Dalian-1 Lianli

Dalian-1 Lianli
Dalian-1 Lianli
Dalian-1 Lianli
Spacecraft name Dalian-1 Lianli
Form factor CubeSat
Units or mass 12U
Mass in kg 17 kg
Status On spacecraft? (Still attached to the Tianzhou-6 cargo spacecraft?)
Launched 2023-05-10
NORAD ID On spacecraft?
Deployer Ultralight Multiple Satellites Deployers (UMSD)
Launcher Long March 7 (Tianzhou)
Organisation Dalian University of Technology
Institution Company
Entity Commercial
Country China
Oneliner

Verify high-resolution remote sensing imaging, domestic high-reliability OpenHarmony operating system, advanced satellite components and 3D printing technology. 

Description

Dalian 1-Lianli satellite is a 12U high-resolution earth remote sensing cube satellite with a mass of 17kg. Its main function is to verify high-resolution remote sensing imaging, domestic high-reliability OpenHarmony operating system, advanced satellite components and 3D printing technology. A series of innovative technologies such as ultra-lightweight deployer.

According to Professor Xia Guangqing, chief designer of the satellite and dean of the School of Aeronautics and Astronautics of the Department of Vehicle  Engineering and Mechanics , the main payload of the Dalian-1-Lianli satellite is a high-resolution multispectral camera. The camera has a total of 5 spectral bands, including full spectrum and multispectral, and can Achieve low-cost sub-meter high-resolution ocean/Earth observation in orbit. The use of the OpenHarmony operating system and the comprehensive solution of domestic processing chips has greatly improved the performance and reliability of the system. Different from the toxic hydrazine propellant used in traditional satellite attitude and orbit control power systems, this satellite uses an innovative hydroxylamine nitrate (HAN) single-component module propulsion system, which is green and non-toxic, has high energy, low power consumption, Features such as pre-packaging greatly improve the rapid maneuverability of micro-nano satellites in orbit.

Before the rocket is launched, the satellite is installed on the outside of the spacecraft through Ultralight Multiple Satellites Deployers (UMSD). "The deployer's high-reliability memory alloy unlocking device, high-performance temperature control and temperature collection circuit, satellite power charging circuit, and telemetry data acquisition circuit and other functional units can overcome the challenges caused by space factors such as high and low temperatures, thermal vacuum, and atomic oxygen corrosion. It is difficult to ensure the reliability of long-term on-orbit storage and release of satellites." said Professor Yu Xiaozhou, chief commander of the satellite.

According to the plan, after the Tianzhou-6 cargo spacecraft completes the rendezvous and docking with the space station, it will choose an opportunity to release the Dalian-1-Lianli satellite. Thereafter, the 7.3mX band ground measurement and control station of Dalian University of Technology will cooperate with the satellite to implement mission uplink and data downlink measurement and control operations, and conduct a series of scientific experiments.

The deployer structure of "Dalian 1-Lianli" consists of multiple components such as the main frame and the hatch. The structure of the main frame is approximately 400 mm × 400 mm × 500 mm in size with a minimum wall thickness of 1 mm. The structure was manufactured from AlSi10Mg on a BLT-S800 equipped with eight 500 W lasers. According to BLT the dimensional accuracy of the key parts of the final production met the operating requirements of the satellite in full to overcome space factors such as high-low temperatures, thermal vacuum, and atomic oxygen corrosion, ensuring the reliability of long-term in-orbit storage before release.

AMU is the first single machine using OpenHarmony real-time operating system. In May 2023, the 12U CubeSat developed by our team carried AMU successfully launched into orbit with China’s cargo spacecraft at Wenchang Space Launch Site.

Sources [1] [2] [3] [4] [5] [6] [7]
Photo sources [1] [2]

Last modified: 2023-12-24

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