Beidou Rocket Dynamic Testing for Separation Reliability
Project name: Beidou Double-Star Program - Rocket Dynamic Testing Application
As a national key space project, the Beidou Double-Star Program utilized the Long March 2C launch vehicle. To ensure the reliability of critical operations like satellite separation, the China Academy of Launch Vehicle Technology employed the DE-series dynamic testing system for comprehensive rocket vibration and separation dynamics tests.
1. Test System Configuration
| Test Item | Sensor Configuration | Key Specifications |
|---|---|---|
| Full-rocket modal test | 200+ triaxial accelerometers | 0.01Hz freq. resolution (0-100Hz) |
| Satellite separation test | HF force sensors (10kHz) | ±1N contact force accuracy |
| Pipeline vibration monitoring | HT strain gauges (300°C) | ±5000με strain range |
| Shock environment recording | MEMS accelerometers (10,000g) | 1MHz sampling rate |
2. Key Technological Breakthroughs
2.1 Multi-physics Synchronization
Simultaneous acquisition of 16 parameter types
Time synchronization accuracy <1μs (meets GJB 2249-2018)
2.2 Separation Dynamics Analysis
Precise capture of spring force time-history
Identified micro-impact events at 0.5ms scale
2.3 Digital Twin Validation
<3% error between test data and simulation
Corrected separation timing prediction algorithm
3. Test Achievements
3.1 Engineering Improvements
Optimized separation spring stiffness (+15%)
Redesigned satellite adapter damping structure
3.2 Launch Verification
Separation velocity error <0.1m/s (req.: 0.5m/s)
40% improvement in orbital insertion accuracy
4. System Advantages
High Reliability - Zero failure in 3 consecutive launches
Environmental Resistance - Operates at -40℃~60℃
Scalability - Upgraded for Long March 5 testing
