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Hera

The third EV-DV-merged car, HERA, is a beast on the track, fit to fight for pole positions. While many previous cars have had under-mounted accumulator, this year's car features a rear-mounted accumulator. With this change, the monocoque and several other systems needed new designs.

Overall, this allowed for new, innovative solutions. In the pursuit of winning individual disciplines, and of course the overall trophy, the mechanical, electrical, and software groups had to work closely to ensure well-communicating and reliable systems.

For the first time in years, last year's car was taken out for drives in the Spring semester, with a focus on testing new changes in the autonomous systems codebase. The Spring test season was successful and proved that the codebase is ready to make HERA one to watch out for at the competitions.

Details

Performance Figures

Weight

165

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.1

s

Wheel Torque

1554

Nm

Mechanical

  • New monocoque to fit rear-mounted accumulator
  • Aerodynamics vastly optimized for cornering
  • Reduced gearbox weight by 10% and increased stiffness by 78%

Electrical

  • 3rd generation in-house-developed inverter
  • Rear-mounted accumulator
  • Improved phase changing material for cooling, increasing the thermal capacity by 40% without increasing total weight

Software

  • Use of new simulator for gaining insight into the effects of design changes on the car
  • Improved pipeline for autonomous driving improving performance and reliability
  • New telemetry platform

achievements

FS Netherlands

  • 1st place Overall

  • 1st place Engineering Design
  • 1st place Autocross
  • 3rd place Endurance
  • 1st place Efficiency

FS Austria

FS East (Hungary)

  • 2nd place EV Acceleration
  • 2nd place DV acceleration
  • 2nd place DV Skidpad
  • 3rd place DV Engineering Design

FS Germany

  • 2nd place DV Engineering Design
  • 3rd place DV Acceleration

Lyra

LYRA is an awakening speed monster eager to attack the race track. She has a strong body fit to tackle any turn, a steady circulatory system effectively transmitting signals and distributing energy, and a refined nervous system turning impulses from the surroundings into agile movement. With these features, she will blaze through the race track as fast as a shooting star. In other words, the mechanical and electrical systems, tied together by software, forms our eleventh racecar in a line of top-performing predecessors.

Details

Performance Figures

Weight

164

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.2

s

Wheel Torque

1554

Nm

Mechanical

  • Center of mass: 267 mm above ground
  • In-house designed steering rack
  • Use of multibody simulations
  • Downforce equal in both straights and turns
  • Pitot probe for measuring wind velocity
  • Strain gauge system

Electrical

  • New in-house developed inverter: I21
  • Strain gauge system: 4 controllers communicating with 20 workers
  • Battery pack: 6.3 kWh accumulator
  • Microcontrollers in the power control unit (PCU) PCB
  • Cooling: Phase changing material

Software

  • New in-house developed data storage solution: SKN
  • Improved lap time simulator

achievements

FS Netherlands

FS Austria

6th Place Overall

2nd Place EV Skidpad

FS East (Hungary)

1st Place MV Autocross

1st Place DV Acceleration

2nd Place MV Skidpad

3rd Place MV Acceleration

FS Germany

4th Place Overall

1st Place Efficiency

2nd Place Endurance

3rd Place MV Skidpad

Aurora

Introducing our 10th car, AURORA. Aurora's name is an homage to our first car, KA Borealis R, which is named after the northern lights – Aurora Borealis in Latin. We have chosen to name our 10th car after our first because we would not be where we are today without our humble start. Aurora is also a game-changer when it comes to autonomous driving. This is our first car design to both compete in driver and driverless competitions. This ambitious step comes with a lot of challenges. The goal is to create an autonomous vehicle that does not compromise on the manual driving capabilities. A new monocoque has also been introduced this year, for the first time since 2018. The new monocoque will embrace the challenge of having a fast driverless car. It makes room for new sensors and actuators without compromising on aerodynamics and structure.

