optimization of fsae race car suspension system. These forces have been calculated for all the links of a double wishbone suspension geometry.
Hypercoils have been utilized by every indianapolis 500 winner since 1965. From the factory, the mustang suspension has to compromise for the sake of the passengers comfort. Having the suspension fundamentals nailed allows for better chassis design actual understanding of torsional rigidity and in general an overall better vehicle as your trade offs. Mostly rear pull rod can interfere with your drive shafts. Siemens helps prepare students for the workforce by partnering. Design of a carbon fiber suspension system for fsae applications. Fsae os team will redesign the outboard suspension for my12. The classis 60s sports and racing car rear suspension. Car design tools for chassis, suspension, aerodynamics. No matter the engine work, no matter the aero work, in fsae suspension handling is king.
Really, front roll center adjustments at the track are easy if performed with a little thought and reasonability. There may be significant differences in dynamic tuning parameters for different fsae packages. The load paths and fbd have been drawn and axial stress in the all the linkages. Lower lateral link, upper reversed aarm, twin trailing links rear a variation on the above. Adams is the most widely used multibody dynamics and motion analysis software in the world.
This paper is an introduction to formula sae fsae suspension and frame design based on the experience of the design team at um. Redesign of an fsae race cars steering and suspension system. Which suspension setup is the best for an fsae or student car. Technical note on design of suspension parameters for fsae vehicle o.
Analysis of wishbones, upright, fsae, tiredata, etc. As far as easy to use and understand gui and simulation time is considered i would recommend you to use optimum k and suspensionsim for your kinematic and compliances of suspension system. Which suspension setup is the best for an fsae or student. Simulation and optimization of fsae racing suspension.
To design and build 2 sets of dampers 8 in total for a fsae racecar, that will perform better than any available offtheshelf piece, and run them at the fsae competition in may 2006. For the simulation results, part of the suspension of the hard points position have been optimized by adamsinsight module, to improve the. The old model remains at the back of the drawing, you can use it as a guide when making adjustments to the layout or visually compare how the changes will perform when the suspension is in motion. Technical note on design of suspension parameters for fsae. Jan 11, 2017 rather than marrying ourselves to a specific suspension frequency at this point, well simply use it as our fudge factor once we get to the point that were calculating spring rate. The team has thirteen returning members that are responsible for designing and manufacturing each of the five vehiclesubsystems. A picture of the 2017 viking motorsports internal combustion.
The topic of this project is the kinematic analysis of an independent suspension, taking into consideration the suspension system of the formula sae electric car of the university of padua raceup team. Design and optimization of the steering system of a. June 2023 in lincoln, ne chip every year psus viking motorsports team builds a open wheel race car, with a limit of a 600 cc engine to compete against other engineering schools in the international fsae competition. The front and rear suspension systems of the vehicle were developed using. Keywordssuspension molding, double wishbone, variable. It is also required that this new rear suspension design be interchangeable with the solid rear axle design. Dec 10, 2016 first of all u have to decide which suspension system u are going to have on your formula car. The best software for students in formula sae and formula student.
Design and optimization of a formula sae racecar chassis. Introduction to formula sae suspension and frame design. Steering system and suspension design for 2005 formula saea. Hate having to get out and get under to find in this or that fits, what the next thing will mount to, etc. Suchomel culs prague, technical faculty, department of vehicles and ground transport, prague, czech republic b. A quick video of the mtsu fsae suspension setup that i designed. Optimization of double wishbone suspension system with. First of all u have to decide which suspension system u are going to have on your formula car. A basic description of each dynamic parameter is included in appendix a. The anyalysis in this paper will be heavily re liant on. The 2002 lawrence technological universities formula sae car will be used as an example throughout this paper. The purpose of this paper is to present experimental data on designing and optimizing a carbon fiber suspension.
The purpose of this paper is to present experimental data on designing and optimizing a carbon fiber suspension system for formula cars. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. When the stock suspension is engineered, it has only a few primary duties to handle the weight of the vehicle, provide great ride quality, and handle normal driving road conditions. Reducing weight while maintaining structural integrity is one of the key challenges formula sae teams face as they try and design the suspension of the formula car.
In the meantime, vehicle subsystems like steering, suspension, drive train, and electronics are packaged and optimized on the computer. Its for this reason that we offer the ttx25 mkii fsae. Unofficial discussion forum for formula sae and formula student engineering competitions, part of the sae international collegiate design series. This works is focused on the development of a multibody model of the mg07. The suspension system must therefore keep the largest contact tire patch at all times. It will be used to define the optimal setup of the car for a specific track, verifying the results with a data acquisition system on the real vehicle. Mostly fsae teams have double wishbone pushrodpullrod suspension system. Raising the rf aarm inner pivot lowers the front roll. Jan 29, 2018 suspension geometry part 1 camber, toe, caster, kpi, scrub radius sk8215. These parameters are intended to describe a racing package similar to dartmouth formula racings 2006 fsae car. To verify that, i compered my results with the results obtained using lotus suspension analysis software. Values specific to the 2006 mracing fsae vehicle have been excluded from this report to protect the competitive interests of the team.
