CDH-FS
Satellite On-Board Command & Data Handling Subsystem with Built-In Redundancy
ADVANCED SPACECRAFT COMPUTING
The CAVU CDH-FS represents the pinnacle of on-board computer systems, featuring a fully redundant FPGA-based architecture designed to guarantee continuous operation. With a backup processor that seamlessly engages upon primary processor failure, this system is not just reliable; it’s essential for critical missions. Engineered to resist severe space conditions like radiation and cosmic rays, it leverages the efficiency and SEU immunity of Microchip/Microsemi SmartFusion2 and ProASIC3 Flash-based FPGAs.
KEY SYSTEM FEATURES
- Dual Cold/Hot Redundant OBC Modules
- Dual Cold/Hot Redundant ADC/DAC Modules
- Double Hot Redundant ADC Converters
- Advanced Supervisor & Health Monitoring Module
- Efficient Data Synchronization Between OBC Modules
- Three Selectable Boot Regions from Bootloader
- Fully Customizable Configuration
ENHANCED SYSTEM REDUNDANCY
The CDH-FS includes two CAVU CDH-1 modules paired with an intelligent supervisor board to enhance operational security. An interface board duplicates all signals to both main and backup boards, ensuring no single point of failure. System health and performance are continuously monitored, with automatic failover to a redundant board if anomalies are detected, ensuring mission-critical reliability.
ROBUST SATELLITE COMMAND CONTROL
Designed for the complex demands of the satellite industry, the CDH-FS supports over 15 serial interfaces and features extensive I/O capabilities with 200 GPIOs & 128CH ADC. This versatility allows for precise control over a wide range of sensors and actuators, making the CDH-FS a formidable tool in satellite computing. Its superior reliability, redundancy, and flexibility make it the go-to solution for diverse satellite missions.
SPECIAL FEATURES
- Expected Life-time: 3-5 years in LEO
- On-Board Current & Temperature Monitoring
- External On-Board Watchdog Monitor via Supervisor
- Power Consumption Monitoring via Supervisor
- Triple Real Time Clock
- Hot Redundant On-Board Voltage Converters
- Intelligent Fail-Safe Switch-Over Algorithm
PROCESSOR
- ARM Cortex-M3 on FPGA
- Microchip/Microsemi SmartFuion2 Flash Based FPGA
- Microsemi ProASIC3 Flash Based FPGA for Interaface
- FPU on FPGA Upon Request
- 150 DMIPS @ 128MHz
- SoftConsole/Keil Programming and Debug via JTAG
MEMORY
- RAM: 160Mbits MRAM 40 bits width (128Mbits+32Mbits ECC)
- ROM: 96Mbits MRAM (Con figurable as Triple 32Mbits)
- Nonvolatile Flash Memory:
- Total 24Gbit SLC NAND Flash (Triple 8G)
- 256K Serial FRAM
- 256M Serial NOR
ENVIRONMENT
- Radiation Hardness:
- Total Ionizing Dose: 30Krad (Si)/yr
- Latch-up Immune
- SEE @ 60MeV
- Temperature & Pressure: -40 C to +85 C @ 10-8 bar
- Shocks: 2000g, 2000-10000Hz
- Random Vibrations: 14g(RMS) 3-Axis , 20~2000Hz
INTERFACES
- DIGITAL/ANALOG:
- Digital Outputs (5V/3.3V) : 100
- Digital Inputs (5V/3.3V) : 90
- PWM/Pulse Outputs (5V/3.3V) : 10
- ADC (-10V~+10V) : 128CH 16-bit, (+20V Range Available)
- DAC(0V~5V) : 2CH 8-bit
- Serial Interfaces:
- CAN2.0 Up to 1Mbps : 5
- Full-Duplex RS422 : 8
- Half-Duplex RS485 : 8
- RS232 :1
- I2C : 1
- SPI : 1
BUDGET
- Dimensions: 205x203x87mm
- Mass: 4250gr
- Power Supply: 5V ±5%, Custom Range Available
- Power Consumption: 3W ~ 5W
PRODUCT DOCUMENTS
CDH-FS is flight proven onboard computer for number of satellite projects and we have full ECSS/ NASA documentation documents & test reports.
- Failure Modes, Effects, and Criticality Analysis (FMECA)
- Reliability Analysis Report
- Radiation Analysis Report
- Safety Assurance Plan
- Fault Tree Analysis (FTA)
- Single Point Failure Analysis (SPFA)
- Worst Case Analysis (WCA)
- Derating Analysis Report
- Availability Analysis Report
- Mechanical Analysis Report
- Maintainability Analysis Report
- Fault Detection, Isolation, and Recovery (FDIR)
- Qualification Test Plan (QTP)
- Environmental Test Reports, TVAC, Vib.
- EMC/EMI Test Report
- Radiation Test Report
- Operational Risk Assessment (ORA)
- Critical Items List (CIL)
- Materials, Processes, and Mechanical Parts List (MPMPL)
- Product Assurance Plan (PAP)
- Configuration Item Data List (CIDL)
- End Item Data Package (EIDP)
- As-Built Configuration List (ABCL)