Details

Performance Figures

Weight

166

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.5

s

Wheel Torque

1554

Nm

Mechanical

Electrical

Software

achievements

FS Netherlands

FS Austria

FS East (Hungary)

  • 2nd place EV Skidpad

FS Germany

  • 1st place EV Skidpad

Luna

LUNA is our seventh electrical race car, and the fifth that is four wheels driven with an electrical motor in each wheel. The car has a top speed of 117 km/h, and it weighs only 157.5 kg, marking the first time we broke under 160kg. For this year, we have transitioned to smaller tyres. This resulted in having to package the motors inside the wheels. We call this concept in-wheel. The in-wheel concept required a new design of the upright, how the motors where mounted, and the dynamics of the vehicle. From the side of the vehicle one can barely see the motor sticking out.This was also the first year we design our own rims in carbon fiber. This results in a lighter rim that is stronger than the previous years rims. Moreover, the custom design of the rims results in a better adaption of the mounting points for the hub.On the electrical side we have a new battery management system. We used a dual core microcontroller with an FPGA for the PCB. This results in more flexibility for developing a state of charge and state of health algorithm, which is planned as future development.

Details

Performance Figures

Weight

157.5

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.2

s

Wheel Torque

1560

Nm

Mechanical

Electrical

Software

achievements

FS Netherlands

FS Austria

FS East (Hungary)

  • 3rd place Engineering Design

FS Germany

  • 1st place EV Skidpad

Nova

Nova is our sixth electrical race car, and the fourth that is four wheels driven with an electrical motor in each wheel. The car has a top speed of 115 km/h, and it weighs only 162.5 kg which is a reduction of 20 kg from last year. This year, we will for the first time ever drive with self developed electrical motors! This has led to more flexibility in how we make the parts in the wheel interact, and of course learning a lot along the way. This has enabled us to make an even more compact gearbox, and we were able to reduce the weight by 15% which is 3 kg. We have also increased power with 22% and increased the top speed from 110 km/h to 115 km/h.

Revolve NTNU has a long history of developing our own inverters. The alternative is to buy commercially available inverters, but these are bigger, heavier, and harder to troubleshoot. At full speed, the inverters and the motors are able to produce a force equivalent of lifting 500 kg straight up in the air, and the driver experiences to be pushed back in the seat with double his own weight. To make this happen, the inverter has to convert the direct current from the battery to alternating current. We use 24 SiCMOS transistors to make this work, and they each open and close 12 000 times per second. If only one of them miss with less than 700 billion parts of a second, then the consequences are catastrophical. This tells about the precision required to control the inverters without even mentioning the heavy theory behind. The inverter project has lasted for over four years, eight students have dedicated a year of their life in which three of them have written a master thesis on the matter. This is without even mentioning all the competence and funds we have gotten from external partners. We are proud to say that this year we have a working self-built inverter.

Details

Performance Figures

Weight

162.5

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.2

s

Wheel Torque

1676

Nm

Mechanical

Electrical

Software

achievements

FS Netherlands

FS Austria

  • 2nd place EV overall
  • 1st place Engineering Design
  • 2nd place Autocross
  • 2nd place Endurance

FS East (Hungary)

FS Germany

  • 1st place Engineering Design
  • 2nd place EV Skidpad
  • 2nd place EV Autocross

Atmos Driverless

ATMOS Driverless, our second generation autonomous vehicle reached its potential during the season reaching both the goal of doing 5 m/s on Autocross and 10 m/s on Trackdrive. With the help of two LiDAR’s and a camera, the car is able to navigate itself. In total, we process more than 39 million pixles from the camera every second. That is about the same as 20 TV-screens. The two LiDAR’s on our car compliment each other, and accumulates over 1.6 million points each second. To find the right path, the car makes calculations about around 50 000 possible paths each second, and chooses the right one based on probability. This pipeline going from raw data to action runs at 15 Hz and that with a processing unit which is 70% smaller than last year. The driverless project in Revolve NTNU needs primarily three things. Firstly, it needs a car that is reliable and works both mechanically and electrically. This includes the competence to be able to fix the car if something happens to it. Second, you need code to make the car, based on the surroundings, make choices about where to drive. So far we have more than 65 000 lines of code, which approximates to the number of words there are in the whole trilogy of Lord of the Rings. Lastly, and maybe most importantly, you need dedicated people who are willing to put down the efforts necessary. Greeting from the ATMOS DV Team!

