[FSE] Plakáty do Itálie - beta verze

Úterý Září 11 23:27:32 CEST 2012

Jirko, co to je? :D :D ... bane, dobry, fakt ze jo .)

"We can proudly state that the energy needed for the propulsion of the 
vehicle is stored an accumulator pack of our design."

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Jakub Nohejl, tel. +420 606 314 047
CTU CarTech Electric, ACP group
Czech Technical University in Prague
www.cartech.cvut.cz/electric


Dne 11.09.2012 23:11, Jiří Holeček napsal(a):
> About The Team
>
> Formula SAE is a student design competition which originated in the 
> U.S. in 1981. Since 1998 the competition known as Formula Student has 
> begun in Europe. The goal of the competitors is to design and develop 
> a formula car. The final evaluation also takes into account the 
> costing and manufacturing technology problems including the carbon 
> dioxide footprint of the whole design. All these parameters has to be 
> considered by the student team playing a role of a fictive company 
> which develops and sells this final product. The car has to be 
> inexpensive, reliable and easily maintanable in order to succeed at 
> the competitive market. The target customer is an unprofessional 
> weekend autocross or sprint racer. The production plan is to meet a 
> demand of 1000 units per year.
> The time spent by students on this project is about 35 000 hours every 
> year.
>
>
> FSE0.1 Prototype
>
> The spatial tubular frame is made from the structural steel. Its 
> welding was performed using MAG method and the final frame was 
> reinforced using honeycomb aluminium panels.
>
>
> Frame
>
> The first generation car FSE.01 designed by CTU CarTech Electric Team 
> is based on hybrid chassis which are made both from S235 tubular 
> steel and EN AW 6082 aluminium alloy water cut panels. The main space 
> frame is welded using MAG technology and subsequently reinforced using 
> aluminium honeycomb panels glued into the frame. The rear part of the 
> chassis made from the aluminium alloy is welded using TIG technology 
> and bolted to the main space frame. This hybrid chassis, where the 
> aluminium honeycomb panel is used as a main firewall component, 
> provides a very safe cockpit for the driver. For the best driver's 
> protection a 6-point safety belt is used. The car's bonnet is 
> manufactured from the glass fibre composite.
>
>
> Suspension
>
> Both axles are using independent and adjustable suspension system in 
> order to provide an appropriate dynamic and handling car 
> characteristics. The axles are equipped by a push-rod suspension type. 
> The forces acting on the suspension are transmitted into the custom 
> made shock absorbers via rocker arms. In order to increase and control 
> the axle stiffness anti-roll bars are installed on both axles. The 
> design of the whole chassis was subjected to the FEM analysis in order 
> to ensure the required fatigue life.
>
>
> Brakes & steering
>
> FSE.01 brake system uses two independent hydraulic circuits equipped 
> with adjustable biasing. The front wheels are provided by disc brakes 
> mounted on the front uprights. Willwood GP320 front brake calipers are 
> coupled with brake discs having an effective diameter of 223.4 mm. The 
> rear disc brakes are mounted to the frame in order to reduce the rear 
> unsprung mass. AP
> Racing CP4227 rear brake calipers act on the brake disc equipped with 
> an effective diameter of 194 mm.
>
> Above the driver's legs there is a mechanical steering system which 
> includes RSK Trade cross cart steering rack with the ratio 90 mm 
> displacement of the rack/ 360deg of steering wheel rotation. 
> Steering wheel, which is made from glass fibre composite, includes 
> electronic features showing the required data to the driver.
>
>
> Battery Pack
>
> We can proudly state that the energy needed for the propulsion of the 
> vehicle is stored an accumulator pack of our design. This battery pack 
> contains Li-Pol accumulator cells with an electrical capacity 40 Ah 
> per each cell. The total number of the cells is 54 and the 
> energy stored in the whole accumulator pack is as high as 8 kWh. The 
> accumulators can be disconnected from the inverter by AIR contactors 
> at any time. Two AIR contactors were used in order to fulfill the FSE 
> rules. These two contactors can operate in case of both high voltage 
> and high current event. All accumulator cells real-time monitored by 
> the battery management system which is also used for the accumulator 
> pack cooling management. The accumulator pack can be always 
> disconnected manually at any circumstances.
>
>
> Cell Distribution Scheme
>
> The accumulator pack contains six accumulator units (stacks) 
> containing less than 5 MJ energy each. These stacks are connected in 
> series. In every stack there are 9 accumulator cells in total. Each 
> cell is equipped by a temperature sensor providing the increased 
> safety of the whole accumulator pack. The container of every stack is 
> manufactured from a self-extinguishing material in order to ensure 
> desired degree of safety.
>
>
> Mounting and safety
>
> The accumulator pack frame is a TIG welded aluminium structure. This 
> design provides the required structural rigidity and the desired 
> accumulator cells protection. This frame is mounted to the steel 
> chassis of the car.
>
> The weight of the final accumulator pack is 84 kg. The mounting of the 
> accumulator pack has to withstand forces generated by a 20 
> g deceleration such that the accumulator container does not enter the 
> driver's cockpit area and therefore this loading path is crucial for 
> the safety of the driver. The mounting has to be able to bear a 
> loading generated by a deceleration of 10 g in all other directions.
>
>
>
> Tak jsem to udělal až po battery pack. Zabralo mi to něco málo přes 
> hodinu, ten zbytek už dneska do půlnoci nestihnu, tak aspoň máme něco. 
> Možná těch informací tam je pak dál až moc. Musí to taky trochu 
> vypadat tak aby se to lidem chtělo číst, kdyby se to zkrátilo a dalo 
> větší písmo tak si myslim, že by to neuškodilo.
>
>
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