Which scope screen shows a trace of CAN bus lines?
FSA 2016
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What kind post-processing is not allowed to remove acceleration spikes from the IAD data?
FSA 2016
To which angle would you have to tilt a car so that the direction of gravity is colinear with the forces experienced during a lateral acceleration of 1,41g on track?
FSA 2016
How much does the vertical load on each rear tire increase at 72kph when the wing shown in the sketch is used vs. running without wing? density = 1.2 kg/m^3 Wheelbase = 1.6m Wing: cl*A = 0.6 m² cd*A = 0.3m² yW = 0.8m zW = 0.4m zs = 0.3m Static weight distribution = 51% rear ignore wing weight car is completely stiff
FSA 2016
In the illustrated thermodynamic cycle of an ideal gas, the values for pressure p1=7 bar and volume V1=0.6 m3 at point 1, volume V2=3.3 m3 and temperature T2=800 °C at point 2 and pressure p3=0,6 bar at point 3 are given. The volume at point 1 is the same as at point 4. The volume at point 2 is the same as at point 3. The pressure in point 4 is to be calculated in bar! Round the solution to one decimal place.
FSG 2021
Calculate the voltage UAB between A and B in multiples of Voltage Uq. Enter the exact solution as a completely simplified and reduced fraction in the format numerator/denominator. Numerator and denominator must be integers, e.g. 1/2
FSG 2021
Which of the following terms describes an economic principle that is most essential for the success of companies that strive for cost leadership in their market?
FSG 2021
A logic plan with the five logic valued inputs A, B, C, D and E is shown in the picture. The gates are drawn according to the commonly used ANSI/IEEE Std 91/91a-1991. How mant possible input compinations result in a logic false at the output Z?
FSG 2021
A thin-walled (t ≪ a) cross-section is shown in the figure in gray. All relevant dimensions are given in the drawing. The drawing itself is not to scale. Calculate the second moment of area of the cross-section about the x-axis through point O using the thin-walled assumption and resulting simplification. Enter the exact solution:
FSG 2021
Your team decides to use aluminum cables instead of copper to save weight. As there is no proper sizing table for these cables you try to calculate the proper fusing value yourself. The cross-section of one cable is A. You measured the thickness of the insulation which is t. From previous experiments you know, that the cables will face a maximum ambient temperature of Tamb inside your vehicle and that the heat transfer coefficient between the wire and ambient through the insulator is λ. The coefficient is estimated in relation to the average diameter of the conductor and the conductor with insulator. Which fuse value must be chosen to have the maximum possible current without exceeding a temperature of Tmax inside the cable. The fuses are available in 1 A size steps. The fuse is considered to be ideal, i.e. it trips immeadiately if the rated current is exceeded. The resistivity of aluminum is assumed to be ρAL The linear approximation for temperature dependence with the temperature coefficient α is used. The following conditions are assumed: cross section of cable A = 2 mm2 thickness of insulation t = 0.36 mm maximum ambient temperature Tamb = 50 °C maximum wire temperature Tmax = 70 °C heat transfer coefficient between wire and insulator λ = 6 mW / (K * m) resistivity of aluminum ρAL=26.4 nΩm temperature coefficient α=0.0041 1/K Enter the calculated fuse size.
FSG 2021
How much does the customer price (incl 19 % VAT) for a sportscar need to be, in order to achieve a net present value (NPV) for the program at decision (year 1) of 100.000.000 € (one hundred million), considering that it will need an investment of 50.000.000 € (fifty million) in year one. The program will sell 500 cars per year in year 2,3,4 and 5 and ends after that. In year 6 the tools and intellectual property can be sold for 10.000.000 € (ten million). The cost of capital/interest rate is 7.5 % per year (WACC). The cars are sold with a calculated gross margin of product of 40 %. The customer price is assumed to be constant over all years.
FSG 2021
The shown finite state machine is used to check if an input data stream matches with some regular expression. The data matches the regular expression if the final state qd is reached at the end of the input stream. What regualar expression(s) will be checked by the state machine? You may select one or more answers.
FSG 2021
Mark all true statements according to the FS Rules
FSG 2021
An idealized FSE vehicle is driven by 4 identical, ideal wheel hub drives (no losses, no inertia) and has a weight distribution of 50/50. The aerodynamic balance is 50/50 as well and independent from vehicle speed. The following diagram shows the wheel torque (of one single wheel) T over the vehicle speed v for a perfect full accelaration without wheel slip. Calculate v1 and v2 as shown in the picture in km/h. Dynamic load transfer is neglected. The motor is assumed to be limited only by its maximum torque and maximum power. Given parameters: Vehicle mass m = 190 kg dynamic rolling radius of each tire rdyn = 200 mm aerodynamic lift coefficient of the vehicle cl = -1.25 aerodynamic cross sectional area of the vehicle A = 1.3 m2 tire friction coefficient μ = 1.2 gravity g = 9.81 m/s2 air density ρAir = 1.2 kg/m3 maximum wheel torque (each) Tmax = 130 Nm maximum wheel hub drive power (each) Pmax = 20 kW Round both solutions to one decimal place. Give the solution in the following format: v1, v2, e.g. 1.2, 3.4
FSG 2021
During Autocross, a Formula Student vehicle accelerates from 30 km/h to 100 km/h. Assume that there is no friction and no aerodynamic drag. The mass of the vehicle is m = 190 kg. The amount of energy needed for this accelaration is denoted by E. What would be the theoretical velocity vc if the vehicle is accelerated from standstill using the same amount of energy E? Enter the solution in km/h and round to one decimal place. What would be the theoretical velocity vF of Fred, the FSG race Alpaka as shown in the picture, accelerating from standstill and using 1/10th of the energy E? Fred's initial mass in standstill is 50 kg. When reaching 20km/h, Fred will loose 750g of mass in no time. Assume, that the lost mass does not provide any thrust and has no initial relative velocity with respect to Fred. Fred is free of friction and aerodynamic drag. Round both solutions to one decimal place. Give the solution in the following format: vc, vF, e.g. 1.2, 3.4
FSG 2021
Your front hoop bracing member consists of a round straight tube made out of baseline material with the dimension 25.4 mm outer diameter and 1.6 mm wall thickness and a total length of 968 mm. What is the percent increase of the bending stiffness (defined as EI) if you use a round straight closed section tube with the dimension 30 mm outer diameter and 1.5 mm wall thinkness. Round solution to one decimal place. How much percent increase the weight for this tube? [r=7.874 g/cm³] Round Solution to one decimal place. Give your answer in the following format: stiffness inc., weight inc. Example: if the stiffness increase is 45,6% and the weight increase is 23,4% then use 45.6, 23.4 as answer value.