Details

Performance Figures

Weight

192

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.5

s

Wheel Torque

1300

Nm

Mechanical

Electrical

Software

achievements

FS Netherlands

FS Austria

  • 1st place Engineering Design

FS East (Hungary)

FS Germany

  • 1st place Engineering Design

Atmos

Atmos is the third generation four-wheel driven electrical race car developed and produced by Revolve NTNU. A new monocoque design with a rearwards inclination in the floor has opened for an aerodynamic undertray and diffuser, achieving a 30% increase in downforce. To compensate for an increase in downforce, the suspension is fitted with a 3rd spring to stabilize the chassis in heave and pitch movement. In addition to the 325 sensors used in last year's vehicle, Atmos is equipped with hub-mounted accelerometers, IR temperature sensors, and a new inertial navigation system. One of the focus areas of the year has been to provide more information about the vehicle, and information of higher quality. It is, among other things, used in the advanced torque vectoring algorithm, and to validate the performance of Atmos. The telemetry is also upgraded to include driver communication and live transmission of HD-video. This is used as a visual aid for driver-training.

Details

Performance Figures

Weight

182.5

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.2

s

Wheel Torque

1300

Nm

Mechanical

  • 3D printed upright
  • New aerodynamic undertray and diffuser design
  • Anti-roll bar
  • Heave damper

Electrical

  • Inertial Naviagation System (INS)
  • Hub-mounted accelerometers

Software

  • Driver communication

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany

Eld Driverless

Revolve NTNU decided early to join the new challenge of driverless and followed closely as the first FSD competition was held in 2017. The 20 members on the driverless team have been working hard to place Trondheim on the map of autonomous racing, resulting in a solid system based on the combination of Machine Learning and classical AI. It was Eld, our 2017 car that was chosen as our very first driverless vehicle. It now has actuators for control, an Emergency Brake System, an Nvidia Drive PX2 Auto Chauffeur for processing and several new sensors for the autonomous system. A Velodyne VLP-16 in the front gives us a point cloud, while two FLIR color cameras in the main hoop make it possible to classify the cones with color and size. We have developed two separate autonomous systems, both an end-to-end machine learning system and a full driving pipeline. For detection we use cone-detection combining LiDAR and camera with the MNIST classifier and use YOLOv3 as a redundant system. Furthermore, Eld uses a graphSLAM-variant for location and mapping, and trackfinder using triangulation and circles. Model Predictive Contouring Control with a FORCES solver is used for high-speed driving. To facilitate early testing we used a 1/7 scale Traxxas race car and Gazebo for simulation.

Details

Performance Figures

Weight

183

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.9

s

Wheel Torque

1300

Nm

Mechanical

Electrical

Software

  • NVIDIA PX2 processor
  • Velodyne VLP-16 LiDAR
  • 2x FLIR-cameras
  • Simultaneous Localization And Mapping (SLAM)
  • Trackfinder to find where the track is
  • Model Predictive Contouring Control (MPCC) for finding optimal path

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany

Eld

Eld is our second four-wheel drive electric race car. The car is based on many of the same features as our previous race car, Gnist, but designed to be even better than its predecessor. By focusing on reducing weight, we managed to shave off 7 kg. We used the same mould for our monocoque, but the aero package was revamped, resulting in a downforce of 670N at 60 km/h. Both the monocoque and the aero package are made of carbon fiber and produced in-house. We also changed the upright design to get an even stiffer and lighter upright for maximum performance. Eld consists of 66 in-house designed and produced circuit boards and 325 sensors. Our program Revolve Analyze is used to receive and use data from the sensors. Revolve Analyze is an in-house data solution for visualizing and interpreting sensor data through telemetry from the car. Furthermore, we made significant changes to our torque vectoring system to help the car stick to the track during dynamic events.

Details

Performance Figures

Weight

175

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.2

s

Wheel Torque

1300

Nm

Mechanical

  • Topology optimized wheel hub in 3D printed titanium

Electrical

  • 66 in-house designed circuit boards
  • 325 sensors

Software

  • Radionor-telemetry
  • Analyze in C#

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany

Gnist

Gnist is the first four-wheel drive electric car designed and manufactured in Scandinavia. Four hub-mounted AMK DD5-14-10 motors with individual compound planetary gearboxes provide a combined power output of 190 bhp. A total redesign from Vilje was necessary to accommodate this powertrain system. A new monocoque design, aerodynamics package, electrical systems, and more make way for an advanced torque vectoring system: By controlling the power output for each wheel individually, Gnist’s cornering and acceleration capabilities are further improved. Gnist’s drivetrain and powertrain design was acknowledged with two special awards:

  • Jaguar Land Rover Award For Innovation in Propulsion Systems
  • Class 1 Best High Voltage Powertrain Implementation by Mercedes AMG High Performance Powertrains

Other improvements include two-piece full carbon fiber rims, topology optimized titanium 3D-printed uprights, and a pushrod actuated, double un-even a-arm, suspension system.

