In the future, China's sky, air, land and sea scale Internet will be expected to achieve stable and secure full coverage through satellite signal transmission without relying on mobile Internet. Helping this space-based Internet of Things to form is the final stage of the rocket that should have become space junk. The “Core Cloud†smart chip load that undertakes this task was first put into trial by Fudan University after its independent research and development. As of yesterday morning, it has been running 430 hours in space and passed the first test.
“Core Cloud†was independently developed by a team led by Zheng Lirong, Dean of the School of Information Science and Engineering at Fudan University. At 2:35 am on November 15, the Long March 4 C carrier rocket was successfully launched at the Taiyuan Satellite Launch Center with China's Fengyun No. 3 (FY-3D). The "core cloud" load carried on the final stage of the Long March 4C carrier rocket will not only record the trajectory of the final stage of the rocket, but also provide the first batch of experimental data for the space-based IoT network. In the future, These payloads will serve the space-based satellite network in space-based ad hoc satellite networks.
According to Zheng Lirong, after each launch of the rocket, as the first stage rocket, the second stage rocket and the fairing fall off and return to the ground, the final stage rocket will enter the orbit along with its payload and occupy valuable in space for a long time. Orbital resources, which pose a safety threat to in-orbit spacecraft, are currently the largest volume of space debris. Even in the experimental rocket recovery technology, it is difficult to recover the final stage of the rocket.
In order to solve this problem, Zheng Lirong's research team has been engaged in high-integration and chip-forming of conventional micro-nano satellite function modules after more than two years of research, and the hardware resources can be reconfigurable and intelligently designed to reduce its weight to 30 grams. Within the entire structure, the weight of the whole structure was reduced to 1.1 kg, and the design was finally realized by the Wuxi Research Institute of Fudan University. It is reported that this chip has established an architecture with brain-like autonomous fault tolerance, and power consumption and chip area are greatly reduced. Relevant research results have been published in international authoritative journals.
Team member, researcher Zou Zhuo of the Micro-Nano System Center of the School of Information Science and Engineering, Fudan University, said: "The success of this experiment means that the system is expected to completely get rid of the backup battery, and only a few pieces of solar panels of several centimeters can achieve energy autonomy. â€
Researchers from both Fudan University and the Aerospace Eight Institute installed a number of “core cloud†systems during the launch, and built the first end-level intelligent application platform. According to the relevant person in charge of the Aerospace Eighth Institute, in the current relatively frequent rocket launching missions, this method has a short launch period, a large number of on-orbits, and low load costs, which is of great value for building a future multi-track space-based information network.
According to the scheduled plan, the team has completed the core technology testing and verification of the on-orbit core and transferred to the on-track long-term management stage. Subsequently, the research teams of the two sides will further carry out a series of experiments such as networking, routing and transmission control protocols, and verify the functions of the chip's autonomous fault tolerance and dynamic reconstruction, and analyze the behavior model of space debris.
According to the project guidance, academician of the Chinese Academy of Sciences, director of the Key Laboratory of Electromagnetic Wave Information Science of the Ministry of Education of Fudan University, Jin Yaqiu introduced that with the implementation of the “One Belt and One Road†initiative and the strategy of the maritime power, the wide-area Internet of Things is used to remote areas and peripheral areas of China. The need for identification and monitoring in hotspots is increasingly urgent. However, due to the curvature of the Earth, terrestrial and shore-based IoT systems can cover a relatively small range. The "core cloud" technology can cover a wide area outside the line of sight, as if a large arm is extended, and the range of maneuverability and extension is greatly increased.
The new IoT payload system has laid a solid technical foundation for China's subsequent research on space-based Internet of Things, space debris monitoring, space environment detection, high-altitude geomagnetic mapping, and also for rocket recycling and space debris disposal. A clever and meaningful attempt at an international public puzzle.
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