Komatsu Ltd. updated two advanced technology initiatives in April, one aimed at the moon and the other confined to Japan.
Komatsu is running simulations of its lunar construction excavator, and a video posted by the company explains how it might work. (See the video at ConstructionEquipment.com/33003916.) Komatsu was selected in 2021 to participate in the Project for Promoting the Development of Innovative Technologies for Out Space Autonomous Construction, led by Japan’s Ministry of Land, Infrastructure, Transport and Tourism.
The video lays out the challenges of lunar construction compared with terrestrial, starting with differences in gravity, temperature, and solar irradiation. Autonomous construction would be controlled from earth, so distances will affect communication.
According to the video, Komatsu has created a virtual lunar environment and is running simulations using digital twin technologies.
The excavator used in the simulation would be built of lightweight materials resistant to temperature changes and deliverable for a low payload cost.
The excavator’s power system would incorporate currently Komatsu technology, using a fuel cell powered by hydrogen and oxygen. Drive and swing motors would be regenerative, generating additional electrical power as the machine works.
The company has designed a different kind of undercarriage for traversing lunar terrain. The simulation affixes two smaller tracks at the front and back of the traditional track running the length of the machine.
Stereo cameras and sensors would provide an accurate read on terrain so the machine can dig accurately. They also identify the soil property.
Remote to customers
Komatsu and its subsidiary Earthbrain Ltd. have jointly developed a remote control system for construction equipment. The system is now available to customers in Japan. The system will be introduced to the market in phases after on-site verification for commercial production is completed in the first half of FY2023, according to the company.
To ensure steady commercial production from the previously verification concept, Komatsu developed the system based on its radio-controlled vehicles, which have a proven track record, such as in the restoration work of Mount Unzen Fugendake in the 1990s.
The system combines newly developed software and controller that convert remote control signals for radio-controlled operation and transmit them, according to the company.
The remote control cockpit developed by Earthbrain (above) enables remote control with a sense of presence, just as in the actual driver's seat, while checking the front, back, left, right, and work equipment through high-definition video sent from the construction equipment. The transmission and reception of the on-site images and control signals necessary for remote control are sent via 5G mobile network, which features high speed, large capacity, and low latency.
The system can also be linked with Smart Construction Fleet and Smart Construction Retrofit.