Details

Performance Figures

Weight

183.5

kg

Power

190

HP

/

140

kW

Acceleration
from 0-100 km/h

2.2

s

Wheel Torque

1300

Nm

Mechanical

  • 3D printed titanium wheel hubs
  • In-wheel planetary gearbox

Electrical

  • Rear-mounted accumulator
  • In-house designed printed circuit boards

Software

  • 4WD Torque Vectoring
  • Telemetry over WiFi

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany

Vilje

Vilje is the second electric car by Revolve NTNU, and is a complete redesign from the KOG Arctos R. Even after the extensive weight reduction on last year's car, the weight of Vilje was reduced by another 10 kg, totalling to just 175 kg. The drivetrain is based on the Emrax 228 electric motor with an in-house developed inverter and accumulator. All electronics were developed in-house, including the battery management system, motor control and inertia measurement unit. The aerodynamics package went through a complete redesign and features an undertray and rear diffusers in addition to the front and rear wings. A two-piece monocoque design was made for the chassis and a hydrophobic nano technology paint job weighing just 260 grams was applied. For 2015 our telemetry software Revolve Analyze was completely reworked from the ground up to enable more efficient and systematic testing and driver feedback.

Details

Performance Figures

Weight

175

kg

Power

168

HP

/

123

kW

Acceleration
from 0-100 km/h

2.8

s

Wheel Torque

906

Nm

Mechanical

  • 2-piece monocoque produced in Kongsberg
  • Aerodynamic undertray

Electrical

  • In-house designed inverter
  • In-house designed Battery Management System (BMS)

Software

  • Revolve Analyze in Python

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany

KOG Arctos R

KOG Arctos R is the the third car developed by Revolve NTNU, and also Norway’s first electric race car. The car features an fully electric drivetrain and a carbon fiber monocoque, resulting in a weight loss of 65 kg compared to its predecessor KA Aquilo R. KOG Arctos R was designed from the bottom up, with an overall focus on reducing weight and at the same time introducing more power through the electric motor. The car has an extensive aerodynamics package creating a massive 140 kg of downforce at 80 km/h. The battery package for the car was designed in-house, delivering 7,6 kWh of energy and weighing in at 46 kg. Other innovations include a self-designed motor control unit, carbon fiber rims and driveshaft and titanium laser sintered uprights.

Details

Performance Figures

Weight

185

kg

Power

168

HP

/

123

kW

Acceleration
from 0-100 km/h

2.9

s

Wheel Torque

828

Nm

Mechanical

  • Carbon fiber monocoque
  • Carbon fiber aerodynamic package
  • Split-rim carbon fiber wheels
  • Titanium wheel hub

Electrical

  • In-house manufactured battery
  • In-house manufactured Motor Control Unit (MCU)

Software

  • Revolve Analyze in C++

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany

KA Aquilo R

KA Aquilo R was the second car developed by Revolve NTNU. The car had the same basic concept as the 2012 car, but introduced a wide variety of new systems, solutions and improvements. The innovations on the car include a full aero package, adaptive suspension, continuous variable air intake and a CAN-bus electronic system. The car was awarded National Instruments Measurement and Control Award for the electronic system and control systems at FSUK.

Details

Performance Figures

Weight

249

kg

Power

85

HP

/

62

kW

Acceleration
from 0-100 km/h

3.6

s

Wheel Torque

825

Nm

Mechanical

  • Adaptive suspension
  • First aero package

Electrical

  • CAN-bus system

Software

  • Wireless telemetry via Zigbee
  • First use of Revolve Analyze (Java)

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany

KA Borealis R

KA Borealis R was the first car developed by Revolve NTNU. The car features a tubular space frame, carbon fiber body and a Suzuki GSX-R 600 engine. The car was awarded Best Newcomer Award at Formula Student UK in 2012 and finished in a strong 17th out of over hundred international teams. Further on the car set a standard for Revolve NTNU in terms of design and quality of finish which has been kept by the team ever since.

Details

Performance Figures

Weight

260

kg

Power

82

HP

/

60

kW

Acceleration
from 0-100 km/h

4

s

Wheel Torque

825

Nm

Mechanical

  • Suzuki GSX-R 600 motorcycle engine
  • Steel frame
  • Carbon fiber outer skin

Electrical

Software

achievements

FS Netherlands

FS Austria

FS East (Hungary)

FS Germany