Valeo at the polygon in Milovice is testing in cooperation with VŠB – Technical University of Ostrava the first car with so-called drive-by-wire control, which is the result of their joint development. This is an important step towards fully autonomous management. While fly-by-wire control, ie control without mechanical coupling via an electronic interface, appeared in the 1960s and is now quite common in commercial aircraft, in cars it still clings to the mechanical coupling between wheels and steering wheel, as well as between the brake pedal and the brakes.
However, with the imminent advent of fully autonomous driving, it is clear that such vehicles cannot do without so-called “by wire” control.
As a leading manufacturer of sensors for the automotive industry, Valeo is already working hard on drive-by-wire (DbW) control technology for autonomous vehicles. In cooperation with VŠB-TUO, it developed its own comprehensive control system of the DbW type. However, it is not primarily intended as a new comfort function that a mass-produced passenger car should receive in the near future. Based on the requirements and assistance of Valeo, Ostrava Polytechnic has developed a new hardware software platform DbW, designed for validation tests of specific autonomous control modes as well as sensors designed for assistance systems of current vehicles. Fully electronic DbW steering allows high steering dynamics, and is more precise than the best “live” test driver. Thanks to the integration of the system, the vehicle becomes fully steerable in the longitudinal and transverse direction with the possibility of emergency braking and other specific functions, suitable for development purposes.
Part of the joint implementation was the final integration of the system, which is a powerful computer with a number of communication interfaces and modules (CAN, I / O and relay modules, development HMI, power management, etc.), in the trunk of the test car and connection to electronic car systems. Valeo currently uses it at its polygon in Milovice for the already mentioned testing of assistance and autonomous systems based on a detection camera on the windshield. Vehicles with DbW can also be equipped with other Valeo sensors, such as radar, LiDAR Valeo SCALA or ultrasonic sensors.
The interface provides the main functions necessary for vehicle control, including state-of-the-art visualization via HMI, in which mechanical coupling is still used, and allows both separate stand-alone and combined simultaneous longitudinal and transverse control. For example, the system implements:
- příčné momentové a úhlové řízení,
- change of required acceleration,
- předplnění brzdového systému, resp. nouzové brzdění,
- at the same time pre-filling the brake system and steering in the transverse direction
- at the same time lateral steering and acceleration change
- simultaneous lateral steering when accelerating from zero to maximum speed (up to 200 km / h), braking again to a complete stop and restarting.
The great advantage of the DbW system is its easy portability to modern automotive platforms currently in use, including electric vehicle platforms.
Valea technology is integrated into one of four new vehicles manufactured worldwide. Valeo has the largest technology portfolio on the market and offers ultrasonic sensors, cameras, radars and mass-produced LiDAR for the automotive industry, which promotes safer and smarter mobility.
*The article has been translated based on the content of Aktuality – 2D a 3D CAD Design Software by www.cad.cz. If there is any problem regarding the content, copyright, please leave a report below the article. We will try to process as quickly as possible to protect the rights of the author. Thank you very much!
*We just want readers to access information more quickly and easily with other multilingual content, instead of information only available in a certain language.
*We always respect the copyright of the content of the author and always include the original link of the source article.If the author disagrees, just leave the report below the article, the article will be edited or deleted at the request of the author. Thanks very much! Best regards!