Structure & Mechanism Subsystem
1. Main structure
Memblane is located on reverse of the antenna for preventing to hit. Battery is loceted on center of the satellite for ensuring the space for mast.
2. Deployment system for antenna Antenna is fastened by wire string, and it is fused by the heat of the nichrome wire. Antenna is deployed by its restoring force.
3. Deployment system for membrane Deployment system for membrane includes 3 process, fusing wire, deploying mast, deploying membrane. Fusing wire is the same way to deploy the antenna. Mast is deployed by restoring force from shape memory alloy(SMA) which is the main material of mast. Membrane is deployed by restoring force from tape measure. 6 tape measures are built in the membrane. Membrane is folded with spiral folding
2. Deployment system for antenna Antenna is fastened by wire string, and it is fused by the heat of the nichrome wire. Antenna is deployed by its restoring force.
3. Deployment system for membrane Deployment system for membrane includes 3 process, fusing wire, deploying mast, deploying membrane. Fusing wire is the same way to deploy the antenna. Mast is deployed by restoring force from shape memory alloy(SMA) which is the main material of mast. Membrane is deployed by restoring force from tape measure. 6 tape measures are built in the membrane. Membrane is folded with spiral folding
Electrical Power Subsystem
1. Power generation system
In this satellite, power is generated by solar cell. Solar cells are loceted on side of the satellite.
2. Storage system This satellite loads lithium ion battery for storage enough power for operation when satellite is in the shade. Surplus energy from solor cells are storaged in the battery.
3. Control system for charging According to degrade of solar cells by radioactivity, in advance operation energy is lower than power generation from solar cells. But surplus energy makes heat of battery and lifespan of battery becomes shorter. This satellite loads control system IC for chraging battery to protect declining the lifespan of battery.
2. Storage system This satellite loads lithium ion battery for storage enough power for operation when satellite is in the shade. Surplus energy from solor cells are storaged in the battery.
3. Control system for charging According to degrade of solar cells by radioactivity, in advance operation energy is lower than power generation from solar cells. But surplus energy makes heat of battery and lifespan of battery becomes shorter. This satellite loads control system IC for chraging battery to protect declining the lifespan of battery.
Communication Subsystem
1. Summary
- HKD transmission for check the satellite.
- Transmitting datas from device of satellite.
- Receiving the command from ground station.
2. Satellite station
2.1 Summary
Transceiver of satellite receives command from earth and transmits teremetry and mission data to ground station.
2.2 Consistution of satellite station
Devices and consistution of satellite station are shown below.
comming soon...
2.3 Transmit wave from satellite station
About receiving satellite is here.
3. Ground station 3.1 Summary
Ground station is used to transmit and receive the FM/CW signal to WASEDA-SAT3. Ground station is placed in Nishiwaseda and Kitakyushu campus. Its consistition is of antenna, transceiver and TNC etc.
3.2 Consistution of ground station
Coming soon...
3.3 Transmit wave from ground station
4. Budget calculation
Transceiver of satellite receives command from earth and transmits teremetry and mission data to ground station.
2.2 Consistution of satellite station
Devices and consistution of satellite station are shown below.
comming soon...
2.3 Transmit wave from satellite station
3. Ground station 3.1 Summary
Ground station is used to transmit and receive the FM/CW signal to WASEDA-SAT3. Ground station is placed in Nishiwaseda and Kitakyushu campus. Its consistition is of antenna, transceiver and TNC etc.
3.2 Consistution of ground station
Coming soon...
3.3 Transmit wave from ground station
4. Budget calculation
Command and Data Handling Subsystem
1. Summary
There are purposes of command and data handling subsystem shown below.
- Sensing the temperture and strain of satellite.
- turn on LED on membrane.
- Transmit to ground station.
Thermal Subsystem
Thermal control
Attitude Control Subsystem
Purpose
There is no attitude control system in this satellite. But we check the effective of gravity gradient for attitude control. And we check the effect from deployment of membrane and attitude control from deployment system.
