Peter1999 profile picture Peter1999 a year ago 7

RC Viper ACR - Final conclusion

RC Viper ACR - Final conclusion - Blog

This project finally came to an end. The last part of the RC Viper ACR Technology and systems, enjoy it.

RC Viper ACR - Final conclusion - Blog

I think the goals of my work have been able to be fully fulfilled, in a number of ways also to exceeded. I have managed to create the world’s first adaptive aerodynamics model using the smallest and cheapest computer in the world. With the chosen body I also created the first Dodge Viper with adaptive aerodynamics, ERS and four-wheel drive.

If I were to re-launch such a project, I would consider a different body where I could create a vacuum under the car, pull more air through the interior, and thus streamline aerodynamics. New Ford GT is an ideal example of a modern aerodynamic solution. It has both - an air brake and an adaptive aerodynamics, but most of the pressure is generated by the air flow under the chassis and through the air intakes under and around the body.

RC Viper ACR - Final conclusion - Blog

By choosing a web application, I have secured compatibility with multiple devices, demonstrating that there is no need to create applications separately for individual operating systems.

The whole system controls RPI Zero, the smallest and cheapest computer in the world, without the slightest hesitation. I managed to optimize the system so much that it only charges CPU to 4%. In addition, everything in the 1.0 version has been programmed and created on the Acer Aspire One netbook, which means I have proven that it is possible to build a model with expensive car features on much less demanding hardware.

In conjunction with RPI, Pubnub has unlimited possibilities for use. It provides us simple way to communicate with a client without having to learn the websocket, which can save time for many programmers. Of course, I have also learned to work with the websocket, as I originally programmed a version that works exclusively within the LAN network. Remote communication via Weaved can also help many programmers, who do not want to deal with Port Forwarding and address translation.

RC Viper ACR - Final conclusion - Blog

Active aerodynamics is a solution to the lack of grip at different speeds, thanks to which I achieved a higher speed of the car. However, in order to build such aerodynamics, it required many hours of study. By observing known companies, I have taken a different view of solving certain problems. For example, I can mention McLaren and their Laguna Seca circuit tests, specifically the Corkscrew. This curve is a unique with braking point in the horizon, dead apex, and then a steep fall accompanied by high overload. I have spent several weeks studying this problem because I knew that if I overcome this twist, there is nothing which could posibbly stops me. Finally, I found a solution in the front airflow control mechanism. When braking, it generates pressure on the front wheels, thanks to which the car keeps on track. This solution is one of the parts of the project on which I am proud of.

I am also proud of the variable servo timing. For most PWM-based RPI projects, servos get used to jamming, unnecessarily burdening, deflecting, thereby damaging the electronics inside them. Thanks to variable servo timing, the PWM signal is triggered only for the exact time to turn the servo to the desired position. It also reduces consumption of servos, as they are only running a few milliseconds.

RC Viper ACR - Final conclusion - Blog

In addition to aerodynamic solutions, I were particularly interested in ERS. The recuperation systems used in this model are progressive in many ways, compared to today’s systems introduced in the lower and middle class of cars. For example the Peltier module is an efficient heat recuperation element. Regarding the system to generate energy from the vibration of wheel suspension, I think that if Audi increase a MGU speed in these units, they can first come to the point where electric cars will not have to be recharged from the grid. They are already the forerunner of battery life and charging, and in a few years they will undoubtedly be very competitive for carmakers like Tesla, whether McLaren.

RC Viper ACR - Final conclusion - Blog

Work on this project has allowed me to deal with the design of racing cars, whether from electrotechnical, programmable or aerodynamic way. It has enriched me about the valuable experience I plan to use in the future.

Slovakia is currently taken as a country for car production. This project is proof that we are not just a secondary country for cheap production but we can bring new solutions to the car industry.

But lately, I realized that I achieved something more. When I started this project almost two years ago, I went from scratch. In addition to learning the necessary information, first thing to do was to make money on chassis and electronics. I have tried the production sphere, gained valuable experience, took a way to life. Since then, I have moved a lot, and when I look back on it, this project has changed my life. If I did not have an almost impossible dream, I would not be where I am today. That’s why I can tell from my own experience, if you have a dream, go for it! If you work hard, there is nothing what can stop you. There will be days, when you will want to give it up, you will ask yourself what is the purpose, but at the end, you will be happy of what you achieve. Your dream, your way, your success!