Nov 21, 2011 a quick video of the mtsu fsae suspension setup that i designed. The front roll center is a point in space that is derived from the lf and rf instant centers and their relationship to the contact patch. Ruzicka university of technology brno, faculty of mechanical engineering, institute of machine and industrial design, brno, czech republic. The following report from reid olsen, eric melchiori and andrew bookholt of composite suspension solutions shows how that comparison was conducted and its results.
Constant value unit signification m 300 kg overall vehicle mass wf wr 45 55 % % mass distribution related to front rear axis f f m w m 5 kg overall mass on front axis r r m w m 165 kg overall mass on rear axis muf 27. Tire data has been used to find out the friction coefficient at the contact patch which varies to the normal. Problem statement suspension components on any racecar must maintain a balance between weight, stiffness, strength, cost and manufacturability. The target values for concerning and braking have been set according to the tracks present in the fsae international events. Mustang ii front suspension build your own, fraction the cost. Cite this article anshul dhakar and rishav ranjan, force calculation in. Optimize various parameters such as suspension stiffness or location of center of mass. The plans with work with stock or dropped spindles, as well as stock or aftermarket control arms. Design of formula sae suspension theory in practice. How to find or calculate suspension points in fsae chassis.
Each subsystem requires its members to implement organizational, managerial, and most importantly. As known, pull rod helps in reducing the cg, which is not a negligible one but pull rod system poses a lot of packaging difficulties. After analysis and optimization of the geometry the entire system is designed in solidworks. Siemens software skillshops for formula sae students. Formula sae interchangeable independent rear suspension. Adams car software allows students to design and simulate their fsae. Employing research and designs from previous years cars, the suspension will be designed using the iterative design process. Design of suspension system for formula student race car. The car is evaluated in automotive design and performance through a series of static and dynamic events which focus on safety, manufacturability and of.
If youre part of a new team, i suggest putting a lot of emphasis on this. Adams helps engineers to study the dynamics of moving parts, how loads and forces are distributed throughout mechanical systems and to improve and optimize the performance of their products. How to design suspension mounting points for formula sae car. To help with this process, multiple programs and methods will be used. These systems were the cars rear suspension, component. Introduction the suspension system is one of the most important systems to consider when designing a fsae car. The suspension geometry of a standard fsae race car has been used for the calculation of the forces.
This will allow testing of the two different design approaches for a more. You can also use this function to compare front and rear suspension although be careful as only the model at the front of the drawing is saved within. Design and optimization of a formula sae racecar chassis and suspension. Susprog3d is the premier kinematic suspension design and analysis tool. How to design suspension mounting points for formula sae. Hyperco suspension components are a part of winning, from street to track. General motors engineering, chassis, suspension, and program engineering. Wolfpack motorsports is nc states formula sae team. The suspension system is one of the most important systems to consider when designing a fsae car. The vehicle presented in this project is the fsaeprototype of the university of padua, which competed in the 20 season of the series.
For windows 7, 8 and 10 with opengl see the faq for more details faq for more. Index terms steering, fsae, ackermann, lotus shark, solidworks i. Which software should one use to design suspensions for. Design of a carbon fiber suspension system for fsae. Through baseline testing and component evaluations, systems of the car were identified as areas that reduced performance and prohibited predictable vehicle dynamics. Suspension geometry part 1 camber, toe, caster, kpi, scrub. Formula sae interchangeable independent rear suspension design. This paper proposes a procedure which involves kinematic and dynamic analysis followed by vibration analysis for the design of a double aarm pushrod suspension system. Our suspension geometry was a huge project with design spanning the better part of august to february or more add some summer sessions, late tweaking well into march april.
Design and optimization of formula sae suspension system. A slotted aarm plate allows you to use slugs to make front roll center adjustments at the track giving you another weapon in your adjustment arsenal. How can i learn designing suspension mounting points. Introduction to formula sae suspension and frame design edmund f. Professionally drawn, fullydimensioned engineering drawings that show every aspect of mustang ii street rod front suspension construction. The university of birmingham formula student team ubracing competes in the.
Salinas university of missouri rolla abstract this paper is an introduction to formula sae fsae suspension and frame design based on the experience of the design team at umrolla. The unequal aarms with tierod on front and rear suspension are detailed. How much thought goes into your suspension geometry. It started with optimization of the track and wheelbase based on previous autox courses at michigan. Steering system and suspension design for 2005 formula. Designing and constructing a chassis and suspension system for a formula sae racecar is a highly complex task involving the interaction of hundreds of parts that all perform an. For windows 7, 8 and 10 with opengl see the faq for more details faq for more details. Post here to have your teams flair added to the lis. Also, for professors, msc products are available at discounted prices for classroom and research use. May 07, 2017 as known, pull rod helps in reducing the cg, which is not a negligible one but pull rod system poses a lot of packaging difficulties. From creating an accurate model of the car and every nut and bolt in it in 3d, to the design and simulation of critical aspects such as the chassis and suspension, software programs have become commonplace to amateur car design.