At its ‘Nissan Futures’ event in Yokohama, Japan, Nissan Motor Co., Ltd. has unveiled a lunar rover prototype jointly developed with the Japan Aerospace Exploration Agency (JAXA).
The JAXA Space Exploration Innovation Hub Center is conducting research on lunar rovers – a key technology for space exploration. Nissan has been working with JAXA on driving controllability of the rovers since January 2020.
A lunar rover must be able to traverse the Moon’s powdery, rocky and undulating terrain and be energy efficient. Furthermore, energy sources for operating vehicles in space are limited. Nissan has brought its all-wheel EV precision control technology to bear on boosting the rover’s surface driving performance.
Nissan’s research applies the motor control technology it has developed through its production of mass-market electric vehicles, such as the Leaf car, as well as the e-4ORCE all-wheel control technology featured on its new Ariya electric crossover model. In particular, it is the e-4ORCE control technology that is boosting the lunar rover’s performance over tricky terrain.
Nissan’s e-4ORCE technology precisely controls all four wheels independently, providing the driver with confidence in various conditions. With this focus on the development of stable driving performance through its EV all-wheel control technology, Nissan was in a solid position to help design the lunar rover.
In its joint research with JAXA, Nissan is evolving e-4ORCE technology to improve its performance in sandy terrain and other harsh conditions. When cars are driven in sand their wheels frequently spin and dig in, impeding progress. A high level of driving skill is required to avoid getting stuck. To meet this need, Nissan has developed driving-force controls that minimise the amount of wheel spin in accordance with surface conditions.
Through the joint research, Nissan aims to contribute to the technological evolution of automotive technology and space exploration technology by sharing know-how gained from test-vehicle development and combining it with JAXA’s knowledge of rover research.
Ikkoh Funaki, director of the Space Exploration Innovation Hub Centre at JAXA, said: “JAXA aims to apply the research results to future space exploration. We are collaborating with companies, universities and research institutes on projects that are feasible and have potential for commercialisation and innovation. By conducting research with Nissan, which has expertise in electrified technologies, we hope to apply our findings to the development of higher-performance lunar rovers.”
Toshiyuki Nakajima, general manager of the Advanced Vehicle Engineering Department in charge of e-4ORCE control development at Nissan, said: “The uses of automobiles and driving situations are wide-ranging. We aim for the ultimate driving performance through our research and development and believe the know-how gained from this joint research with JAXA will lead to innovations in our vehicles that will bring benefits to customers.”
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