FSG 2020
Which Brake System Plausibility Device (BSPD) cricuit is allowed according to the rules? Assume the threshold voltages VHi and VLo to be properly set, and both the brake pressure sensor as wall as the tractive system current (P) / throttle position sensor (TPS) to have a positive slopw. The power-on-reset (PoR) signal is assumed to switch from low/false to high/true shortly after the power supply for the circuitry is turned on. If there is a high/true input signal to the MOSFET power stage, the MOSFET is in conducting mode. There is only one correct cirucut!
FSG 2020
For a pneumatic actuated brake system a team is using a pressure bottle with an relative pressure of 50 bar with respect to the atmosphere and a total inner volume of 4 litre. Consider a portion if gas, which at 1 bar absolut atmospheric pressure world fill a volume of 0.02m³ is missing in the bottle. What would be the new relative pressure with respect to the atmosphere in the bottle? Enter the solution in bar and round solution to one decimal place.
FSG 2020
To the lever on a swing-top beer bottle as shown in the picture a force of F = 30 N will be applied. Given are the three lengths L1 = 19 mm, L2 = 21 mm and L3 = 44 mm. Please calculate the Force F1 with which the cap is pressed to the bottles opening. Consider no movement occurs. Enter the solution in Newton and round to whole numbers.
FSG 2020
A bell crank (as shown in the picure/ dimensions are not to scale) with bearing point [A] is applied with a force F=50N at an angle a=25°. Consider no movement occurse. Please calculate the absolute value of the force FF in the spring. Enter the solution in Newton and round solution to one decimal place.
FSG 2020
A sinusoid signal gets sampled by an analoge to digital converter. The frequency of the analoge sine wave is 400Hz, the sampling frequency is 340Hz. What is the frequency of the sampled signal? Enter the solution in Hertz and round to the whole numbers.
FSG 2020
What is the dissipating heat energy per hour of a sooling system of an accumulator unit in an EV vehicle when the coolant surrounding the accumulator heats up to 55°C, the cooling ater (c=4.19kJ/kgK) circulates with 17 kg/min and the cooler has an outlet temperature of 40°C (assume the lines as lossless)? Enter the solution in kJ/h and round to whole numbers.
FSG 2020
In the following there are multiple statements abount the rules. Which staements are correct?
FSG 2020
The free vertical oscillation of a vehicle without dampers and without rubber damping can be modeled by the differential equation M*ÿ(t) + K*y(t) = 0 with the matrices as given in the figure. The vehicle mass is assumed to b m1 = 800k, the axlemass m2 = 60kg, the spring stiffnesses are k1 = 170N/cm and k2 = 1800 N/cm. What is the lowest resulting eigenfrequency of the system? Enter the solution in Hertz and round solution to two decimal places.
FSG 2020
According to the rules, an insulation monitoring between TS /TS- and LV- GND is mandatory. The measurement principle has to be
FSCH 2020
As soon as all components defined in EV6.1.2 close the shutdown circuit, it is allowed to close the AIRs.
FSCH 2020
All phases of a PMSM and a induction motor are independently shorted at standsill. The torque of which motor is higher if remanence is neglected and the rotors start to spin:
FSCH 2020FSCH 2023
Calculate the cornering speed during Skidpad (you can use centerline radius stated in the rules) using following information: μᵧ = 1.4 m = 240 kg Cl = 3.2 A = 1m² p = 1.1 kg/m³ It is assumed, that there is no weight transfer and all 4 tires are at the optimal grip level. (answer in m/s)
FSCH 2020FSCH 2021
You want to drive with a Lithium Polymer cell with 3 Ah and weighting 60 g. Which of the following configurations would be allowed by the rules? a) 7 compartments in series with 4p20s configurations b) 8 compartments in series with 4p18s configurations c) 4 compartments in series with 4p30s configurations d) 5 compartments in series with 4p24s configurations
FSCH 2020
During Skidpad your car is in the following steady-state situation: Ψ = 1.3 rad/s vx = 42 km/h vy = -3 km/h The geometry is given by the following parameters: Wheelbase: L = 1.53 m Trackwidth: T = 1.2 m Steering angle: δ = 10° Calculate the slip angle at the front left wheel, assuming a 50/50 weight distribution. (Please enter the absolute value of your answer in °)
FSCH 2020