UZAY
Interface Units
PIU
(Payload Interface Equipment)
Payload Interface Equipment is a reliable interface equipment that can be adapted to different satellite platforms (e.g. microsatellite). Thanks to its smart unit, cost-effective material diversity and modular equipment structure, it is capable of meeting various digital and analog interface needs.
GAYE brings the following features to the satellite space segment:
- Smart unit and peripherals for payload software
- TM-TC services and interfaces for imaging and scientific payloads
- Control and monitoring of task loads using CAN, RS-422/RS-485, Spacewire and LVDS buses
- Fault tolerant architecture with redundant structure and hardware protection features
GAYE Features
Main Features
- MPF500T Based Polarfire FPGA
- Powerful, High-Reliability RISC-V Based Processor
- 4 MB SRAM/MRAM, 4 GB SDRAM, 32 GB NAND Flash
Hardware Fault Detection, Extraction and Recovery (HFDR) Features
- Secondary Voltage Switch with Overcurrent Protection
- Power Switch Automatic Reset Feature after Overcurrent Protection
- Soft Start Feature
- In-equipment temperature monitoring
- Reading in-equipment current and voltage values
- Redundant in-equipment bus
Budget
Supply: 28V nominal (voltage input range 15V - 50V)
Power: 30W (nominal)
Dimension: mm x mm x mm (Width x Length x Height)
Weight: kg
Interfaces
2 CAN
14 RS-422/RS-485
2 x Spacewire
Xbant: Dual Channel LVDS
Test: 1 JTAG
History/ Platforms Involved
AYAP-1
Environmental / Reliability
Thermal:-20 to +50 C
Vibration
Shock
EMI/EMC: MIL-STD-461
Lifespan At least 1 year
SEU resistant
Latchup Immune
TMIE
(Temperature Monitoring Interface Equipment)
The Temperature Monitoring Interface Equipment (SAYE) is an interface unit to which all thermistors throughout the satellite are connected. This interface unit reads the temperature data received from the thermistors and transmits it to the Satellite Management Unit (SMU) when requested. Thermal control of the satellite is provided with the received temperature data. Another task of SAYE is to read analog voltage levels other than temperature.
GAYE provides the following functions:
- Can be configured as hot redundant or cold redundant if desired
- Providing communication using MIL-STD-1553B and CAN buses
- Fault tolerant architecture with redundant structure and hardware protection features
- 366 NTC thermistor reading capacity
SAYE Features
Main Features
- Radiation resistant design with RTAX FPGA
- Communication with MIL-STD-1553 and CAN
- Remote control of the equipment with on-off commands
- Reading 183 zones with thermistors with redundant architecture
- Reading PTC and NTC thermistors
- Heat resistance with Aeroglaze surface coating
- -20°C to +50°C operating temperature
Budget
Supply: 100V (GEO) - 80V/120V (Input Voltage Range Where Equipment Will Not Be Damaged)
28V (LEO) - 15V - 50V (Input Voltage Range Where Equipment Will Not Be Damaged)
Power: 7.5W - 14W (nominal)
Size: 310 mm x 220 mm x 260 mm (Width x Length x Height)
Data Bus : 2 x 2 MIL-STD-1553 (Redundant system), 2 x 2 CAN (*CAN communication has been added in AAP-1 satellite - Redundant system)
Weight: 8.3 kg
EMI/EMC: MIL-STD-461
Lifespan 5 - 15 years
SEU resistant
Latchup Immune
History / Platforms
TÜRKSAT 6A, AYAP-1
REIU
(Reaction Wheel Interface Unit)
The Reaction Wheel Interface Unit is the equipment that enables communication between the Satellite Management Equipment and the reaction wheels.
TTAB Features
Main Features
- It has MIL-1553B communication standard for system communication.
- FPGA is used as the smart unit.
- The use of FPGAs provides high characteristics in terms of reliability, radiation resistance and temporal accuracy.
- The initialization command of the equipment is given by the HPC.
- It has a backup unit that will operate as cold/hot redundant.
Interfaces
4 x 12-bit DAC(0v-10v)
8 x TSM1
4 x LPC
4 x ASM
8 x BSM/BDM
2 x MIL-1553B
2 x HPC receiver
Budget
Supply: 100V
Weight : 3.6 kg
Power: 7W (max) - 6W (min)
Dimensions : 288 mm x 220 mm x 94.6mm (Width x Length x Height)
History / Platforms
TÜRKSAT 6A
Environmental / Reliability
Thermal:-20 to +50 C
Vibration
Shock
EMI/EMC: MIL-STD-461
Lifespan 5 - 15 years
SEU resistant
Latchup Immune
